Repository: essandess/macOS-Fortress Branch: master Commit: fa709de78eef Files: 33 Total size: 642.3 KB Directory structure: gitextract_vxp6e2ml/ ├── .gitmodules ├── LICENSE ├── README.md ├── blacklist.txt ├── blockips.conf ├── com.github.essandess.easylist-pac.plist ├── config ├── deprecated/ │ ├── Squid.wrapper │ ├── disable.sh │ ├── macosfortress_boot_check │ ├── net.securemecca.pac.plist │ ├── org.adblockplus.privoxy-adblock.plist │ └── squid-27.conf ├── disable.sh ├── macosfortress_setup_check.sh ├── match-all.action ├── net.dshield.block.plist ├── net.emergingthreats.blockips.plist ├── net.hphosts.hosts.plist ├── net.openbsd.pf.brutexpire.plist ├── net.openbsd.pf.plist ├── org.opensource.flashcookiedelete.plist ├── org.squid-cache.squid-rotate.plist ├── pf.conf ├── pf_attacks ├── pf_restart ├── privoxy_restart ├── proxy.pac ├── readme-and-install.sh ├── squid.conf ├── squid_restart ├── user.action └── whitelist.txt ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitmodules ================================================ [submodule "privoxy-adblock"] path = deprecated/privoxy-adblock url = ../privoxy-adblock.git [submodule "easylist-pac-privoxy"] path = easylist-pac-privoxy url = ../easylist-pac-privoxy.git branch = master [submodule "macOS-clamAV"] path = deprecated/macOS-clamAV url = ../macOS-clamAV.git ================================================ FILE: LICENSE ================================================ The MIT License (MIT) Copyright (c) 2014 essandess Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ================================================ FILE: README.md ================================================ macOS-Fortress =========== # macOS-Fortress: Firewall, Blackhole, and Privatizing Proxy for Trackers, Attackers, Malware, Adware, and Spammers; with On-Demand and On-Access Anti-Virus Scanning Kernel-level, OS-level, and client-level security for macOS. Built to address a steady stream of attacks visible on snort and server logs, as well as blocks ads, malicious scripts, and conceal information used to track you around the web. After this package was installed, snort and other detections have fallen to a fraction with a few simple blocking actions. This setup is a lot more capable and effective than using a simple adblocking browser add-on. There's a world of difference between ad-filled web pages with and without a filtering proxy server. It's also saved me from inadvertantly clicking on phishing links. ## Proxy features * macOS adaptive firewall * Adaptive firewall to brute force attacks * IP blocks updated about twice a day from emergingthreats.net (IP blocks, compromised hosts, Malvertisers) and [dshield.org](https://secure.dshield.org)’s top-20 * Host blocks updated about twice a day from [hphosts.net](https://www.hosts-file.net) * HTTPS Inspection using [Privoxy](http://www.privoxy.org) * [EasyList](https://easylist.to/index.html) Tracker and Adblock Rules for [Privoxy](http://www.privoxy.org) with [adblock2privoxy](../../../adblock2privoxy) * Incorporates multiple blocking rulesets into both Privoxy and PAC formats, including [easyprivacy.txt](https://easylist.to/easylist/easyprivacy.txt), [easylist.txt](https://easylist.to/easylist/easylist.txt), [fanboy-annoyance.txt](https://easylist.to/easylist/fanboy-annoyance.txt), [fanboy-social.txt](https://easylist.to/easylist/fanboy-social.txt), [antiadblockfilters.txt](https://easylist-downloads.adblockplus.org/antiadblockfilters.txt), [malwaredomains_full.txt](https://easylist-downloads.adblockplus.org/malwaredomains_full.txt), and the anti-spamware list [adblock-list.txt](https://raw.githubusercontent.com/Dawsey21/Lists/master/adblock-list.txt). ## Anti-Virus features * Configures [clamAV](http://www.clamav.net) for macOS with regular on-demand scans and on-access scanning of user `Downloads` and `Desktop` directories. * See the [MacPorts](https://www.macports.org/) port `clamav-server` for details, `port notes clamav-server`. ## Installation ```bash sudo port install macos-fortress port notes macos-fortress sudo port load macos-fortress ``` After initial installation, it is necessary to kickstart these launch daemons, which run on a schedule, and do not run at load time: ```bash sudo launchctl kickstart -k system/org.macports.macos-fortress-dshield sudo launchctl kickstart -k system/org.macports.macos-fortress-emergingthreats sudo launchctl kickstart -k system/org.macports.macos-fortress-hphosts sudo launchctl kickstart -k system/org.macports.adblock2privoxy sudo launchctl kickstart -k system/org.macports.macos-fortress-easylistpac ``` The default web server is native macOS Apache, which must be started with the command: ```bash sudo apachectl start ``` Note that all files in this repo are superceded by the MacPorts port [macos-fortress](https://github.com/macports/macports-ports/tree/master/net/macos-fortress), including the deprecated installation script [readme-and-install.sh](./readme-and-install.sh). ### Firewall-only installation ```bash sudo port install macos-fortress-pf port notes macos-fortress-pf sudo port load macos-fortress-pf ``` ### Proxy-only installation ```bash sudo port install macos-fortress-proxy port notes macos-fortress-proxy sudo port load macos-fortress-proxy ``` ## Check and troubleshoot setup > `sudo sh macosfortress_setup_check.sh` Working output: ``` Checking macOS-Fortress installed items (run as sudo)… Checking launchd.plist files… [✅] /Library/LaunchDaemons/net.openbsd.pf.plist exists [✅] /Library/LaunchDaemons/net.openbsd.pf.brutexpire.plist exists [✅] /Library/LaunchDaemons/net.emergingthreats.blockips.plist exists [✅] /Library/LaunchDaemons/net.dshield.block.plist exists [✅] /Library/LaunchDaemons/net.hphosts.hosts.plist exists [✅] /Library/LaunchDaemons/com.github.essandess.easylist-pac.plist exists [✅] /Library/LaunchDaemons/com.github.essandess.adblock2privoxy.plist exists [✅] /Library/LaunchDaemons/com.github.essandess.adblock2privoxy.nginx.plist exists [✅] /Library/LaunchDaemons/org.squid-cache.squid-rotate.plist exists [✅] /Library/LaunchDaemons/org.macports.Privoxy.plist exists [✅] /Library/LaunchDaemons/org.macports.clamd.plist exists [✅] /Library/LaunchDaemons/org.macports.freshclam.plist exists [✅] /Library/LaunchDaemons/org.macports.ClamavScanSchedule.plist exists [✅] /Library/LaunchDaemons/org.macports.ClamavScanOnAccess.plist exists Checking launchd.plist's. These should all be installed with return code 0 (2d column of `sudo launchctl list`)… [✅] - 0 com.github.essandess.easylist-pac [✅] - 0 net.dshield.block [✅] 91695 0 org.macports.ClamdScanOnAccess [✅] - 0 org.macports.freshclam [✅] - 0 net.openbsd.pf [✅] - 0 com.github.essandess.adblock2privoxy [✅] 35403 0 org.macports.clamd [✅] - 0 org.macports.ClamavScanSchedule [✅] - 0 net.openbsd.pf.brutexpire [✅] - 0 net.emergingthreats.blockips [✅] 36183 0 org.macports.Privoxy [✅] 5578 0 com.github.essandess.adblock2privoxy.nginx [✅] - 0 net.hphosts.hosts Checking PF files… [✅] /etc/pf.conf exists [✅] /usr/local/etc/blockips.conf exists [✅] /usr/local/etc/emerging-Block-IPs.txt exists [✅] /usr/local/etc/compromised-ips.txt exists [✅] /usr/local/etc/dshield_block_ip.txt exists [✅] /usr/local/etc/block.txt exists [✅] /usr/local/etc/block.txt.asc exists Checking PF… [✅] PF is enabled and running Checking hphosts files… [✅] /etc/hosts-hphosts exists [✅] /usr/local/etc/hosts.zip exists [✅] /usr/local/etc/hphosts-partial.asp exists [✅] /usr/local/etc/whitelist.txt exists [✅] /usr/local/etc/blacklist.txt exists Checking /etc/hosts-hphosts creation… [✅] /etc/hosts-hphosts exists Checking proxy PAC and proxy chain files… [✅] /Library/WebServer/Documents/proxy.pac.orig exists [✅] /Library/WebServer/Documents/proxy.pac exists [✅] /usr/local/bin/easylist_pac.py exists [✅] /usr/local/bin/adblock2privoxy exists [✅] /usr/local/etc/proxy.pac exists [✅] /usr/local/etc/adblock2privoxy/nginx.conf exists [✅] /usr/local/etc/adblock2privoxy/css/default.html exists [✅] /usr/local/etc/adblock2privoxy/privoxy/ab2p.action exists [✅] /usr/local/etc/adblock2privoxy/privoxy/ab2p.filter exists [✅] /usr/local/etc/adblock2privoxy/privoxy/ab2p.system.action exists [✅] /usr/local/etc/adblock2privoxy/privoxy/ab2p.system.filter exists [✅] /opt/local/etc/privoxy/config exists [✅] /opt/local/var/log/privoxy/logfile exists Checking proxy status… [✅] Privoxy is running properly [✅] Privoxy config http://p.p/ via http://localhost:3128 is running properly [✅] nginx is running properly [✅] PAC /Library/WebServer/Documents/proxy.pac.orig passes Javascript parsing [✅] PAC /Library/WebServer/Documents/proxy.pac passes Javascript parsing [✅] Web server for http://localhost/proxy.pac is running properly [✅] Blackhole server for http://localhost:8119/ is running properly ``` ## Disabling ``` sudo port unload macos-fortress ``` or ``` sudo port uninstall macos-fortress ``` This repo is superceded by the MacPorts port [macos-fortress](https://github.com/macports/macports-ports/tree/master/net/macos-fortress), including the deprecated disable/uninstall script [disable.sh](./disable.sh), which was originally used to unload all launch daemons, disable the pf firewall, and list all installed files **without** removing them. ## Configuration modifications There are three major, independent, and configurable components to the repo: the PF firewall, the proxy chain, and the AV scanner. Here are a few configuration pointers. ### PF firewall The file [pf.conf](./pf.conf) controls the firewall ruleset and likely must be edited on a specific computer and network, or edited for a VPN server [configuration](../../../macos-openvpn-server/pf.conf). * The PF firewall can be disabled with the command: > `sudo pfctl -d` * The variable `int_if` for the internal interface is set to `en0`. This should be changed to the active interface on your computer, which can be determined with the command `ifconfig -a`, or more specificall: > `ifconfig | pcregrep -M -o '^[^\t:]+:([^\n]|\n\t)*status: active' | egrep -o -m 1 '^[^\t:]+'` * The table `` is set to the standard reserved ranges `{ 10/8, 172.16/12, 192.168/16 }`. This must be changed to the CIDR ranges on the specific LAN. * Specific services accessible only on the LAN and on the open internet should be selected and set in the appropriate variables. See `/etc/services`. * The PF firewall ruleset can be flushed, enabled, and reintialized with the command: > `sudo pfctl -Fall && sudo pfctl -ef /etc/pf.conf` * See the `pfctl` commands in the script [pf_attacks](./pf_attacks) to determine IP addresses and counts for the various blocked IPs. E.g., the adaptive table `` is shown using the command: > `sudo pfctl -t bruteforce -Ts` ### Proxy Privoxy on port 8118 is configured in [config](./config) to sent web requests to the internet, wih HTTPS inspection configured for blocking content within TLS encrypted tunnels—the great majorityof we content. An auxiliary nginx webserver for CSS-based element hiding is configured on port 8119. Privoxy `.action` and `.filter` files, and nginx `.css` files are created from Easylist rules using the repo [adblock2privoxy](../../../adblock2privoxy). Browsing to the privoxy configuration page http://p.p/ through any of these proxy configurations is a check on whether the proxy is running and configured correctly. To provide these services on a firewalled LAN, edit the privoxy and nginx configuration files [config](./config), and [nginx.conf](../../../adblock2privoxy//nginx.conf) so that they're available for devices on the LAN, or connecting from a [VPN tunnel](../../../macos-openvpn-server/). ### Macports updates Update Macports packages regularly. This command with update the Macports database, update all installed packages, and uninstall all older, inactive versions. `sudo bash -c 'port selfupdate ; port -puN upgrade outdated ; port uninstall inactive'` ### Warning about Privoxy compression Though it's possible to build Privoxy with the `configure` `--enable-compression` option, compressed HTTP traffic within a [VPN tunnel](../../../macos-openvpn-server) exposes your traffic to the CRIME/BEAST/[VORACLE](https://openvpn.net/security-advisory/the-voracle-attack-vulnerability/) attacks and is generally not recommended. ## Installation details The MacPorts port [macos-fortress](https://github.com/macports/macports-ports/tree/master/net/macos-fortress) (`sudo port install macos-fortress`) installs and configures an macOS Firewall and Privatizing Proxy. It will: * Uses Macports to download and install several key utilities and applications (wget gnupg p7zip squid privoxy nmap) * Configure macOS's PF native firewall (man pfctl, man pf.conf), and privoxy * Networking on the local computer can be set up to use this Automatic Proxy Configuration without breaking App Store or other updates (see Privoxy config) * Uncomment the nat directive in pf.conf if you wish to set up an [OpenVPN server](../../../macos-openvpn-server) * Install and launch daemons that download and regularly update open source IP and host blacklists. The sources are emergingthreats.net (net.emergingthreats.blockips.plist), dshield.org (net.dshield.block.plist), hosts-file.net (net.hphosts.hosts.plist) * After installation the connection between clients and the internet looks this this: > **Application** :arrow_right: **`proxy.pac`** :arrow_right:port 8118:arrow_right: **Privoxy** :arrow_right: **Internet** An auxilliary nginx-based webserver (nominally on `localhost:8119`) is used for both a `proxy.pac` ad and tracker blackhole and for CSS element blocking rules with the Privoxy configuration generated by [adblock2privoxy](../../../adblock2privoxy). ## Public Service Announcement This firewall is configured to block all known tracker and adware content—in the browser, in-app, wherever it finds them. Many websites now offer an additional way to block ads: subscribe to their content. Security and privacy will always necessitate ad blocking, but now that this software has become mainstream with mainstream effects, ad blocker users must consider the [potential impact](http://arstechnica.com/business/2010/03/why-ad-blocking-is-devastating-to-the-sites-you-love/) of ad blocking on the writers and publications that are important to them. Personally, two publications that I gladly pay for, especially for their important 2016 US Presidential election coverage, are the *[New York Times](http://www.nytimes.com)* and *[The Atlantic](http://www.theatlantic.com)*. I encourage all users to subscribe to their own preferred publications and writers. ## Tracker blocking [Lightbeam](https://www.mozilla.org/en-US/lightbeam/), the tracking tracker Firefox add-on, shows how ad- and tracker-blocking works to prevent third parties monitoring you or your children's online activities. My daughter enjoys the learning exercises at the children's website [ABCya!](http://www.abcya.com). The Lightbeam graph below on the left shows all the third party trackers after less than a minute of browser activity, without using a privatizing proxy. The graph on the right shows all this tracker activity blocked when this privatizing proxy is used. ![Lightbeam graph without proxy](Lightbeam_noproxy.png)| ![Lightbeam graph without proxy](Lightbeam_proxy.png) ------------ | ------------- Lightbeam graph without proxy | Lightbeam graph with proxy This problem is the subject of Gary Kovacs's TED talk, *Tracking Our Online Trackers:* [![Tracking our online trackers](https://www.wired.com/images_blogs/business/2012/02/6792752454_99d91d2a92_z.jpg)](https://www.youtube.com/watch?v=f_f5wNw-2c0 "Tracking our online trackers") ## Attack blocking The snort intrusion detection system reports far fewer events when known attack sites are blackholed by the packet filter: ![snort+BASE Overview](BASE_Overview.PNG)| ![snort+BASE Events](BASE_Events.PNG) ------------ | ------------- snort+BASE Overview | snort+BASE Events ## Notes * Configure the squid proxy to accept connections on the LAN IP and set LAN device Automatic Proxy Configurations to http://lan_ip/proxy.pac to protect devices on the LAN. * Count the number of attacks since boot with the script pf_attacks. ``Attack'' is defined as the number of blocked IPs in PF's bruteforce table plus the number of denied connections from blacklisted IPs in the tables compromised_ips, dshield_block_ip, and emerging_threats. * Both squid and Privoxy are configured to forge the User-Agent. The default is an iPad to allow mobile device access. Change this to your local needs if necessary. * Whitelist or blacklist specific domain names with the files `/usr/local/etc/whitelist.txt` and `/usr/local/etc/blacklist.txt`. After editing these file, use launchctl to unload and load the plist `/Library/LaunchDaemons/net.hphosts.hosts.plist`, which recreates the hostfile `/etc/hosts-hphost` and reconfigures the squid proxy to use the updates. * Sometimes pf and privoxy do not launch at boot, in spite of the use of the use of their launch daemons. Fix this by hand after boot with the scripts `macosfortress_boot_check`, or individually using `pf_restart`, `privoxy_restart`, and `squid_restart`. And please post a solution if you find one. * All open source updates are done using the `wget -N` option to save everyone's bandwidth ## Security * These services are intended to be run on a secure LAN behind a router firewall. * The default proxy configuration will only accept connections made from the local computer (localhost). If you change this to accept connections from any client on your LAN, do not configure the router to forward ports 8118, or you will be running an open web proxy. ================================================ FILE: blacklist.txt ================================================ # blacklisted hosts of the form "127.0.0.1 hostname.tld" appened to /etc/hosts # 127.0.0.1 www.ahostnamethatyouwanttoblackholebutwillneveractuallyseeontheinternet.net # https://krebsonsecurity.com/2014/01/deconstructing-the-9-84-credit-card-hustle/ 127.0.0.1 callscs.in 127.0.0.1 cewebcs.com 127.0.0.1 cs-casa.com 127.0.0.1 cewcs.com 127.0.0.1 eduacc.in 127.0.0.1 educs.in 127.0.0.1 eetsac.com 127.0.0.1 etosac.com 127.0.0.1 feosac.com 127.0.0.1 foculu.com 127.0.0.1 homecs.in 127.0.0.1 iawcs.com 127.0.0.1 iewcs.com 127.0.0.1 livecs.in 127.0.0.1 netcs.in 127.0.0.1 ntccs.in 127.0.0.1 ntsupp.com 127.0.0.1 onwsac.com 127.0.0.1 premcs.in 127.0.0.1 profcs.com 127.0.0.1 quikcs.com 127.0.0.1 sacluc.com 127.0.0.1 sacsis.com 127.0.0.1 sewcs.com 127.0.0.1 suppcs.in 127.0.0.1 tdwcs.com 127.0.0.1 techcs.in 127.0.0.1 vagacs.com 127.0.0.1 webcs.in # https://guardianapp.com/ios-app-location-report-sep2018.html 127.0.0.1 api.areametrics.com 127.0.0.1 in.cuebiq.com 127.0.0.1 et.intake.factual.com 127.0.0.1 api.factual.com 127.0.0.1 api.beaconsinspace.com 127.0.0.1 api.huq.io 127.0.0.1 m2m-api.inmarket.com 127.0.0.1 mobileapi.mobiquitynetworks.com 127.0.0.1 sdk.revealmobile.com 127.0.0.1 api.safegraph.com 127.0.0.1 incoming-data-sense360.s3.amazonaws.com 127.0.0.1 ios-quinoa-personal-identify-prod.sense360eng.com 127.0.0.1 ios-quinoa-events-prod.sense360eng.com 127.0.0.1 ios-quinoa-high-frequency-events-prod.sense360eng.com 127.0.0.1 v1.blueberry.cloud.databerries.com 127.0.0.1 pie.wirelessregistry.com # Blocking this domain breaks CNN app live streaming -- send to nginx blackhole # To diagnose: # tcpdump -e -ttt -i en0 -w my-iPad-cnn-3128.pcap src my-iPad or dst my-iPad # grep -a 'URL: .*$/\1/; print;' | uniq 127.0.0.1:8119 bea4.v.fwmrm.net ================================================ FILE: blockips.conf ================================================ # Define tables and drop rules for open source IP blocks # Reload with: # pfctl -a blockips -T load -f /usr/local/etc/blockips.conf # Emerging Threats Open Source, http://rules.emergingthreats.net/fwrules/ # http://rules.emergingthreats.net/fwrules/emerging-Block-IPs.txt table persist file "/usr/local/etc/emerging-Block-IPs.txt" block drop log quick from to any # http://rules.emergingthreats.net/blockrules/compromised-ips.txt table persist file "/usr/local/etc/compromised-ips.txt" block drop log quick from to any # THIS RULESET HAS BEEN OBSOLETED!! # http://rules.emergingthreats.net/blockrules/rbn-ips.txt #table persist file "/usr/local/etc/rbn-ips.txt" #block drop log quick from to any # http://rules.emergingthreats.net/blockrules/rbn-malvertisers-ips.txt #table persist file "/usr/local/etc/rbn-malvertisers-ips.txt" #block drop log quick from to any # dshield.org block list table persist file "/usr/local/etc/dshield_block_ip.txt" block drop log quick from to any ================================================ FILE: com.github.essandess.easylist-pac.plist ================================================ Label com.github.essandess.easylist-pac Program /bin/bash ProgramArguments /bin/bash -c PATH=$PATH:/opt/local/bin PROXY_PAC_DIRECTORY=/Library/WebServer/Documents PYTHONIOENCODING=utf_8 ; /bin/mkdir -p /usr/local/etc ; ( /bin/test -f $PROXY_PAC_DIRECTORY/proxy.pac.orig || /usr/bin/install -m 644 -S $PROXY_PAC_DIRECTORY/proxy.pac $PROXY_PAC_DIRECTORY/proxy.pac.orig ) && /usr/local/bin/easylist_pac.py -p 127.0.0.1:3128 -b 127.0.0.1:8119 -d /usr/local/etc -P $PROXY_PAC_DIRECTORY/proxy.pac.orig && /usr/bin/install -m 644 -g admin -S /usr/local/etc/proxy.pac $PROXY_PAC_DIRECTORY/proxy.pac RunAtLoad StartCalendarInterval Weekday 7 Hour 1 Minute 10 StandardErrorPath /var/log/system.log StandardOutPath /var/log/system.log ================================================ FILE: config ================================================ # Sample Configuration File for Privoxy 3.0.26 # # $Id: config,v 1.112 2016/08/26 13:14:18 fabiankeil Exp $ # # Copyright (C) 2001-2016 Privoxy Developers https://www.privoxy.org/ # ##################################################################### # # # Table of Contents # # # # I. INTRODUCTION # # II. FORMAT OF THE CONFIGURATION FILE # # # # 1. LOCAL SET-UP DOCUMENTATION # # 2. CONFIGURATION AND LOG FILE LOCATIONS # # 3. DEBUGGING # # 4. ACCESS CONTROL AND SECURITY # # 5. FORWARDING # # 6. MISCELLANEOUS # # 7. WINDOWS GUI OPTIONS # # # ##################################################################### # # # I. INTRODUCTION # =============== # # This file holds Privoxy's main configuration. Privoxy detects # configuration changes automatically, so you don't have to restart # it unless you want to load a different configuration file. # # The configuration will be reloaded with the first request after # the change was done, this request itself will still use the old # configuration, though. In other words: it takes two requests # before you see the result of your changes. Requests that are # dropped due to ACL don't trigger reloads. # # When starting Privoxy on Unix systems, give the location of this # file as last argument. On Windows systems, Privoxy will look for # this file with the name 'config.txt' in the current working # directory of the Privoxy process. # # # II. FORMAT OF THE CONFIGURATION FILE # ==================================== # # Configuration lines consist of an initial keyword followed by a # list of values, all separated by whitespace (any number of spaces # or tabs). For example, # # actionsfile default.action # # Indicates that the actionsfile is named 'default.action'. # # The '#' indicates a comment. Any part of a line following a '#' is # ignored, except if the '#' is preceded by a '\'. # # Thus, by placing a # at the start of an existing configuration # line, you can make it a comment and it will be treated as if it # weren't there. This is called "commenting out" an option and can # be useful. Removing the # again is called "uncommenting". # # Note that commenting out an option and leaving it at its default # are two completely different things! Most options behave very # differently when unset. See the "Effect if unset" explanation in # each option's description for details. # # Long lines can be continued on the next line by using a `\' as the # last character. # # # 1. LOCAL SET-UP DOCUMENTATION # ============================== # # If you intend to operate Privoxy for more users than just # yourself, it might be a good idea to let them know how to reach # you, what you block and why you do that, your policies, etc. # # # 1.1. user-manual # ================= # # Specifies: # # Location of the Privoxy User Manual. # # Type of value: # # A fully qualified URI # # Default value: # # Unset # # Effect if unset: # # https://www.privoxy.org/version/user-manual/ will be used, # where version is the Privoxy version. # # Notes: # # The User Manual URI is the single best source of information # on Privoxy, and is used for help links from some of the # internal CGI pages. The manual itself is normally packaged # with the binary distributions, so you probably want to set # this to a locally installed copy. # # Examples: # # The best all purpose solution is simply to put the full local # PATH to where the User Manual is located: # # user-manual /usr/share/doc/privoxy/user-manual # # The User Manual is then available to anyone with access to # Privoxy, by following the built-in URL: http:// # config.privoxy.org/user-manual/ (or the shortcut: http://p.p/ # user-manual/). # # If the documentation is not on the local system, it can be # accessed from a remote server, as: # # user-manual http://example.com/privoxy/user-manual/ # # WARNING!!! # # If set, this option should be the first option in the # config file, because it is used while the config file is # being read. # #user-manual https://www.privoxy.org/user-manual/ # # 1.2. trust-info-url # ==================== # # Specifies: # # A URL to be displayed in the error page that users will see if # access to an untrusted page is denied. # # Type of value: # # URL # # Default value: # # Unset # # Effect if unset: # # No links are displayed on the "untrusted" error page. # # Notes: # # The value of this option only matters if the experimental # trust mechanism has been activated. (See trustfile below.) # # If you use the trust mechanism, it is a good idea to write up # some on-line documentation about your trust policy and to # specify the URL(s) here. Use multiple times for multiple URLs. # # The URL(s) should be added to the trustfile as well, so users # don't end up locked out from the information on why they were # locked out in the first place! # #trust-info-url http://www.example.com/why_we_block.html #trust-info-url http://www.example.com/what_we_allow.html # # 1.3. admin-address # =================== # # Specifies: # # An email address to reach the Privoxy administrator. # # Type of value: # # Email address # # Default value: # # Unset # # Effect if unset: # # No email address is displayed on error pages and the CGI user # interface. # # Notes: # # If both admin-address and proxy-info-url are unset, the whole # "Local Privoxy Support" box on all generated pages will not be # shown. # #admin-address privoxy-admin@example.com admin-address root@localhost # # 1.4. proxy-info-url # ==================== # # Specifies: # # A URL to documentation about the local Privoxy setup, # configuration or policies. # # Type of value: # # URL # # Default value: # # Unset # # Effect if unset: # # No link to local documentation is displayed on error pages and # the CGI user interface. # # Notes: # # If both admin-address and proxy-info-url are unset, the whole # "Local Privoxy Support" box on all generated pages will not be # shown. # # This URL shouldn't be blocked ;-) # #proxy-info-url http://www.example.com/proxy-service.html # # 2. CONFIGURATION AND LOG FILE LOCATIONS # ======================================== # # Privoxy can (and normally does) use a number of other files for # additional configuration, help and logging. This section of the # configuration file tells Privoxy where to find those other files. # # The user running Privoxy, must have read permission for all # configuration files, and write permission to any files that would # be modified, such as log files and actions files. # # # 2.1. confdir # ============= # # Specifies: # # The directory where the other configuration files are located. # # Type of value: # # Path name # # Default value: # # /etc/privoxy (Unix) or Privoxy installation dir (Windows) # # Effect if unset: # # Mandatory # # Notes: # # No trailing "/", please. # confdir /opt/local/etc/privoxy # # 2.2. templdir # ============== # # Specifies: # # An alternative directory where the templates are loaded from. # # Type of value: # # Path name # # Default value: # # unset # # Effect if unset: # # The templates are assumed to be located in confdir/template. # # Notes: # # Privoxy's original templates are usually overwritten with each # update. Use this option to relocate customized templates that # should be kept. As template variables might change between # updates, you shouldn't expect templates to work with Privoxy # releases other than the one they were part of, though. # #templdir . # # 2.3. temporary-directory # ========================= # # Specifies: # # A directory where Privoxy can create temporary files. # # Type of value: # # Path name # # Default value: # # unset # # Effect if unset: # # No temporary files are created, external filters don't work. # # Notes: # # To execute external filters, Privoxy has to create temporary # files. This directive specifies the directory the temporary # files should be written to. # # It should be a directory only Privoxy (and trusted users) can # access. # #temporary-directory . # # 2.4. logdir # ============ # # Specifies: # # The directory where all logging takes place (i.e. where the # logfile is located). # # Type of value: # # Path name # # Default value: # # /var/log/privoxy (Unix) or Privoxy installation dir (Windows) # # Effect if unset: # # Mandatory # # Notes: # # No trailing "/", please. # logdir /opt/local/var/log/privoxy # # 2.5. actionsfile # ================= # # Specifies: # # The actions file(s) to use # # Type of value: # # Complete file name, relative to confdir # # Default values: # # match-all.action # Actions that are applied to all sites and maybe overruled later on. # # default.action # Main actions file # # user.action # User customizations # # Effect if unset: # # No actions are taken at all. More or less neutral proxying. # # Notes: # # Multiple actionsfile lines are permitted, and are in fact # recommended! # # The default values are default.action, which is the "main" # actions file maintained by the developers, and user.action, # where you can make your personal additions. # # Actions files contain all the per site and per URL # configuration for ad blocking, cookie management, privacy # considerations, etc. # actionsfile match-all.action # Actions that are applied to all sites and maybe overruled later on. actionsfile default.action # Main actions file actionsfile user.action # User customizations actionsfile /usr/local/etc/adblock2privoxy/privoxy/ab2p.system.action actionsfile /usr/local/etc/adblock2privoxy/privoxy/ab2p.action # # 2.6. filterfile # ================ # # Specifies: # # The filter file(s) to use # # Type of value: # # File name, relative to confdir # # Default value: # # default.filter (Unix) or default.filter.txt (Windows) # # Effect if unset: # # No textual content filtering takes place, i.e. all +filter{name} # actions in the actions files are turned neutral. # # Notes: # # Multiple filterfile lines are permitted. # # The filter files contain content modification rules that use # regular expressions. These rules permit powerful changes on # the content of Web pages, and optionally the headers as well, # e.g., you could try to disable your favorite JavaScript # annoyances, re-write the actual displayed text, or just have # some fun playing buzzword bingo with web pages. # # The +filter{name} actions rely on the relevant filter (name) # to be defined in a filter file! # # A pre-defined filter file called default.filter that contains # a number of useful filters for common problems is included in # the distribution. See the section on the filter action for a # list. # # It is recommended to place any locally adapted filters into a # separate file, such as user.filter. # filterfile default.filter filterfile user.filter # User customizations filterfile /usr/local/etc/adblock2privoxy/privoxy/ab2p.system.filter filterfile /usr/local/etc/adblock2privoxy/privoxy/ab2p.filter # # 2.7. logfile # ============= # # Specifies: # # The log file to use # # Type of value: # # File name, relative to logdir # # Default value: # # Unset (commented out). When activated: logfile (Unix) or # privoxy.log (Windows). # # Effect if unset: # # No logfile is written. # # Notes: # # The logfile is where all logging and error messages are # written. The level of detail and number of messages are set # with the debug option (see below). The logfile can be useful # for tracking down a problem with Privoxy (e.g., it's not # blocking an ad you think it should block) and it can help you # to monitor what your browser is doing. # # Depending on the debug options below, the logfile may be a # privacy risk if third parties can get access to it. As most # users will never look at it, Privoxy only logs fatal errors by # default. # # For most troubleshooting purposes, you will have to change # that, please refer to the debugging section for details. # # Any log files must be writable by whatever user Privoxy is # being run as (on Unix, default user id is "privoxy"). # # To prevent the logfile from growing indefinitely, it is # recommended to periodically rotate or shorten it. Many # operating systems support log rotation out of the box, some # require additional software to do it. For details, please # refer to the documentation for your operating system. # logfile logfile # # 2.8. trustfile # =============== # # Specifies: # # The name of the trust file to use # # Type of value: # # File name, relative to confdir # # Default value: # # Unset (commented out). When activated: trust (Unix) or # trust.txt (Windows) # # Effect if unset: # # The entire trust mechanism is disabled. # # Notes: # # The trust mechanism is an experimental feature for building # white-lists and should be used with care. It is NOT # recommended for the casual user. # # If you specify a trust file, Privoxy will only allow access to # sites that are specified in the trustfile. Sites can be listed # in one of two ways: # # Prepending a ~ character limits access to this site only (and # any sub-paths within this site), e.g. ~www.example.com allows # access to ~www.example.com/features/news.html, etc. # # Or, you can designate sites as trusted referrers, by # prepending the name with a + character. The effect is that # access to untrusted sites will be granted -- but only if a # link from this trusted referrer was used to get there. The # link target will then be added to the "trustfile" so that # future, direct accesses will be granted. Sites added via this # mechanism do not become trusted referrers themselves (i.e. # they are added with a ~ designation). There is a limit of 512 # such entries, after which new entries will not be made. # # If you use the + operator in the trust file, it may grow # considerably over time. # # It is recommended that Privoxy be compiled with the # --disable-force, --disable-toggle and --disable-editor # options, if this feature is to be used. # # Possible applications include limiting Internet access for # children. # #trustfile trust # # 3. DEBUGGING # ============= # # These options are mainly useful when tracing a problem. Note that # you might also want to invoke Privoxy with the --no-daemon command # line option when debugging. # # # 3.1. debug # =========== # # Specifies: # # Key values that determine what information gets logged. # # Type of value: # # Integer values # # Default value: # # 0 (i.e.: only fatal errors (that cause Privoxy to exit) are # logged) # # Effect if unset: # # Default value is used (see above). # # Notes: # # The available debug levels are: # # debug 1 # Log the destination for each request Privoxy let through. See also debug 1024. # debug 2 # show each connection status # debug 4 # show I/O status # debug 8 # show header parsing # debug 16 # log all data written to the network # debug 32 # debug force feature # debug 64 # debug regular expression filters # debug 128 # debug redirects # debug 256 # debug GIF de-animation # debug 512 # Common Log Format # debug 1024 # Log the destination for requests Privoxy didn't let through, and the reason why. # debug 2048 # CGI user interface # debug 4096 # Startup banner and warnings. # debug 8192 # Non-fatal errors # debug 32768 # log all data read from the network # debug 65536 # Log the applying actions # # To select multiple debug levels, you can either add them or # use multiple debug lines. # # A debug level of 1 is informative because it will show you # each request as it happens. 1, 1024, 4096 and 8192 are # recommended so that you will notice when things go wrong. The # other levels are probably only of interest if you are hunting # down a specific problem. They can produce a hell of an output # (especially 16). # # If you are used to the more verbose settings, simply enable # the debug lines below again. # # If you want to use pure CLF (Common Log Format), you should # set "debug 512" ONLY and not enable anything else. # # Privoxy has a hard-coded limit for the length of log messages. # If it's reached, messages are logged truncated and marked with # "... [too long, truncated]". # # Please don't file any support requests without trying to # reproduce the problem with increased debug level first. Once # you read the log messages, you may even be able to solve the # problem on your own. # #debug 1 # Log the destination for each request Privoxy let through. See also debug 1024. #debug 1024 # Actions that are applied to all sites and maybe overruled later on. #debug 4096 # Startup banner and warnings #debug 8192 # Non-fatal errors # # 3.2. single-threaded # ===================== # # Specifies: # # Whether to run only one server thread. # # Type of value: # # 1 or 0 # # Default value: # # 0 # # Effect if unset: # # Multi-threaded (or, where unavailable: forked) operation, i.e. # the ability to serve multiple requests simultaneously. # # Notes: # # This option is only there for debugging purposes. It will # drastically reduce performance. # #single-threaded 1 # # 3.3. hostname # ============== # # Specifies: # # The hostname shown on the CGI pages. # # Type of value: # # Text # # Default value: # # Unset # # Effect if unset: # # The hostname provided by the operating system is used. # # Notes: # # On some misconfigured systems resolving the hostname fails or # takes too much time and slows Privoxy down. Setting a fixed # hostname works around the problem. # # In other circumstances it might be desirable to show a # hostname other than the one returned by the operating system. # For example if the system has several different hostnames and # you don't want to use the first one. # # Note that Privoxy does not validate the specified hostname # value. # hostname localhost # # 4. ACCESS CONTROL AND SECURITY # =============================== # # This section of the config file controls the security-relevant # aspects of Privoxy's configuration. # # # 4.1. listen-address # ==================== # # Specifies: # # The address and TCP port on which Privoxy will listen for # client requests. # # Type of value: # # [IP-Address]:Port # # [Hostname]:Port # # Default value: # # 127.0.0.1:8118 # # Effect if unset: # # Bind to 127.0.0.1 (IPv4 localhost), port 8118. This is # suitable and recommended for home users who run Privoxy on the # same machine as their browser. # # Notes: # # You will need to configure your browser(s) to this proxy # address and port. # # If you already have another service running on port 8118, or # if you want to serve requests from other machines (e.g. on # your local network) as well, you will need to override the # default. # # You can use this statement multiple times to make Privoxy # listen on more ports or more IP addresses. Suitable if your # operating system does not support sharing IPv6 and IPv4 # protocols on the same socket. # # If a hostname is used instead of an IP address, Privoxy will # try to resolve it to an IP address and if there are multiple, # use the first one returned. # # If the address for the hostname isn't already known on the # system (for example because it's in /etc/hostname), this may # result in DNS traffic. # # If the specified address isn't available on the system, or if # the hostname can't be resolved, Privoxy will fail to start. # # IPv6 addresses containing colons have to be quoted by # brackets. They can only be used if Privoxy has been compiled # with IPv6 support. If you aren't sure if your version supports # it, have a look at http://config.privoxy.org/show-status. # # Some operating systems will prefer IPv6 to IPv4 addresses even # if the system has no IPv6 connectivity which is usually not # expected by the user. Some even rely on DNS to resolve # localhost which mean the "localhost" address used may not # actually be local. # # It is therefore recommended to explicitly configure the # intended IP address instead of relying on the operating # system, unless there's a strong reason not to. # # If you leave out the address, Privoxy will bind to all IPv4 # interfaces (addresses) on your machine and may become # reachable from the Internet and/or the local network. Be aware # that some GNU/Linux distributions modify that behaviour # without updating the documentation. Check for non-standard # patches if your Privoxy version behaves differently. # # If you configure Privoxy to be reachable from the network, # consider using access control lists (ACL's, see below), and/or # a firewall. # # If you open Privoxy to untrusted users, you will also want to # make sure that the following actions are disabled: # enable-edit-actions and enable-remote-toggle # # Example: # # Suppose you are running Privoxy on a machine which has the # address 192.168.0.1 on your local private network # (192.168.0.0) and has another outside connection with a # different address. You want it to serve requests from inside # only: # # listen-address 192.168.0.1:8118 # # Suppose you are running Privoxy on an IPv6-capable machine and # you want it to listen on the IPv6 address of the loopback # device: # # listen-address [::1]:8118 # listen-address 127.0.0.1:8118 # # 4.2. toggle # ============ # # Specifies: # # Initial state of "toggle" status # # Type of value: # # 1 or 0 # # Default value: # # 1 # # Effect if unset: # # Act as if toggled on # # Notes: # # If set to 0, Privoxy will start in "toggled off" mode, i.e. # mostly behave like a normal, content-neutral proxy with both # ad blocking and content filtering disabled. See # enable-remote-toggle below. # toggle 1 # # 4.3. enable-remote-toggle # ========================== # # Specifies: # # Whether or not the web-based toggle feature may be used # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # The web-based toggle feature is disabled. # # Notes: # # When toggled off, Privoxy mostly acts like a normal, # content-neutral proxy, i.e. doesn't block ads or filter # content. # # Access to the toggle feature can not be controlled separately # by "ACLs" or HTTP authentication, so that everybody who can # access Privoxy (see "ACLs" and listen-address above) can # toggle it for all users. So this option is not recommended for # multi-user environments with untrusted users. # # Note that malicious client side code (e.g Java) is also # capable of using this option. # # As a lot of Privoxy users don't read documentation, this # feature is disabled by default. # # Note that you must have compiled Privoxy with support for this # feature, otherwise this option has no effect. # enable-remote-toggle 0 # # 4.4. enable-remote-http-toggle # =============================== # # Specifies: # # Whether or not Privoxy recognizes special HTTP headers to # change its behaviour. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Privoxy ignores special HTTP headers. # # Notes: # # When toggled on, the client can change Privoxy's behaviour by # setting special HTTP headers. Currently the only supported # special header is "X-Filter: No", to disable filtering for the # ongoing request, even if it is enabled in one of the action # files. # # This feature is disabled by default. If you are using Privoxy # in a environment with trusted clients, you may enable this # feature at your discretion. Note that malicious client side # code (e.g Java) is also capable of using this feature. # # This option will be removed in future releases as it has been # obsoleted by the more general header taggers. # enable-remote-http-toggle 0 # # 4.5. enable-edit-actions # ========================= # # Specifies: # # Whether or not the web-based actions file editor may be used # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # The web-based actions file editor is disabled. # # Notes: # # Access to the editor can not be controlled separately by # "ACLs" or HTTP authentication, so that everybody who can # access Privoxy (see "ACLs" and listen-address above) can # modify its configuration for all users. # # This option is not recommended for environments with untrusted # users and as a lot of Privoxy users don't read documentation, # this feature is disabled by default. # # Note that malicious client side code (e.g Java) is also # capable of using the actions editor and you shouldn't enable # this options unless you understand the consequences and are # sure your browser is configured correctly. # # Note that you must have compiled Privoxy with support for this # feature, otherwise this option has no effect. # enable-edit-actions 0 # # 4.6. enforce-blocks # ==================== # # Specifies: # # Whether the user is allowed to ignore blocks and can "go there # anyway". # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Blocks are not enforced. # # Notes: # # Privoxy is mainly used to block and filter requests as a # service to the user, for example to block ads and other junk # that clogs the pipes. Privoxy's configuration isn't perfect # and sometimes innocent pages are blocked. In this situation it # makes sense to allow the user to enforce the request and have # Privoxy ignore the block. # # In the default configuration Privoxy's "Blocked" page contains # a "go there anyway" link to adds a special string (the force # prefix) to the request URL. If that link is used, Privoxy will # detect the force prefix, remove it again and let the request # pass. # # Of course Privoxy can also be used to enforce a network # policy. In that case the user obviously should not be able to # bypass any blocks, and that's what the "enforce-blocks" option # is for. If it's enabled, Privoxy hides the "go there anyway" # link. If the user adds the force prefix by hand, it will not # be accepted and the circumvention attempt is logged. # # Examples: # # enforce-blocks 1 # enforce-blocks 0 # # 4.7. ACLs: permit-access and deny-access # ========================================= # # Specifies: # # Who can access what. # # Type of value: # # src_addr[:port][/src_masklen] [dst_addr[:port][/dst_masklen]] # # Where src_addr and dst_addr are IPv4 addresses in dotted # decimal notation or valid DNS names, port is a port number, # and src_masklen and dst_masklen are subnet masks in CIDR # notation, i.e. integer values from 2 to 30 representing the # length (in bits) of the network address. The masks and the # whole destination part are optional. # # If your system implements RFC 3493, then src_addr and dst_addr # can be IPv6 addresses delimeted by brackets, port can be a # number or a service name, and src_masklen and dst_masklen can # be a number from 0 to 128. # # Default value: # # Unset # # If no port is specified, any port will match. If no # src_masklen or src_masklen is given, the complete IP address # has to match (i.e. 32 bits for IPv4 and 128 bits for IPv6). # # Effect if unset: # # Don't restrict access further than implied by listen-address # # Notes: # # Access controls are included at the request of ISPs and # systems administrators, and are not usually needed by # individual users. For a typical home user, it will normally # suffice to ensure that Privoxy only listens on the localhost # (127.0.0.1) or internal (home) network address by means of the # listen-address option. # # Please see the warnings in the FAQ that Privoxy is not # intended to be a substitute for a firewall or to encourage # anyone to defer addressing basic security weaknesses. # # Multiple ACL lines are OK. If any ACLs are specified, Privoxy # only talks to IP addresses that match at least one # permit-access line and don't match any subsequent deny-access # line. In other words, the last match wins, with the default # being deny-access. # # If Privoxy is using a forwarder (see forward below) for a # particular destination URL, the dst_addr that is examined is # the address of the forwarder and NOT the address of the # ultimate target. This is necessary because it may be # impossible for the local Privoxy to determine the IP address # of the ultimate target (that's often what gateways are used # for). # # You should prefer using IP addresses over DNS names, because # the address lookups take time. All DNS names must resolve! You # can not use domain patterns like "*.org" or partial domain # names. If a DNS name resolves to multiple IP addresses, only # the first one is used. # # Some systems allow IPv4 clients to connect to IPv6 server # sockets. Then the client's IPv4 address will be translated by # the system into IPv6 address space with special prefix # ::ffff:0:0/96 (so called IPv4 mapped IPv6 address). Privoxy # can handle it and maps such ACL addresses automatically. # # Denying access to particular sites by ACL may have undesired # side effects if the site in question is hosted on a machine # which also hosts other sites (most sites are). # # Examples: # # Explicitly define the default behavior if no ACL and # listen-address are set: "localhost" is OK. The absence of a # dst_addr implies that all destination addresses are OK: # # permit-access localhost # # Allow any host on the same class C subnet as www.privoxy.org # access to nothing but www.example.com (or other domains hosted # on the same system): # # permit-access www.privoxy.org/24 www.example.com/32 # # Allow access from any host on the 26-bit subnet 192.168.45.64 # to anywhere, with the exception that 192.168.45.73 may not # access the IP address behind www.dirty-stuff.example.com: # # permit-access 192.168.45.64/26 # deny-access 192.168.45.73 www.dirty-stuff.example.com # # Allow access from the IPv4 network 192.0.2.0/24 even if # listening on an IPv6 wild card address (not supported on all # platforms): # # permit-access 192.0.2.0/24 # # This is equivalent to the following line even if listening on # an IPv4 address (not supported on all platforms): # # permit-access [::ffff:192.0.2.0]/120 # # # 4.8. buffer-limit # ================== # # Specifies: # # Maximum size of the buffer for content filtering. # # Type of value: # # Size in Kbytes # # Default value: # # 4096 # # Effect if unset: # # Use a 4MB (4096 KB) limit. # # Notes: # # For content filtering, i.e. the +filter and +deanimate-gif # actions, it is necessary that Privoxy buffers the entire # document body. This can be potentially dangerous, since a # server could just keep sending data indefinitely and wait for # your RAM to exhaust -- with nasty consequences. Hence this # option. # # When a document buffer size reaches the buffer-limit, it is # flushed to the client unfiltered and no further attempt to # filter the rest of the document is made. Remember that there # may be multiple threads running, which might require up to # buffer-limit Kbytes each, unless you have enabled # "single-threaded" above. # buffer-limit 4096 # # 4.9. enable-proxy-authentication-forwarding # ============================================ # # Specifies: # # Whether or not proxy authentication through Privoxy should # work. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Proxy authentication headers are removed. # # Notes: # # Privoxy itself does not support proxy authentication, but can # allow clients to authenticate against Privoxy's parent proxy. # # By default Privoxy (3.0.21 and later) don't do that and remove # Proxy-Authorization headers in requests and Proxy-Authenticate # headers in responses to make it harder for malicious sites to # trick inexperienced users into providing login information. # # If this option is enabled the headers are forwarded. # # Enabling this option is not recommended if there is no parent # proxy that requires authentication or if the local network # between Privoxy and the parent proxy isn't trustworthy. If # proxy authentication is only required for some requests, it is # recommended to use a client header filter to remove the # authentication headers for requests where they aren't needed. # enable-proxy-authentication-forwarding 0 # # 5. FORWARDING # ============== # # This feature allows routing of HTTP requests through a chain of # multiple proxies. # # Forwarding can be used to chain Privoxy with a caching proxy to # speed up browsing. Using a parent proxy may also be necessary if # the machine that Privoxy runs on has no direct Internet access. # # Note that parent proxies can severely decrease your privacy level. # For example a parent proxy could add your IP address to the # request headers and if it's a caching proxy it may add the "Etag" # header to revalidation requests again, even though you configured # Privoxy to remove it. It may also ignore Privoxy's header time # randomization and use the original values which could be used by # the server as cookie replacement to track your steps between # visits. # # Also specified here are SOCKS proxies. Privoxy supports the SOCKS # 4 and SOCKS 4A protocols. # # # 5.1. forward # ============= # # Specifies: # # To which parent HTTP proxy specific requests should be routed. # # Type of value: # # target_pattern http_parent[:port] # # where target_pattern is a URL pattern that specifies to which # requests (i.e. URLs) this forward rule shall apply. Use / to # denote "all URLs". http_parent[:port] is the DNS name or IP # address of the parent HTTP proxy through which the requests # should be forwarded, optionally followed by its listening port # (default: 8000). Use a single dot (.) to denote "no # forwarding". # # Default value: # # Unset # # Effect if unset: # # Don't use parent HTTP proxies. # # Notes: # # If http_parent is ".", then requests are not forwarded to # another HTTP proxy but are made directly to the web servers. # # http_parent can be a numerical IPv6 address (if RFC 3493 is # implemented). To prevent clashes with the port delimiter, the # whole IP address has to be put into brackets. On the other # hand a target_pattern containing an IPv6 address has to be put # into angle brackets (normal brackets are reserved for regular # expressions already). # # Multiple lines are OK, they are checked in sequence, and the # last match wins. # # Examples: # # Everything goes to an example parent proxy, except SSL on port # 443 (which it doesn't handle): # # forward / parent-proxy.example.org:8080 # forward :443 . # # Everything goes to our example ISP's caching proxy, except for # requests to that ISP's sites: # # forward / caching-proxy.isp.example.net:8000 # forward .isp.example.net . # # Parent proxy specified by an IPv6 address: # # forward / [2001:DB8::1]:8000 # # Suppose your parent proxy doesn't support IPv6: # # forward / parent-proxy.example.org:8000 # forward ipv6-server.example.org . # forward <[2-3][0-9a-f][0-9a-f][0-9a-f]:*> . # # # See http://www.christianschenk.org/blog/enhancing-your-privacy-using-squid-and-privoxy/ forward / . forward :443 . # I2P #forward .i2p localhost:4443 # 5.2. forward-socks4, forward-socks4a, forward-socks5 and forward-socks5t # ========================================================================= # # Specifies: # # Through which SOCKS proxy (and optionally to which parent HTTP # proxy) specific requests should be routed. # # Type of value: # # target_pattern socks_proxy[:port] http_parent[:port] # # where target_pattern is a URL pattern that specifies to which # requests (i.e. URLs) this forward rule shall apply. Use / to # denote "all URLs". http_parent and socks_proxy are IP # addresses in dotted decimal notation or valid DNS names ( # http_parent may be "." to denote "no HTTP forwarding"), and # the optional port parameters are TCP ports, i.e. integer # values from 1 to 65535 # # Default value: # # Unset # # Effect if unset: # # Don't use SOCKS proxies. # # Notes: # # Multiple lines are OK, they are checked in sequence, and the # last match wins. # # The difference between forward-socks4 and forward-socks4a is # that in the SOCKS 4A protocol, the DNS resolution of the # target hostname happens on the SOCKS server, while in SOCKS 4 # it happens locally. # # With forward-socks5 the DNS resolution will happen on the # remote server as well. # # forward-socks5t works like vanilla forward-socks5 but lets # Privoxy additionally use Tor-specific SOCKS extensions. # Currently the only supported SOCKS extension is optimistic # data which can reduce the latency for the first request made # on a newly created connection. # # socks_proxy and http_parent can be a numerical IPv6 address # (if RFC 3493 is implemented). To prevent clashes with the port # delimiter, the whole IP address has to be put into brackets. # On the other hand a target_pattern containing an IPv6 address # has to be put into angle brackets (normal brackets are # reserved for regular expressions already). # # If http_parent is ".", then requests are not forwarded to # another HTTP proxy but are made (HTTP-wise) directly to the # web servers, albeit through a SOCKS proxy. # # Examples: # # From the company example.com, direct connections are made to # all "internal" domains, but everything outbound goes through # their ISP's proxy by way of example.com's corporate SOCKS 4A # gateway to the Internet. # # forward-socks4a / socks-gw.example.com:1080 www-cache.isp.example.net:8080 # forward .example.com . # # A rule that uses a SOCKS 4 gateway for all destinations but no # HTTP parent looks like this: # # forward-socks4 / socks-gw.example.com:1080 . # # To chain Privoxy and Tor, both running on the same system, you # would use something like: # # forward-socks5t / 127.0.0.1:9050 . # # Note that if you got Tor through one of the bundles, you may # have to change the port from 9050 to 9150 (or even another # one). For details, please check the documentation on the Tor # website. # # The public Tor network can't be used to reach your local # network, if you need to access local servers you therefore # might want to make some exceptions: # # forward 192.168.*.*/ . # forward 10.*.*.*/ . # forward 127.*.*.*/ . # # Unencrypted connections to systems in these address ranges # will be as (un)secure as the local network is, but the # alternative is that you can't reach the local network through # Privoxy at all. Of course this may actually be desired and # there is no reason to make these exceptions if you aren't sure # you need them. # # If you also want to be able to reach servers in your local # network by using their names, you will need additional # exceptions that look like this: # # forward localhost/ . # # # 5.3. forwarded-connect-retries # =============================== # # Specifies: # # How often Privoxy retries if a forwarded connection request # fails. # # Type of value: # # Number of retries. # # Default value: # # 0 # # Effect if unset: # # Connections forwarded through other proxies are treated like # direct connections and no retry attempts are made. # # Notes: # # forwarded-connect-retries is mainly interesting for socks4a # connections, where Privoxy can't detect why the connections # failed. The connection might have failed because of a DNS # timeout in which case a retry makes sense, but it might also # have failed because the server doesn't exist or isn't # reachable. In this case the retry will just delay the # appearance of Privoxy's error message. # # Note that in the context of this option, "forwarded # connections" includes all connections that Privoxy forwards # through other proxies. This option is not limited to the HTTP # CONNECT method. # # Only use this option, if you are getting lots of # forwarding-related error messages that go away when you try # again manually. Start with a small value and check Privoxy's # logfile from time to time, to see how many retries are usually # needed. # # Examples: # # forwarded-connect-retries 1 # forwarded-connect-retries 0 # # 6. MISCELLANEOUS # ================= # # 6.1. accept-intercepted-requests # ================================= # # Specifies: # # Whether intercepted requests should be treated as valid. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Only proxy requests are accepted, intercepted requests are # treated as invalid. # # Notes: # # If you don't trust your clients and want to force them to use # Privoxy, enable this option and configure your packet filter # to redirect outgoing HTTP connections into Privoxy. # # Note that intercepting encrypted connections (HTTPS) isn't # supported. # # Make sure that Privoxy's own requests aren't redirected as # well. Additionally take care that Privoxy can't intentionally # connect to itself, otherwise you could run into redirection # loops if Privoxy's listening port is reachable by the outside # or an attacker has access to the pages you visit. # # If you are running Privoxy as intercepting proxy without being # able to intercept all client requests you may want to adjust # the CGI templates to make sure they don't reference content # from config.privoxy.org. # # Examples: # # accept-intercepted-requests 1 # accept-intercepted-requests 0 # # 6.2. allow-cgi-request-crunching # ================================= # # Specifies: # # Whether requests to Privoxy's CGI pages can be blocked or # redirected. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Privoxy ignores block and redirect actions for its CGI pages. # # Notes: # # By default Privoxy ignores block or redirect actions for its # CGI pages. Intercepting these requests can be useful in # multi-user setups to implement fine-grained access control, # but it can also render the complete web interface useless and # make debugging problems painful if done without care. # # Don't enable this option unless you're sure that you really # need it. # # Examples: # # allow-cgi-request-crunching 1 # allow-cgi-request-crunching 0 # # 6.3. split-large-forms # ======================= # # Specifies: # # Whether the CGI interface should stay compatible with broken # HTTP clients. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # The CGI form generate long GET URLs. # # Notes: # # Privoxy's CGI forms can lead to rather long URLs. This isn't a # problem as far as the HTTP standard is concerned, but it can # confuse clients with arbitrary URL length limitations. # # Enabling split-large-forms causes Privoxy to divide big forms # into smaller ones to keep the URL length down. It makes # editing a lot less convenient and you can no longer submit all # changes at once, but at least it works around this browser # bug. # # If you don't notice any editing problems, there is no reason # to enable this option, but if one of the submit buttons # appears to be broken, you should give it a try. # # Examples: # # split-large-forms 1 # split-large-forms 0 # # 6.4. keep-alive-timeout # ======================== # # Specifies: # # Number of seconds after which an open connection will no # longer be reused. # # Type of value: # # Time in seconds. # # Default value: # # None # # Effect if unset: # # Connections are not kept alive. # # Notes: # # This option allows clients to keep the connection to Privoxy # alive. If the server supports it, Privoxy will keep the # connection to the server alive as well. Under certain # circumstances this may result in speed-ups. # # By default, Privoxy will close the connection to the server if # the client connection gets closed, or if the specified timeout # has been reached without a new request coming in. This # behaviour can be changed with the connection-sharing option. # # This option has no effect if Privoxy has been compiled without # keep-alive support. # # Note that a timeout of five seconds as used in the default # configuration file significantly decreases the number of # connections that will be reused. The value is used because # some browsers limit the number of connections they open to a # single host and apply the same limit to proxies. This can # result in a single website "grabbing" all the connections the # browser allows, which means connections to other websites # can't be opened until the connections currently in use time # out. # # Several users have reported this as a Privoxy bug, so the # default value has been reduced. Consider increasing it to 300 # seconds or even more if you think your browser can handle it. # If your browser appears to be hanging, it probably can't. # # Examples: # # keep-alive-timeout 300 # keep-alive-timeout 300 # # 6.5. tolerate-pipelining # ========================= # # Specifies: # # Whether or not pipelined requests should be served. # # Type of value: # # 0 or 1. # # Default value: # # None # # Effect if unset: # # If Privoxy receives more than one request at once, it # terminates the client connection after serving the first one. # # Notes: # # Privoxy currently doesn't pipeline outgoing requests, thus # allowing pipelining on the client connection is not guaranteed # to improve the performance. # # By default Privoxy tries to discourage clients from pipelining # by discarding aggressively pipelined requests, which forces # the client to resend them through a new connection. # # This option lets Privoxy tolerate pipelining. Whether or not # that improves performance mainly depends on the client # configuration. # # If you are seeing problems with pages not properly loading, # disabling this option could work around the problem. # # Examples: # # tolerate-pipelining 1 # #tolerate-pipelining 1 # # 6.6. default-server-timeout # ============================ # # Specifies: # # Assumed server-side keep-alive timeout if not specified by the # server. # # Type of value: # # Time in seconds. # # Default value: # # None # # Effect if unset: # # Connections for which the server didn't specify the keep-alive # timeout are not reused. # # Notes: # # Enabling this option significantly increases the number of # connections that are reused, provided the keep-alive-timeout # option is also enabled. # # While it also increases the number of connections problems # when Privoxy tries to reuse a connection that already has been # closed on the server side, or is closed while Privoxy is # trying to reuse it, this should only be a problem if it # happens for the first request sent by the client. If it # happens for requests on reused client connections, Privoxy # will simply close the connection and the client is supposed to # retry the request without bothering the user. # # Enabling this option is therefore only recommended if the # connection-sharing option is disabled. # # It is an error to specify a value larger than the # keep-alive-timeout value. # # This option has no effect if Privoxy has been compiled without # keep-alive support. # # Examples: # # default-server-timeout 60 # default-server-timeout 60 # # 6.7. connection-sharing # ======================== # # Specifies: # # Whether or not outgoing connections that have been kept alive # should be shared between different incoming connections. # # Type of value: # # 0 or 1 # # Default value: # # None # # Effect if unset: # # Connections are not shared. # # Notes: # # This option has no effect if Privoxy has been compiled without # keep-alive support, or if it's disabled. # # Notes: # # Note that reusing connections doesn't necessary cause # speedups. There are also a few privacy implications you should # be aware of. # # If this option is effective, outgoing connections are shared # between clients (if there are more than one) and closing the # browser that initiated the outgoing connection does no longer # affect the connection between Privoxy and the server unless # the client's request hasn't been completed yet. # # If the outgoing connection is idle, it will not be closed # until either Privoxy's or the server's timeout is reached. # While it's open, the server knows that the system running # Privoxy is still there. # # If there are more than one client (maybe even belonging to # multiple users), they will be able to reuse each others # connections. This is potentially dangerous in case of # authentication schemes like NTLM where only the connection is # authenticated, instead of requiring authentication for each # request. # # If there is only a single client, and if said client can keep # connections alive on its own, enabling this option has next to # no effect. If the client doesn't support connection # keep-alive, enabling this option may make sense as it allows # Privoxy to keep outgoing connections alive even if the client # itself doesn't support it. # # You should also be aware that enabling this option increases # the likelihood of getting the "No server or forwarder data" # error message, especially if you are using a slow connection # to the Internet. # # This option should only be used by experienced users who # understand the risks and can weight them against the benefits. # # Examples: # # connection-sharing 1 # connection-sharing 0 # # 6.8. socket-timeout # ==================== # # Specifies: # # Number of seconds after which a socket times out if no data is # received. # # Type of value: # # Time in seconds. # # Default value: # # None # # Effect if unset: # # A default value of 300 seconds is used. # # Notes: # # The default is quite high and you probably want to reduce it. # If you aren't using an occasionally slow proxy like Tor, # reducing it to a few seconds should be fine. # # Examples: # # socket-timeout 300 # socket-timeout 60 # # 6.9. max-client-connections # ============================ # # Specifies: # # Maximum number of client connections that will be served. # # Type of value: # # Positive number. # # Default value: # # 128 # # Effect if unset: # # Connections are served until a resource limit is reached. # # Notes: # # Privoxy creates one thread (or process) for every incoming # client connection that isn't rejected based on the access # control settings. # # If the system is powerful enough, Privoxy can theoretically # deal with several hundred (or thousand) connections at the # same time, but some operating systems enforce resource limits # by shutting down offending processes and their default limits # may be below the ones Privoxy would require under heavy load. # # Configuring Privoxy to enforce a connection limit below the # thread or process limit used by the operating system makes # sure this doesn't happen. Simply increasing the operating # system's limit would work too, but if Privoxy isn't the only # application running on the system, you may actually want to # limit the resources used by Privoxy. # # If Privoxy is only used by a single trusted user, limiting the # number of client connections is probably unnecessary. If there # are multiple possibly untrusted users you probably still want # to additionally use a packet filter to limit the maximal # number of incoming connections per client. Otherwise a # malicious user could intentionally create a high number of # connections to prevent other users from using Privoxy. # # Obviously using this option only makes sense if you choose a # limit below the one enforced by the operating system. # # One most POSIX-compliant systems Privoxy can't properly deal # with more than FD_SETSIZE file descriptors at the same time # and has to reject connections if the limit is reached. This # will likely change in a future version, but currently this # limit can't be increased without recompiling Privoxy with a # different FD_SETSIZE limit. # # Examples: # # max-client-connections 256 # max-client-connections 256 # # 6.10. handle-as-empty-doc-returns-ok # ===================================== # # Specifies: # # The status code Privoxy returns for pages blocked with # +handle-as-empty-document. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Privoxy returns a status 403(forbidden) for all blocked pages. # # Effect if set: # # Privoxy returns a status 200(OK) for pages blocked with # +handle-as-empty-document and a status 403(Forbidden) for all # other blocked pages. # # Notes: # # This directive was added as a work-around for Firefox bug # 492459: "Websites are no longer rendered if SSL requests for # JavaScripts are blocked by a proxy." # (https://bugzilla.mozilla.org/show_bug.cgi?id=492459), the bug # has been fixed for quite some time, but this directive is also # useful to make it harder for websites to detect whether or not # resources are being blocked. # #handle-as-empty-doc-returns-ok 1 # # 6.11. enable-compression # ========================= # # Specifies: # # Whether or not buffered content is compressed before delivery. # # Type of value: # # 0 or 1 # # Default value: # # 0 # # Effect if unset: # # Privoxy does not compress buffered content. # # Effect if set: # # Privoxy compresses buffered content before delivering it to # the client, provided the client supports it. # # Notes: # # This directive is only supported if Privoxy has been compiled # with FEATURE_COMPRESSION, which should not to be confused with # FEATURE_ZLIB. # # Compressing buffered content is mainly useful if Privoxy and # the client are running on different systems. If they are # running on the same system, enabling compression is likely to # slow things down. If you didn't measure otherwise, you should # assume that it does and keep this option disabled. # # Privoxy will not compress buffered content below a certain # length. # #enable-compression 1 # # 6.12. compression-level # ======================== # # Specifies: # # The compression level that is passed to the zlib library when # compressing buffered content. # # Type of value: # # Positive number ranging from 0 to 9. # # Default value: # # 1 # # Notes: # # Compressing the data more takes usually longer than # compressing it less or not compressing it at all. Which level # is best depends on the connection between Privoxy and the # client. If you can't be bothered to benchmark it for yourself, # you should stick with the default and keep compression # disabled. # # If compression is disabled, the compression level is # irrelevant. # # Examples: # # # Best speed (compared to the other levels) # compression-level 1 # # # Best compression # compression-level 9 # # # No compression. Only useful for testing as the added header # # slightly increases the amount of data that has to be sent. # # If your benchmark shows that using this compression level # # is superior to using no compression at all, the benchmark # # is likely to be flawed. # compression-level 0 # # #compression-level 9 # # 6.13. client-header-order # ========================== # # Specifies: # # The order in which client headers are sorted before forwarding # them. # # Type of value: # # Client header names delimited by spaces or tabs # # Default value: # # None # # Notes: # # By default Privoxy leaves the client headers in the order they # were sent by the client. Headers are modified in-place, new # headers are added at the end of the already existing headers. # # The header order can be used to fingerprint client requests # independently of other headers like the User-Agent. # # This directive allows to sort the headers differently to # better mimic a different User-Agent. Client headers will be # emitted in the order given, headers whose name isn't # explicitly specified are added at the end. # # Note that sorting headers in an uncommon way will make # fingerprinting actually easier. Encrypted headers are not # affected by this directive. # #client-header-order Host \ # Accept \ # Accept-Language \ # Accept-Encoding \ # Proxy-Connection \ # Referer \ # Cookie \ # DNT \ # If-Modified-Since \ # Cache-Control \ # Content-Length \ # Content-Type # # # 6.14. client-specific-tag # ========================== # # Specifies: # # The name of a tag that will always be set for clients that # requested it through the webinterface. # # Type of value: # # Tag name followed by a description that will be shown in the # webinterface # # Default value: # # None # # Notes: # # +-----------------------------------------------------+ # | Warning | # |-----------------------------------------------------| # |This is an experimental feature. The syntax is likely| # |to change in future versions. | # +-----------------------------------------------------+ # # Client-specific tags allow Privoxy admins to create different # profiles and let the users chose which one they want without # impacting other users. # # One use case is allowing users to circumvent certain blocks # without having to allow them to circumvent all blocks. This is # not possible with the enable-remote-toggle feature because it # would bluntly disable all blocks for all users and also affect # other actions like filters. It also is set globally which # renders it useless in most multi-user setups. # # After a client-specific tag has been defined with the # client-specific-tag directive, action sections can be # activated based on the tag by using a CLIENT-TAG pattern. The # CLIENT-TAG pattern is evaluated at the same priority as URL # patterns, as a result the last matching pattern wins. Tags # that are created based on client or server headers are # evaluated later on and can overrule CLIENT-TAG and URL # patterns! # # The tag is set for all requests that come from clients that # requested it to be set. Note that "clients" are differentiated # by IP address, if the IP address changes the tag has to be # requested again. # # Clients can request tags to be set by using the CGI interface # http://config.privoxy.org/client-tags. The specific tag # description is only used on the web page and should be phrased # in away that the user understand the effect of the tag. # # Examples: # # # Define a couple of tags, the described effect requires action sections # # that are enabled based on CLIENT-TAG patterns. # client-specific-tag circumvent-blocks Overrule blocks but do not affect other actions # disable-content-filters Disable content-filters but do not affect other actions # # # # 6.15. client-tag-lifetime # ========================== # # Specifies: # # How long a temporarily enabled tag remains enabled. # # Type of value: # # Time in seconds. # # Default value: # # 60 # # Notes: # # +-----------------------------------------------------+ # | Warning | # |-----------------------------------------------------| # |This is an experimental feature. The syntax is likely| # |to change in future versions. | # +-----------------------------------------------------+ # # In case of some tags users may not want to enable them # permanently, but only for a short amount of time, for example # to circumvent a block that is the result of an overly-broad # URL pattern. # # The CGI interface http://config.privoxy.org/client-tags # therefore provides a "enable this tag temporarily" option. If # it is used, the tag will be set until the client-tag-lifetime # is over. # # Examples: # # # Increase the time to life for temporarily enabled tags to 3 minutes # client-tag-lifetime 180 # # # # 6.16. trust-x-forwarded-for # ============================ # # Specifies: # # Whether or not Privoxy should use IP addresses specified with # the X-Forwarded-For header # # Type of value: # # 0 or one # # Default value: # # 0 # # Notes: # # +-----------------------------------------------------+ # | Warning | # |-----------------------------------------------------| # |This is an experimental feature. The syntax is likely| # |to change in future versions. | # +-----------------------------------------------------+ # # If clients reach Privoxy through another proxy, for example a # load balancer, Privoxy can't tell the client's IP address from # the connection. If multiple clients use the same proxy, they # will share the same client tag settings which is usually not # desired. # # This option lets Privoxy use the X-Forwarded-For header value # as client IP address. If the proxy sets the header, multiple # clients using the same proxy do not share the same client tag # settings. # # This option should only be enabled if Privoxy can only be # reached through a proxy and if the proxy can be trusted to set # the header correctly. It is recommended that ACL are used to # make sure only trusted systems can reach Privoxy. # # If access to Privoxy isn't limited to trusted systems, this # option would allow malicious clients to change the client tags # for other clients or increase Privoxy's memory requirements by # registering lots of client tag settings for clients that don't # exist. # # Examples: # # # Allow systems that can reach Privoxy to provide the client # # IP address with a X-Forwarded-For header. # trust-x-forwarded-for 1 # # # # 7. WINDOWS GUI OPTIONS # ======================= # # Privoxy has a number of options specific to the Windows GUI # interface: # # # # If "activity-animation" is set to 1, the Privoxy icon will animate # when "Privoxy" is active. To turn off, set to 0. # #activity-animation 1 # # # # If "log-messages" is set to 1, Privoxy copies log messages to the # console window. The log detail depends on the debug directive. # #log-messages 1 # # # # If "log-buffer-size" is set to 1, the size of the log buffer, i.e. # the amount of memory used for the log messages displayed in the # console window, will be limited to "log-max-lines" (see below). # # Warning: Setting this to 0 will result in the buffer to grow # infinitely and eat up all your memory! # #log-buffer-size 1 # # # # log-max-lines is the maximum number of lines held in the log # buffer. See above. # #log-max-lines 200 # # # # If "log-highlight-messages" is set to 1, Privoxy will highlight # portions of the log messages with a bold-faced font: # #log-highlight-messages 1 # # # # The font used in the console window: # #log-font-name Comic Sans MS # # # # Font size used in the console window: # #log-font-size 8 # # # # "show-on-task-bar" controls whether or not Privoxy will appear as # a button on the Task bar when minimized: # #show-on-task-bar 0 # # # # If "close-button-minimizes" is set to 1, the Windows close button # will minimize Privoxy instead of closing the program (close with # the exit option on the File menu). # #close-button-minimizes 1 # # # # The "hide-console" option is specific to the MS-Win console # version of Privoxy. If this option is used, Privoxy will # disconnect from and hide the command console. # #hide-console # # # ================================================ FILE: deprecated/Squid.wrapper ================================================ #!/bin/sh # # MacPorts generated daemondo support script # # # Init # prefix=/opt/local # # Start # Start() { cd /opt/local/var/squid if [ ! -d "/opt/local/var/squid/cache/00" ]; then /opt/local/sbin/squid -s -z fi /opt/local/sbin/squid -s -N } # # Stop # Stop() { cd /opt/local/var/squid /opt/local/sbin/squid -k shutdown while /opt/local/sbin/squid -k check; do sleep 1 done } # # Restart # Restart() { Stop Start } # # Run # Run() { case $1 in start ) Start ;; stop ) Stop ;; restart) Restart ;; * ) echo "$0: unknown argument: $1";; esac } # # Run a phase based on the selector # Run $1 ================================================ FILE: deprecated/disable.sh ================================================ #!/bin/bash -x # OS X Fortress: Firewall, Blackhole, and Privatizing Proxy # for Trackers, Attackers, Malware, Adware, and Spammers # disable.sh # commands SUDO=/usr/bin/sudo PORT=/opt/local/bin/port LAUNCHCTL=/bin/launchctl PFCTL=/sbin/pfctl KILLALL=/usr/bin/killall CAT=/bin/cat ECHO=/bin/echo $CAT < Label net.securemecca.pac.plist Program /bin/bash ProgramArguments /bin/bash -c export PROXY_PAC_DIRECTORY=/Library/WebServer/Documents; /bin/mkdir -p /usr/local/etc ; ( /bin/test -f $PROXY_PAC_DIRECTORY/proxy.pac.orig || /usr/bin/install -m 644 -S $PROXY_PAC_DIRECTORY/proxy.pac $PROXY_PAC_DIRECTORY/proxy.pac.orig ) && /bin/cp $PROXY_PAC_DIRECTORY/proxy.pac.orig /tmp/proxy.pac.orig && /opt/local/bin/wget -N -P /usr/local/etc http://securemecca.com/Downloads/AutoPac_EN.unx.7z && /opt/local/bin/7za x -aoa -o/tmp /usr/local/etc/AutoPac_EN.unx.7z AutoPac_EN.unx && /opt/local/bin/gpg --verify /tmp/AutoPac_EN.unx/proxy_en.sig /tmp/AutoPac_EN.unx/proxy_en && /usr/bin/printf '// *Modified for mydomainname.com*\n// King of the PAC from http://securemecca.com/pac.html:\n' > /tmp/proxy.pac && /usr/bin/sed -E 's/return[ \t]+normal/return MyFindProxyForURL(url.toString(), host)/g' /tmp/AutoPac_EN.unx/proxy_en >> /tmp/proxy.pac && /usr/bin/sed -E 's/function[ \t]+FindProxyForURL/function MyFindProxyForURL/' /tmp/proxy.pac.orig >> /tmp/proxy.pac && /usr/bin/install -m 644 -g admin -S /tmp/proxy.pac $PROXY_PAC_DIRECTORY/proxy.pac ; /bin/rm -fr /tmp/proxy.pac /tmp/proxy.pac.orig /tmp/AutoPac_EN.unx RunAtLoad StartInterval 90450 ServiceDescription securemecca.com King of the PAC Modification StandardErrorPath /var/log/system.log StandardOutPath /var/log/system.log ================================================ FILE: deprecated/org.adblockplus.privoxy-adblock.plist ================================================ Label org.adblockplus.privoxy-adblock.plist Program /bin/bash ProgramArguments /bin/bash -c /usr/local/bin/privoxy-adblock.sh && /bin/launchctl unload -w /Library/LaunchDaemons/org.macports.Privoxy.plist && /bin/launchctl load -w /Library/LaunchDaemons/org.macports.Privoxy.plist RunAtLoad StartInterval 90450 ServiceDescription GitHub skroll/privoxy-adblock fork StandardErrorPath /var/log/system.log StandardOutPath /var/log/system.log ================================================ FILE: deprecated/squid-27.conf ================================================ # WELCOME TO SQUID 2.7.STABLE9 # ---------------------------- # # This is the default Squid configuration file. You may wish # to look at the Squid home page (http://www.squid-cache.org/) # for the FAQ and other documentation. # # The default Squid config file shows what the defaults for # various options happen to be. If you don't need to change the # default, you shouldn't uncomment the line. Doing so may cause # run-time problems. In some cases "none" refers to no default # setting at all, while in other cases it refers to a valid # option - the comments for that keyword indicate if this is the # case. # # Configuration options can be included using the "include" directive. # Include takes a list of files to include. Quoting and wildcards is # supported. # # For example, # # include /path/to/included/file/squid.acl.config # # Includes can be nested up to a hard-coded depth of 16 levels. # This arbitrary restriction is to prevent recursive include references # from causing Squid entering an infinite loop whilst trying to load # configuration files. # OPTIONS FOR AUTHENTICATION # ----------------------------------------------------------------------------- # TAG: auth_param # This is used to define parameters for the various authentication # schemes supported by Squid. # # format: auth_param scheme parameter [setting] # # The order in which authentication schemes are presented to the client is # dependent on the order the scheme first appears in config file. IE # has a bug (it's not RFC 2617 compliant) in that it will use the basic # scheme if basic is the first entry presented, even if more secure # schemes are presented. For now use the order in the recommended # settings section below. If other browsers have difficulties (don't # recognize the schemes offered even if you are using basic) either # put basic first, or disable the other schemes (by commenting out their # program entry). # # Once an authentication scheme is fully configured, it can only be # shutdown by shutting squid down and restarting. Changes can be made on # the fly and activated with a reconfigure. I.E. You can change to a # different helper, but not unconfigure the helper completely. # # Please note that while this directive defines how Squid processes # authentication it does not automatically activate authentication. # To use authentication you must in addition make use of ACLs based # on login name in http_access (proxy_auth, proxy_auth_regex or # external with %LOGIN used in the format tag). The browser will be # challenged for authentication on the first such acl encountered # in http_access processing and will also be re-challenged for new # login credentials if the request is being denied by a proxy_auth # type acl. # # WARNING: authentication can't be used in a transparently intercepting # proxy as the client then thinks it is talking to an origin server and # not the proxy. This is a limitation of bending the TCP/IP protocol to # transparently intercepting port 80, not a limitation in Squid. # # === Parameters for the basic scheme follow. === # # "program" cmdline # Specify the command for the external authenticator. Such a program # reads a line containing "username password" and replies "OK" or # "ERR" in an endless loop. "ERR" responses may optionally be followed # by a error description available as %m in the returned error page. # # By default, the basic authentication scheme is not used unless a # program is specified. # # If you want to use the traditional proxy authentication, jump over to # the helpers/basic_auth/NCSA directory and type: # % make # % make install # # Then, set this line to something like # # auth_param basic program /opt/local/libexec/ncsa_auth /opt/local/etc/passwd # # "children" numberofchildren # The number of authenticator processes to spawn. If you start too few # squid will have to wait for them to process a backlog of credential # verifications, slowing it down. When credential verifications are # done via a (slow) network you are likely to need lots of # authenticator processes. # auth_param basic children 5 # # "concurrency" numberofconcurrentrequests # The number of concurrent requests/channels the helper supports. # Changes the protocol used to include a channel number first on # the request/response line, allowing multiple requests to be sent # to the same helper in parallell without wating for the response. # Must not be set unless it's known the helper supports this. # # "realm" realmstring # Specifies the realm name which is to be reported to the client for # the basic proxy authentication scheme (part of the text the user # will see when prompted their username and password). # auth_param basic realm Squid proxy-caching web server # # "credentialsttl" timetolive # Specifies how long squid assumes an externally validated # username:password pair is valid for - in other words how often the # helper program is called for that user. Set this low to force # revalidation with short lived passwords. Note that setting this high # does not impact your susceptibility to replay attacks unless you are # using an one-time password system (such as SecureID). If you are using # such a system, you will be vulnerable to replay attacks unless you # also use the max_user_ip ACL in an http_access rule. # auth_param basic credentialsttl 2 hours # # "casesensitive" on|off # Specifies if usernames are case sensitive. Most user databases are # case insensitive allowing the same username to be spelled using both # lower and upper case letters, but some are case sensitive. This # makes a big difference for user_max_ip ACL processing and similar. # auth_param basic casesensitive off # # "blankpassword" on|off # Specifies if blank passwords should be supported. Defaults to off # as there is multiple authentication backends which handles blank # passwords as "guest" access. # # === Parameters for the digest scheme follow === # # "program" cmdline # Specify the command for the external authenticator. Such a program # reads a line containing "username":"realm" and replies with the # appropriate H(A1) value hex encoded or ERR if the user (or his H(A1) # hash) does not exists. See RFC 2616 for the definition of H(A1). # "ERR" responses may optionally be followed by a error description # available as %m in the returned error page. # # By default, the digest authentication scheme is not used unless a # program is specified. # # If you want to use a digest authenticator, jump over to the # helpers/digest_auth/ directory and choose the authenticator to use. # It it's directory type # % make # % make install # # Then, set this line to something like # # auth_param digest program /opt/local/libexec/digest_auth_pw /opt/local/etc/digpass # # "children" numberofchildren # The number of authenticator processes to spawn. If you start too few # squid will have to wait for them to process a backlog of credential # verifications, slowing it down. When credential verifications are # done via a (slow) network you are likely to need lots of # authenticator processes. # auth_param digest children 5 # # "concurrency" numberofconcurrentrequests # The number of concurrent requests/channels the helper supports. # Changes the protocol used to include a channel number first on # the request/response line, allowing multiple requests to be sent # to the same helper in parallell without wating for the response. # Must not be set unless it's known the helper supports this. # # "realm" realmstring # Specifies the realm name which is to be reported to the client for the # digest proxy authentication scheme (part of the text the user will see # when prompted their username and password). # auth_param digest realm Squid proxy-caching web server # # "nonce_garbage_interval" timeinterval # Specifies the interval that nonces that have been issued to clients are # checked for validity. # auth_param digest nonce_garbage_interval 5 minutes # # "nonce_max_duration" timeinterval # Specifies the maximum length of time a given nonce will be valid for. # auth_param digest nonce_max_duration 30 minutes # # "nonce_max_count" number # Specifies the maximum number of times a given nonce can be used. # auth_param digest nonce_max_count 50 # # "nonce_strictness" on|off # Determines if squid requires strict increment-by-1 behavior for nonce # counts, or just incrementing (off - for use when useragents generate # nonce counts that occasionally miss 1 (ie, 1,2,4,6)). # auth_param digest nonce_strictness off # # "check_nonce_count" on|off # This directive if set to off can disable the nonce count check # completely to work around buggy digest qop implementations in certain # mainstream browser versions. Default on to check the nonce count to # protect from authentication replay attacks. # auth_param digest check_nonce_count on # # "post_workaround" on|off # This is a workaround to certain buggy browsers who sends an incorrect # request digest in POST requests when reusing the same nonce as acquired # earlier in response to a GET request. # auth_param digest post_workaround off # # === NTLM scheme options follow === # # "program" cmdline # Specify the command for the external NTLM authenticator. Such a # program participates in the NTLMSSP exchanges between Squid and the # client and reads commands according to the Squid NTLMSSP helper # protocol. See helpers/ntlm_auth/ for details. Recommended ntlm # authenticator is ntlm_auth from Samba-3.X, but a number of other # ntlm authenticators is available. # # By default, the ntlm authentication scheme is not used unless a # program is specified. # # auth_param ntlm program /path/to/samba/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp # # "children" numberofchildren # The number of authenticator processes to spawn. If you start too few # squid will have to wait for them to process a backlog of credential # verifications, slowing it down. When credential verifications are # done via a (slow) network you are likely to need lots of # authenticator processes. # auth_param ntlm children 5 # # "keep_alive" on|off # This option enables the use of keep-alive on the initial # authentication request. It has been reported some versions of MSIE # have problems if this is enabled, but performance will be increased # if enabled. # # auth_param ntlm keep_alive on # # === Negotiate scheme options follow === # # "program" cmdline # Specify the command for the external Negotiate authenticator. Such a # program participates in the SPNEGO exchanges between Squid and the # client and reads commands according to the Squid ntlmssp helper # protocol. See helpers/ntlm_auth/ for details. Recommended SPNEGO # authenticator is ntlm_auth from Samba-4.X. # # By default, the Negotiate authentication scheme is not used unless a # program is specified. # # auth_param negotiate program /path/to/samba/bin/ntlm_auth --helper-protocol=gss-spnego # # "children" numberofchildren # The number of authenticator processes to spawn. If you start too few # squid will have to wait for them to process a backlog of credential # verifications, slowing it down. When credential verifications are # done via a (slow) network you are likely to need lots of # authenticator processes. # auth_param negotiate children 5 # # "keep_alive" on|off # If you experience problems with PUT/POST requests when using the # Negotiate authentication scheme then you can try setting this to # off. This will cause Squid to forcibly close the connection on # the initial requests where the browser asks which schemes are # supported by the proxy. # # auth_param negotiate keep_alive on # #Recommended minimum configuration per scheme: #auth_param negotiate program #auth_param negotiate children 5 #auth_param negotiate keep_alive on #auth_param ntlm program #auth_param ntlm children 5 #auth_param ntlm keep_alive on #auth_param digest program #auth_param digest children 5 #auth_param digest realm Squid proxy-caching web server #auth_param digest nonce_garbage_interval 5 minutes #auth_param digest nonce_max_duration 30 minutes #auth_param digest nonce_max_count 50 #auth_param basic program #auth_param basic children 5 #auth_param basic realm Squid proxy-caching web server #auth_param basic credentialsttl 2 hours #auth_param basic casesensitive off # TAG: authenticate_cache_garbage_interval # The time period between garbage collection across the username cache. # This is a tradeoff between memory utilization (long intervals - say # 2 days) and CPU (short intervals - say 1 minute). Only change if you # have good reason to. # #Default: # authenticate_cache_garbage_interval 1 hour # TAG: authenticate_ttl # The time a user & their credentials stay in the logged in user cache # since their last request. When the garbage interval passes, all user # credentials that have passed their TTL are removed from memory. # #Default: # authenticate_ttl 1 hour # TAG: authenticate_ip_ttl # If you use proxy authentication and the 'max_user_ip' ACL, this # directive controls how long Squid remembers the IP addresses # associated with each user. Use a small value (e.g., 60 seconds) if # your users might change addresses quickly, as is the case with # dialups. You might be safe using a larger value (e.g., 2 hours) in a # corporate LAN environment with relatively static address assignments. # #Default: # authenticate_ip_ttl 0 seconds # TAG: authenticate_ip_shortcircuit_ttl # Cache authentication credentials per client IP address for this # long. Default is 0 seconds (disabled). # # See also authenticate_ip_shortcircuit_access directive. # #Default: # authenticate_ip_shortcircuit_ttl 0 seconds # ACCESS CONTROLS # ----------------------------------------------------------------------------- # TAG: external_acl_type # This option defines external acl classes using a helper program to # look up the status # # external_acl_type name [options] FORMAT.. /path/to/helper [helper arguments..] # # Options: # # ttl=n TTL in seconds for cached results (defaults to 3600 # for 1 hour) # negative_ttl=n # TTL for cached negative lookups (default same # as ttl) # children=n number of processes spawn to service external acl # lookups of this type. (default 5). # concurrency=n concurrency level per process. Only used with helpers # capable of processing more than one query at a time. # Note: see compatibility note below # cache=n result cache size, 0 is unbounded (default) # grace= Percentage remaining of TTL where a refresh of a # cached entry should be initiated without needing to # wait for a new reply. (default 0 for no grace period) # protocol=2.5 Compatibility mode for Squid-2.5 external acl helpers # # FORMAT specifications # # %LOGIN Authenticated user login name # %EXT_USER Username from external acl # %IDENT Ident user name # %SRC Client IP # %SRCPORT Client source port # %URI Requested URI # %DST Requested host # %PROTO Requested protocol # %PORT Requested port # %METHOD Request method # %MYADDR Squid interface address # %MYPORT Squid http_port number # %PATH Requested URL-path (including query-string if any) # %USER_CERT SSL User certificate in PEM format # %USER_CERTCHAIN SSL User certificate chain in PEM format # %USER_CERT_xx SSL User certificate subject attribute xx # %USER_CA_xx SSL User certificate issuer attribute xx # %{Header} HTTP request header "Header" # %{Hdr:member} HTTP request header "Hdr" list member "member" # %{Hdr:;member} # HTTP request header list member using ; as # list separator. ; can be any non-alphanumeric # character. # %ACL The ACL name # %DATA The ACL arguments. If not used then any arguments # is automatically added at the end # # In addition to the above, any string specified in the referencing # acl will also be included in the helper request line, after the # specified formats (see the "acl external" directive) # # The helper receives lines per the above format specification, # and returns lines starting with OK or ERR indicating the validity # of the request and optionally followed by additional keywords with # more details. # # General result syntax: # # OK/ERR keyword=value ... # # Defined keywords: # # user= The users name (login also understood) # password= The users password (for PROXYPASS login= cache_peer) # message= Error message or similar used as %o in error messages # (error also understood) # log= String to be logged in access.log. Available as # %ea in logformat specifications # # If protocol=3.0 (the default) then URL escaping is used to protect # each value in both requests and responses. # # If using protocol=2.5 then all values need to be enclosed in quotes # if they may contain whitespace, or the whitespace escaped using \. # And quotes or \ characters within the keyword value must be \ escaped. # # When using the concurrency= option the protocol is changed by # introducing a query channel tag infront of the request/response. # The query channel tag is a number between 0 and concurrency-1. # # Compatibility Note: The children= option was named concurrency= in # Squid-2.5.STABLE3 and earlier, and was accepted as an alias for the # duration of the Squid-2.5 releases to keep compatibility. However, # the meaning of concurrency= option has changed in Squid-2.6 to match # that of Squid-3 and the old syntax no longer works. # #Default: # none # TAG: acl # Defining an Access List # # Every access list definition must begin with an aclname and acltype, # followed by either type-specific arguments or a quoted filename that # they are read from. # # acl aclname acltype argument ... # acl aclname acltype "file" ... # # when using "file", the file should contain one item per line. # # By default, regular expressions are CASE-SENSITIVE. To make # them case-insensitive, use the -i option. # # acl aclname src ip-address/netmask ... (clients IP address) # acl aclname src addr1-addr2/netmask ... (range of addresses) # acl aclname dst ip-address/netmask ... (URL host's IP address) # acl aclname myip ip-address/netmask ... (local socket IP address) # # acl aclname arp mac-address ... (xx:xx:xx:xx:xx:xx notation) # # The arp ACL requires the special configure option --enable-arp-acl. # # Furthermore, the arp ACL code is not portable to all operating systems. # # It works on Linux, Solaris, FreeBSD and some other *BSD variants. # # # # NOTE: Squid can only determine the MAC address for clients that are on # # the same subnet. If the client is on a different subnet, then Squid cannot # # find out its MAC address. # # acl aclname srcdomain .foo.com ... # reverse lookup, client IP # acl aclname dstdomain .foo.com ... # Destination server from URL # acl aclname srcdom_regex [-i] xxx ... # regex matching client name # acl aclname dstdom_regex [-i] xxx ... # regex matching server # # For dstdomain and dstdom_regex a reverse lookup is tried if a IP # # based URL is used and no match is found. The name "none" is used # # if the reverse lookup fails. # # acl aclname time [day-abbrevs] [h1:m1-h2:m2] # # day-abbrevs: # # S - Sunday # # M - Monday # # T - Tuesday # # W - Wednesday # # H - Thursday # # F - Friday # # A - Saturday # # h1:m1 must be less than h2:m2 # acl aclname url_regex [-i] ^http:// ... # regex matching on whole URL # acl aclname urlpath_regex [-i] \.gif$ ... # regex matching on URL path # acl aclname urllogin [-i] [^a-zA-Z0-9] ... # regex matching on URL login field # acl aclname port 80 70 21 ... # acl aclname port 0-1024 ... # ranges allowed # acl aclname myport 3128 ... # (local socket TCP port) # acl aclname myportname 3128 ... # http(s)_port name # acl aclname proto HTTP FTP ... # acl aclname method GET POST ... # acl aclname browser [-i] regexp ... # # pattern match on User-Agent header (see also req_header below) # acl aclname referer_regex [-i] regexp ... # # pattern match on Referer header # # Referer is highly unreliable, so use with care # acl aclname ident username ... # acl aclname ident_regex [-i] pattern ... # # string match on ident output. # # use REQUIRED to accept any non-null ident. # acl aclname src_as number ... # acl aclname dst_as number ... # # Except for access control, AS numbers can be used for # # routing of requests to specific caches. Here's an # # example for routing all requests for AS#1241 and only # # those to mycache.mydomain.net: # # acl asexample dst_as 1241 # # cache_peer_access mycache.mydomain.net allow asexample # # cache_peer_access mycache_mydomain.net deny all # # acl aclname proxy_auth [-i] username ... # acl aclname proxy_auth_regex [-i] pattern ... # # list of valid usernames # # use REQUIRED to accept any valid username. # # # # NOTE: when a Proxy-Authentication header is sent but it is not # # needed during ACL checking the username is NOT logged # # in access.log. # # # # NOTE: proxy_auth requires a EXTERNAL authentication program # # to check username/password combinations (see # # auth_param directive). # # # # NOTE: proxy_auth can't be used in a transparent proxy as # # the browser needs to be configured for using a proxy in order # # to respond to proxy authentication. # # acl aclname snmp_community string ... # # A community string to limit access to your SNMP Agent # # Example: # # # # acl snmppublic snmp_community public # # acl aclname maxconn number # # This will be matched when the client's IP address has # # more than HTTP connections established. # # acl aclname max_user_ip [-s] number # # This will be matched when the user attempts to log in from more # # than different ip addresses. The authenticate_ip_ttl # # parameter controls the timeout on the ip entries. # # If -s is specified the limit is strict, denying browsing # # from any further IP addresses until the ttl has expired. Without # # -s Squid will just annoy the user by "randomly" denying requests. # # (the counter is reset each time the limit is reached and a # # request is denied) # # NOTE: in acceleration mode or where there is mesh of child proxies, # # clients may appear to come from multiple addresses if they are # # going through proxy farms, so a limit of 1 may cause user problems. # # acl aclname req_mime_type mime-type ... # # regex match against the mime type of the request generated # # by the client. Can be used to detect file upload or some # # types HTTP tunneling requests. # # NOTE: This does NOT match the reply. You cannot use this # # to match the returned file type. # # acl aclname req_header header-name [-i] any\.regex\.here # # regex match against any of the known request headers. May be # # thought of as a superset of "browser", "referer" and "mime-type" # # ACLs. # # acl aclname rep_mime_type mime-type ... # # regex match against the mime type of the reply received by # # squid. Can be used to detect file download or some # # types HTTP tunneling requests. # # NOTE: This has no effect in http_access rules. It only has # # effect in rules that affect the reply data stream such as # # http_reply_access. # # acl aclname rep_header header-name [-i] any\.regex\.here # # regex match against any of the known reply headers. May be # # thought of as a superset of "browser", "referer" and "mime-type" # # ACLs. # # # # Example: # # # # acl many_spaces rep_header Content-Disposition -i [[:space:]]{3,} # # acl aclname external class_name [arguments...] # # external ACL lookup via a helper class defined by the # # external_acl_type directive. # # acl aclname urlgroup group1 ... # # match against the urlgroup as indicated by redirectors # # acl aclname user_cert attribute values... # # match against attributes in a user SSL certificate # # attribute is one of DN/C/O/CN/L/ST # # acl aclname ca_cert attribute values... # # match against attributes a users issuing CA SSL certificate # # attribute is one of DN/C/O/CN/L/ST # # acl aclname ext_user username ... # acl aclname ext_user_regex [-i] pattern ... # # string match on username returned by external acl helper # # use REQUIRED to accept any non-null user name. # #Examples: #acl macaddress arp 09:00:2b:23:45:67 #acl myexample dst_as 1241 #acl password proxy_auth REQUIRED #acl fileupload req_mime_type -i ^multipart/form-data$ #acl javascript rep_mime_type -i ^application/x-javascript$ # #Recommended minimum configuration: acl all src all acl manager proto cache_object acl localhost src 127.0.0.1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 # # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl localnet src 10.0.0.0/8 # RFC1918 possible internal network #acl localnet src 172.16.0.0/12 # RFC1918 possible internal network #acl localnet src 192.168.0.0/16 # RFC1918 possible internal network # acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT # TAG: http_access # Allowing or Denying access based on defined access lists # # Access to the HTTP port: # http_access allow|deny [!]aclname ... # # NOTE on default values: # # If there are no "access" lines present, the default is to deny # the request. # # If none of the "access" lines cause a match, the default is the # opposite of the last line in the list. If the last line was # deny, the default is allow. Conversely, if the last line # is allow, the default will be deny. For these reasons, it is a # good idea to have an "deny all" or "allow all" entry at the end # of your access lists to avoid potential confusion. # #Default: # http_access deny all # #Recommended minimum configuration: # # Only allow cachemgr access from localhost http_access allow manager localhost http_access deny manager # Deny requests to unknown ports http_access deny !Safe_ports # Deny CONNECT to other than SSL ports http_access deny CONNECT !SSL_ports # # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS http_access allow localhost # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow localnet # And finally deny all other access to this proxy http_access deny all # TAG: http_access2 # Allowing or Denying access based on defined access lists # # Identical to http_access, but runs after redirectors. If not set # then only http_access is used. # #Default: # none # TAG: http_reply_access # Allow replies to client requests. This is complementary to http_access. # # http_reply_access allow|deny [!] aclname ... # # NOTE: if there are no access lines present, the default is to allow # all replies # # If none of the access lines cause a match the opposite of the # last line will apply. Thus it is good practice to end the rules # with an "allow all" or "deny all" entry. # #Default: # http_reply_access allow all # TAG: icp_access # Allowing or Denying access to the ICP port based on defined # access lists # # icp_access allow|deny [!]aclname ... # # See http_access for details # #Default: # icp_access deny all # #Allow ICP queries from local networks only icp_access allow localnet icp_access deny all # TAG: htcp_access # Note: This option is only available if Squid is rebuilt with the # --enable-htcp option # # Allowing or Denying access to the HTCP port based on defined # access lists # # htcp_access allow|deny [!]aclname ... # # See http_access for details # # NOTE: The default if no htcp_access lines are present is to # deny all traffic. This default may cause problems with peers # using the htcp or htcp-oldsquid options. # #Default: # htcp_access deny all # #Allow HTCP queries from local networks only # htcp_access allow localnet # htcp_access deny all # TAG: htcp_clr_access # Note: This option is only available if Squid is rebuilt with the # --enable-htcp option # # Allowing or Denying access to purge content using HTCP based # on defined access lists # # htcp_clr_access allow|deny [!]aclname ... # # See http_access for details # ##Allow HTCP CLR requests from trusted peers #acl htcp_clr_peer src 172.16.1.2 #htcp_clr_access allow htcp_clr_peer # #Default: # htcp_clr_access deny all # TAG: miss_access # Use to force your neighbors to use you as a sibling instead of # a parent. For example: # # acl localclients src 172.16.0.0/16 # miss_access allow localclients # miss_access deny !localclients # # This means only your local clients are allowed to fetch # MISSES and all other clients can only fetch HITS. # # By default, allow all clients who passed the http_access rules # to fetch MISSES from us. # #Default setting: # miss_access allow all # TAG: ident_lookup_access # A list of ACL elements which, if matched, cause an ident # (RFC931) lookup to be performed for this request. For # example, you might choose to always perform ident lookups # for your main multi-user Unix boxes, but not for your Macs # and PCs. By default, ident lookups are not performed for # any requests. # # To enable ident lookups for specific client addresses, you # can follow this example: # # acl ident_aware_hosts src 198.168.1.0/255.255.255.0 # ident_lookup_access allow ident_aware_hosts # ident_lookup_access deny all # # Only src type ACL checks are fully supported. A src_domain # ACL might work at times, but it will not always provide # the correct result. # #Default: # ident_lookup_access deny all # TAG: reply_body_max_size bytes deny acl acl... # This option specifies the maximum size of a reply body in bytes. # It can be used to prevent users from downloading very large files, # such as MP3's and movies. When the reply headers are received, # the reply_body_max_size lines are processed, and the first line with # a result of "deny" is used as the maximum body size for this reply. # This size is checked twice. First when we get the reply headers, # we check the content-length value. If the content length value exists # and is larger than the allowed size, the request is denied and the # user receives an error message that says "the request or reply # is too large." If there is no content-length, and the reply # size exceeds this limit, the client's connection is just closed # and they will receive a partial reply. # # WARNING: downstream caches probably can not detect a partial reply # if there is no content-length header, so they will cache # partial responses and give them out as hits. You should NOT # use this option if you have downstream caches. # # If you set this parameter to zero (the default), there will be # no limit imposed. # #Default: # reply_body_max_size 0 allow all # TAG: authenticate_ip_shortcircuit_access # Access list determining when shortcicuiting the authentication process # based on source IP cached credentials is acceptable. Use this to deny # using the ip auth cache on requests from child proxies or other source # ip's having multiple users. # # See also authenticate_ip_shortcircuit_ttl directive # #Default: # none # OPTIONS FOR X-Forwarded-For # ----------------------------------------------------------------------------- # TAG: follow_x_forwarded_for # Note: This option is only available if Squid is rebuilt with the # -DFOLLOW_X_FORWARDED_FOR option # # Allowing or Denying the X-Forwarded-For header to be followed to # find the original source of a request. # # Requests may pass through a chain of several other proxies # before reaching us. The X-Forwarded-For header will contain a # comma-separated list of the IP addresses in the chain, with the # rightmost address being the most recent. # # If a request reaches us from a source that is allowed by this # configuration item, then we consult the X-Forwarded-For header # to see where that host received the request from. If the # X-Forwarded-For header contains multiple addresses, and if # acl_uses_indirect_client is on, then we continue backtracking # until we reach an address for which we are not allowed to # follow the X-Forwarded-For header, or until we reach the first # address in the list. (If acl_uses_indirect_client is off, then # it's impossible to backtrack through more than one level of # X-Forwarded-For addresses.) # # The end result of this process is an IP address that we will # refer to as the indirect client address. This address may # be treated as the client address for access control, delay # pools and logging, depending on the acl_uses_indirect_client, # delay_pool_uses_indirect_client and log_uses_indirect_client # options. # # SECURITY CONSIDERATIONS: # # Any host for which we follow the X-Forwarded-For header # can place incorrect information in the header, and Squid # will use the incorrect information as if it were the # source address of the request. This may enable remote # hosts to bypass any access control restrictions that are # based on the client's source addresses. # # For example: # # acl localhost src 127.0.0.1 # acl my_other_proxy srcdomain .proxy.example.com # follow_x_forwarded_for allow localhost # follow_x_forwarded_for allow my_other_proxy # #Default: # follow_x_forwarded_for deny all # TAG: acl_uses_indirect_client on|off # Note: This option is only available if Squid is rebuilt with the # -DFOLLOW_X_FORWARDED_FOR option # # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address in acl matching. # #Default: # acl_uses_indirect_client on # TAG: delay_pool_uses_indirect_client on|off # Note: This option is only available if Squid is rebuilt with the # -DFOLLOW_X_FORWARDED_FOR option # # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address in delay pools. # #Default: # delay_pool_uses_indirect_client on # TAG: log_uses_indirect_client on|off # Note: This option is only available if Squid is rebuilt with the # -DFOLLOW_X_FORWARDED_FOR option # # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address in the access log. # #Default: # log_uses_indirect_client on # SSL OPTIONS # ----------------------------------------------------------------------------- # TAG: ssl_unclean_shutdown # Some browsers (especially MSIE) bugs out on SSL shutdown # messages. # #Default: # ssl_unclean_shutdown off # TAG: ssl_engine # The OpenSSL engine to use. You will need to set this if you # would like to use hardware SSL acceleration for example. # #Default: # none # TAG: sslproxy_client_certificate # Client SSL Certificate to use when proxying https:// URLs # #Default: # none # TAG: sslproxy_client_key # Client SSL Key to use when proxying https:// URLs # #Default: # none # TAG: sslproxy_version # SSL version level to use when proxying https:// URLs # #Default: # sslproxy_version 1 # TAG: sslproxy_options # SSL engine options to use when proxying https:// URLs # #Default: # none # TAG: sslproxy_cipher # SSL cipher list to use when proxying https:// URLs # #Default: # none # TAG: sslproxy_cafile # file containing CA certificates to use when verifying server # certificates while proxying https:// URLs # #Default: # none # TAG: sslproxy_capath # directory containing CA certificates to use when verifying # server certificates while proxying https:// URLs # #Default: # none # TAG: sslproxy_flags # Various flags modifying the use of SSL while proxying https:// URLs: # DONT_VERIFY_PEER Accept certificates even if they fail to # verify. # NO_DEFAULT_CA Don't use the default CA list built in # to OpenSSL. # #Default: # none # TAG: sslpassword_program # Specify a program used for entering SSL key passphrases # when using encrypted SSL certificate keys. If not specified # keys must either be unencrypted, or Squid started with the -N # option to allow it to query interactively for the passphrase. # #Default: # none # NETWORK OPTIONS # ----------------------------------------------------------------------------- # TAG: http_port # Usage: port [options] # hostname:port [options] # 1.2.3.4:port [options] # # The socket addresses where Squid will listen for HTTP client # requests. You may specify multiple socket addresses. # There are three forms: port alone, hostname with port, and # IP address with port. If you specify a hostname or IP # address, Squid binds the socket to that specific # address. This replaces the old 'tcp_incoming_address' # option. Most likely, you do not need to bind to a specific # address, so you can use the port number alone. # # If you are running Squid in accelerator mode, you # probably want to listen on port 80 also, or instead. # # The -I command line option will override the *first* port # specified here. # # You may specify multiple socket addresses on multiple lines. # # Options: # # transparent Support for transparent interception of # outgoing requests without browser settings. # # tproxy Support Linux TPROXY for spoofing outgoing # connections using the client IP address. # # accel Accelerator mode. See also the related vhost, # vport and defaultsite directives. # # defaultsite=domainname # What to use for the Host: header if it is not present # in a request. Determines what site (not origin server) # accelerators should consider the default. # Defaults to visible_hostname:port if not set # May be combined with vport=NN to override the port number. # Implies accel. # # vhost Accelerator mode using Host header for virtual # domain support. Implies accel. # # vport Accelerator with IP based virtual host support. # Implies accel. # # vport=NN As above, but uses specified port number rather # than the http_port number. Implies accel. # # allow-direct Allow direct forwarding in accelerator mode. Normally # accelerated requests is denied direct forwarding as it # never_direct was used. # # urlgroup= Default urlgroup to mark requests with (see # also acl urlgroup and url_rewrite_program) # # protocol= Protocol to reconstruct accelerated requests with. # Defaults to http. # # no-connection-auth # Prevent forwarding of Microsoft connection oriented # authentication (NTLM, Negotiate and Kerberos) # # act-as-origin # Act is if this Squid is the origin server. # This currently means generate own Date: and # Expires: headers. Implies accel. # # http11 Enables HTTP/1.1 support to clients. The HTTP/1.1 # support is still incomplete with an internal HTTP/1.0 # hop, but should work with most clients. The main # HTTP/1.1 features missing due to this is forwarding # of requests using chunked transfer encoding (results # in 411) and forwarding of 1xx responses (silently # dropped) # # name= Specifies a internal name for the port. Defaults to # the port specification (port or addr:port) # # tcpkeepalive[=idle,interval,timeout] # Enable TCP keepalive probes of idle connections # idle is the initial time before TCP starts probing # the connection, interval how often to probe, and # timeout the time before giving up. # # If you run Squid on a dual-homed machine with an internal # and an external interface we recommend you to specify the # internal address:port in http_port. This way Squid will only be # visible on the internal address. # # Squid normally listens to port 3128 http_port 127.0.0.1:3128 name=localhost # Uncomment and change to your server IP for LAN or OpenVPN access #http_port 10.0.1.3:3128 name=LAN #http_port 10.8.0.1:3128 name=OpenVPN # TAG: https_port # Usage: [ip:]port cert=certificate.pem [key=key.pem] [options...] # # The socket address where Squid will listen for HTTPS client # requests. # # This is really only useful for situations where you are running # squid in accelerator mode and you want to do the SSL work at the # accelerator level. # # You may specify multiple socket addresses on multiple lines, # each with their own SSL certificate and/or options. # # Options: # # In addition to the options specified for http_port the folling # SSL related options is supported: # # cert= Path to SSL certificate (PEM format). # # key= Path to SSL private key file (PEM format) # if not specified, the certificate file is # assumed to be a combined certificate and # key file. # # version= The version of SSL/TLS supported # 1 automatic (default) # 2 SSLv2 only # 3 SSLv3 only # 4 TLSv1 only # # cipher= Colon separated list of supported ciphers. # # options= Various SSL engine options. The most important # being: # NO_SSLv2 Disallow the use of SSLv2 # NO_SSLv3 Disallow the use of SSLv3 # NO_TLSv1 Disallow the use of TLSv1 # SINGLE_DH_USE Always create a new key when using # temporary/ephemeral DH key exchanges # See src/ssl_support.c or OpenSSL SSL_CTX_set_options # documentation for a complete list of options. # # clientca= File containing the list of CAs to use when # requesting a client certificate. # # cafile= File containing additional CA certificates to # use when verifying client certificates. If unset # clientca will be used. # # capath= Directory containing additional CA certificates # and CRL lists to use when verifying client certificates. # # crlfile= File of additional CRL lists to use when verifying # the client certificate, in addition to CRLs stored in # the capath. Implies VERIFY_CRL flag below. # # dhparams= File containing DH parameters for temporary/ephemeral # DH key exchanges. # # sslflags= Various flags modifying the use of SSL: # DELAYED_AUTH # Don't request client certificates # immediately, but wait until acl processing # requires a certificate (not yet implemented). # NO_DEFAULT_CA # Don't use the default CA lists built in # to OpenSSL. # NO_SESSION_REUSE # Don't allow for session reuse. Each connection # will result in a new SSL session. # VERIFY_CRL # Verify CRL lists when accepting client # certificates. # VERIFY_CRL_ALL # Verify CRL lists for all certificates in the # client certificate chain. # # sslcontext= SSL session ID context identifier. # # #Default: # none # TAG: tcp_outgoing_tos # Allows you to select a TOS/Diffserv value to mark outgoing # connections with, based on the username or source address # making the request. # # tcp_outgoing_tos ds-field [!]aclname ... # # Example where normal_service_net uses the TOS value 0x00 # and good_service_net uses 0x20 # # acl normal_service_net src 10.0.0.0/255.255.255.0 # acl good_service_net src 10.0.1.0/255.255.255.0 # tcp_outgoing_tos 0x00 normal_service_net # tcp_outgoing_tos 0x20 good_service_net # # TOS/DSCP values really only have local significance - so you should # know what you're specifying. For more information, see RFC2474 and # RFC3260. # # The TOS/DSCP byte must be exactly that - a octet value 0 - 255, or # "default" to use whatever default your host has. Note that in # practice often only values 0 - 63 is usable as the two highest bits # have been redefined for use by ECN (RFC3168). # # Processing proceeds in the order specified, and stops at first fully # matching line. # # Note: The use of this directive using client dependent ACLs is # incompatible with the use of server side persistent connections. To # ensure correct results it is best to set server_persisten_connections # to off when using this directive in such configurations. # #Default: # none # TAG: tcp_outgoing_address # Allows you to map requests to different outgoing IP addresses # based on the username or source address of the user making # the request. # # tcp_outgoing_address ipaddr [[!]aclname] ... # # Example where requests from 10.0.0.0/24 will be forwarded # with source address 10.1.0.1, 10.0.2.0/24 forwarded with # source address 10.1.0.2 and the rest will be forwarded with # source address 10.1.0.3. # # acl normal_service_net src 10.0.0.0/24 # acl good_service_net src 10.0.1.0/24 10.0.2.0/24 # tcp_outgoing_address 10.1.0.1 normal_service_net # tcp_outgoing_address 10.1.0.2 good_service_net # tcp_outgoing_address 10.1.0.3 # # Processing proceeds in the order specified, and stops at first fully # matching line. # # Note: The use of this directive using client dependent ACLs is # incompatible with the use of server side persistent connections. To # ensure correct results it is best to set server_persistent_connections # to off when using this directive in such configurations. # #Default: # none # TAG: zph_mode # This option enables packet level marking of HIT/MISS responses, # either using IP TOS or socket priority. # off Feature disabled # tos Set the IP TOS/Diffserv field # priority Set the socket priority (may get mapped to TOS by OS, # otherwise only usable in local rulesets) # option Embed the mark in an IP option field. See also # zph_option. # # See also tcp_outgoing_tos for details/requirements about TOS usage. # #Default: # zph_mode off # TAG: zph_local # Allows you to select a TOS/Diffserv/Priority value to mark local hits. # Default: 0 (disabled). # #Default: # zph_local 0 # TAG: zph_sibling # Allows you to select a TOS/Diffserv/Priority value to mark sibling hits. # Default: 0 (disabled). # #Default: # zph_sibling 0 # TAG: zph_parent # Allows you to select a TOS/Diffserv/Priority value to mark parent hits. # Default: 0 (disabled). # #Default: # zph_parent 0 # TAG: zph_option # The IP option to use when zph_mode is set to "option". Defaults to # 136 which is officially registered as "SATNET Stream ID". # #Default: # zph_option 136 # OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM # ----------------------------------------------------------------------------- # TAG: cache_peer # To specify other caches in a hierarchy, use the format: # # cache_peer hostname type http-port icp-port [options] # # For example, # # # proxy icp # # hostname type port port options # # -------------------- -------- ----- ----- ----------- # cache_peer parent.foo.net parent 3128 3130 proxy-only default # cache_peer sib1.foo.net sibling 3128 3130 proxy-only # cache_peer sib2.foo.net sibling 3128 3130 proxy-only # # type: either 'parent', 'sibling', or 'multicast'. # # proxy-port: The port number where the cache listens for proxy # requests. # # icp-port: Used for querying neighbor caches about # objects. To have a non-ICP neighbor # specify '7' for the ICP port and make sure the # neighbor machine has the UDP echo port # enabled in its /etc/inetd.conf file. # NOTE: Also requires icp_port option enabled to send/receive # requests via this method. # # options: proxy-only # weight=n # ttl=n # no-query # default # round-robin # carp # multicast-responder # multicast-siblings # closest-only # no-digest # no-netdb-exchange # no-delay # login=user:password | PASS | *:password # connect-timeout=nn # digest-url=url # allow-miss # max-conn=n # htcp # htcp-oldsquid # originserver # userhash # sourcehash # name=xxx # monitorurl=url # monitorsize=sizespec # monitorinterval=seconds # monitortimeout=seconds # forceddomain=name # ssl # sslcert=/path/to/ssl/certificate # sslkey=/path/to/ssl/key # sslversion=1|2|3|4 # sslcipher=... # ssloptions=... # front-end-https[=on|auto] # connection-auth[=on|off|auto] # idle=n # http11 # # use 'proxy-only' to specify objects fetched # from this cache should not be saved locally. # # use 'weight=n' to affect the selection of a peer # during any weighted peer-selection mechanisms. # The weight must be an integer; default is 1, # larger weights are favored more. # This option does not affect parent selection if a peering # protocol is not in use. # # use 'ttl=n' to specify a IP multicast TTL to use # when sending an ICP queries to this address. # Only useful when sending to a multicast group. # Because we don't accept ICP replies from random # hosts, you must configure other group members as # peers with the 'multicast-responder' option below. # # use 'no-query' to NOT send ICP queries to this # neighbor. # # use 'default' if this is a parent cache which can # be used as a "last-resort" if a peer cannot be located # by any of the peer-selection mechanisms. # If specified more than once, only the first is used. # # use 'round-robin' to define a set of parents which # should be used in a round-robin fashion in the # absence of any ICP queries. # # use 'carp' to define a set of parents which should # be used as a CARP array. The requests will be # distributed among the parents based on the CARP load # balancing hash function based on their weight. # # 'multicast-responder' indicates the named peer # is a member of a multicast group. ICP queries will # not be sent directly to the peer, but ICP replies # will be accepted from it. # # the 'multicast-siblings' option is meant to be used # only for cache peers of type "multicast". It instructs # Squid that ALL members of this multicast group have # "sibling" relationship with it, not "parent". This is # an optimization that avoids useless multicast queries # to a multicast group when the requested object would # be fetched only from a "parent" cache, anyway. It's # useful, e.g., when configuring a pool of redundant # Squid proxies, being members of the same # multicast group. # # 'closest-only' indicates that, for ICP_OP_MISS # replies, we'll only forward CLOSEST_PARENT_MISSes # and never FIRST_PARENT_MISSes. # # use 'no-digest' to NOT request cache digests from # this neighbor. # # 'no-netdb-exchange' disables requesting ICMP # RTT database (NetDB) from the neighbor. # # use 'no-delay' to prevent access to this neighbor # from influencing the delay pools. # # use 'login=user:password' if this is a personal/workgroup # proxy and your parent requires proxy authentication. # Note: The string can include URL escapes (i.e. %20 for # spaces). This also means % must be written as %%. # # use 'login=PASS' if users must authenticate against # the upstream proxy or in the case of a reverse proxy # configuration, the origin web server. This will pass # the users credentials as they are to the peer. # Note: To combine this with local authentication the Basic # authentication scheme must be used, and both servers must # share the same user database as HTTP only allows for # a single login (one for proxy, one for origin server). # Also be warned this will expose your users proxy # password to the peer. USE WITH CAUTION # # use 'login=*:password' to pass the username to the # upstream cache, but with a fixed password. This is meant # to be used when the peer is in another administrative # domain, but it is still needed to identify each user. # The star can optionally be followed by some extra # information which is added to the username. This can # be used to identify this proxy to the peer, similar to # the login=username:password option above. # # use 'connect-timeout=nn' to specify a peer # specific connect timeout (also see the # peer_connect_timeout directive) # # use 'digest-url=url' to tell Squid to fetch the cache # digest (if digests are enabled) for this host from # the specified URL rather than the Squid default # location. # # use 'allow-miss' to disable Squid's use of only-if-cached # when forwarding requests to siblings. This is primarily # useful when icp_hit_stale is used by the sibling. To # extensive use of this option may result in forwarding # loops, and you should avoid having two-way peerings # with this option. (for example to deny peer usage on # requests from peer by denying cache_peer_access if the # source is a peer) # # use 'max-conn=n' to limit the amount of connections Squid # may open to this peer. # # use 'htcp' to send HTCP, instead of ICP, queries # to the neighbor. You probably also want to # set the "icp port" to 4827 instead of 3130. # You must also allow this Squid htcp_access and # http_access in the peer Squid configuration. # # use 'htcp-oldsquid' to send HTCP to old Squid versions # You must also allow this Squid htcp_access and # http_access in the peer Squid configuration. # # 'originserver' causes this parent peer to be contacted as # a origin server. Meant to be used in accelerator setups. # # use 'userhash' to load-balance amongst a set of parents # based on the client proxy_auth or ident username. # # use 'sourcehash' to load-balance amongst a set of parents # based on the client source ip. # # use 'name=xxx' if you have multiple peers on the same # host but different ports. This name can be used to # differentiate the peers in cache_peer_access and similar # directives. # # use 'monitorurl=url' to have periodically request a given # URL from the peer, and only consider the peer as alive # if this monitoring is successful (default none) # # use 'monitorsize=min[-max]' to limit the size range of # 'monitorurl' replies considered valid. Defaults to 0 to # accept any size replies as valid. # # use 'monitorinterval=seconds' to change frequency of # how often the peer is monitored with 'monitorurl' # (default 300 for a 5 minute interval). If set to 0 # then monitoring is disabled even if a URL is defined. # # use 'monitortimeout=seconds' to change the timeout of # 'monitorurl'. Defaults to 'monitorinterval'. # # use 'forceddomain=name' to forcibly set the Host header # of requests forwarded to this peer. Useful in accelerator # setups where the server (peer) expects a certain domain # name and using redirectors to feed this domain name # is not feasible. # # use 'ssl' to indicate connections to this peer should # be SSL/TLS encrypted. # # use 'sslcert=/path/to/ssl/certificate' to specify a client # SSL certificate to use when connecting to this peer. # # use 'sslkey=/path/to/ssl/key' to specify the private SSL # key corresponding to sslcert above. If 'sslkey' is not # specified 'sslcert' is assumed to reference a # combined file containing both the certificate and the key. # # use sslversion=1|2|3|4 to specify the SSL version to use # when connecting to this peer # 1 = automatic (default) # 2 = SSL v2 only # 3 = SSL v3 only # 4 = TLS v1 only # # use sslcipher=... to specify the list of valid SSL ciphers # to use when connecting to this peer. # # use ssloptions=... to specify various SSL engine options: # NO_SSLv2 Disallow the use of SSLv2 # NO_SSLv3 Disallow the use of SSLv3 # NO_TLSv1 Disallow the use of TLSv1 # See src/ssl_support.c or the OpenSSL documentation for # a more complete list. # # use sslcafile=... to specify a file containing # additional CA certificates to use when verifying the # peer certificate. # # use sslcapath=... to specify a directory containing # additional CA certificates to use when verifying the # peer certificate. # # use sslcrlfile=... to specify a certificate revocation # list file to use when verifying the peer certificate. # # use sslflags=... to specify various flags modifying the # SSL implementation: # DONT_VERIFY_PEER # Accept certificates even if they fail to # verify. # NO_DEFAULT_CA # Don't use the default CA list built in # to OpenSSL. # # use ssldomain= to specify the peer name as advertised # in it's certificate. Used for verifying the correctness # of the received peer certificate. If not specified the # peer hostname will be used. # # use front-end-https to enable the "Front-End-Https: On" # header needed when using Squid as a SSL frontend in front # of Microsoft OWA. See MS KB document Q307347 for details # on this header. If set to auto the header will # only be added if the request is forwarded as a https:// # URL. # # use connection-auth=off to tell Squid that this peer does # not support Microsoft connection oriented authentication, # and any such challenges received from there should be # ignored. Default is auto to automatically determine the # status of the peer. # # use idle=n to specify a minimum number of idle connections # that should be kept open to this peer. # # use http11 to send requests using HTTP/1.1 to this peer. # Note: The HTTP/1.1 support is still incomplete, with an # internal HTTP/1.0 hop. As result 1xx responses will not # be forwarded. # #Default: # none # See http://www.privoxy.org/user-manual/config.html # Define Privoxy as parent proxy (without ICP) cache_peer 127.0.0.1 parent 8118 0 no-digest no-query default name=privoxy # Use LAN IP if Privoxy configured to listen on LAN #cache_peer 10.0.1.3 parent 8118 0 no-digest no-query default name=privoxy # TAG: cache_peer_domain # Use to limit the domains for which a neighbor cache will be # queried. Usage: # # cache_peer_domain cache-host domain [domain ...] # cache_peer_domain cache-host !domain # # For example, specifying # # cache_peer_domain parent.foo.net .edu # # has the effect such that UDP query packets are sent to # 'bigserver' only when the requested object exists on a # server in the .edu domain. Prefixing the domain name # with '!' means the cache will be queried for objects # NOT in that domain. # # NOTE: * Any number of domains may be given for a cache-host, # either on the same or separate lines. # * When multiple domains are given for a particular # cache-host, the first matched domain is applied. # * Cache hosts with no domain restrictions are queried # for all requests. # * There are no defaults. # * There is also a 'cache_peer_access' tag in the ACL # section. # #Default: # none # TAG: cache_peer_access # Similar to 'cache_peer_domain' but provides more flexibility by # using ACL elements. # # cache_peer_access cache-host allow|deny [!]aclname ... # # The syntax is identical to 'http_access' and the other lists of # ACL elements. See the comments for 'http_access' below, or # the Squid FAQ (http://www.squid-cache.org/FAQ/FAQ-10.html). # #Default: # none # TAG: neighbor_type_domain # usage: neighbor_type_domain neighbor parent|sibling domain domain ... # # Modifying the neighbor type for specific domains is now # possible. You can treat some domains differently than the the # default neighbor type specified on the 'cache_peer' line. # Normally it should only be necessary to list domains which # should be treated differently because the default neighbor type # applies for hostnames which do not match domains listed here. # #EXAMPLE: # cache_peer cache.foo.org parent 3128 3130 # neighbor_type_domain cache.foo.org sibling .com .net # neighbor_type_domain cache.foo.org sibling .au .de # #Default: # none # TAG: dead_peer_timeout (seconds) # This controls how long Squid waits to declare a peer cache # as "dead." If there are no ICP replies received in this # amount of time, Squid will declare the peer dead and not # expect to receive any further ICP replies. However, it # continues to send ICP queries, and will mark the peer as # alive upon receipt of the first subsequent ICP reply. # # This timeout also affects when Squid expects to receive ICP # replies from peers. If more than 'dead_peer' seconds have # passed since the last ICP reply was received, Squid will not # expect to receive an ICP reply on the next query. Thus, if # your time between requests is greater than this timeout, you # will see a lot of requests sent DIRECT to origin servers # instead of to your parents. # #Default: # dead_peer_timeout 10 seconds # TAG: hierarchy_stoplist # A list of words which, if found in a URL, cause the object to # be handled directly by this cache. In other words, use this # to not query neighbor caches for certain objects. You may # list this option multiple times. Note: never_direct overrides # this option. #We recommend you to use at least the following line. hierarchy_stoplist cgi-bin ? # MEMORY CACHE OPTIONS # ----------------------------------------------------------------------------- # TAG: cache_mem (bytes) # NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS SIZE. # IT ONLY PLACES A LIMIT ON HOW MUCH ADDITIONAL MEMORY SQUID WILL # USE AS A MEMORY CACHE OF OBJECTS. SQUID USES MEMORY FOR OTHER # THINGS AS WELL. SEE THE SQUID FAQ SECTION 8 FOR DETAILS. # # 'cache_mem' specifies the ideal amount of memory to be used # for: # * In-Transit objects # * Hot Objects # * Negative-Cached objects # # Data for these objects are stored in 4 KB blocks. This # parameter specifies the ideal upper limit on the total size of # 4 KB blocks allocated. In-Transit objects take the highest # priority. # # In-transit objects have priority over the others. When # additional space is needed for incoming data, negative-cached # and hot objects will be released. In other words, the # negative-cached and hot objects will fill up any unused space # not needed for in-transit objects. # # If circumstances require, this limit will be exceeded. # Specifically, if your incoming request rate requires more than # 'cache_mem' of memory to hold in-transit objects, Squid will # exceed this limit to satisfy the new requests. When the load # decreases, blocks will be freed until the high-water mark is # reached. Thereafter, blocks will be used to store hot # objects. # #Default: # cache_mem 8 MB cache_mem 32 MB # TAG: maximum_object_size_in_memory (bytes) # Objects greater than this size will not be attempted to kept in # the memory cache. This should be set high enough to keep objects # accessed frequently in memory to improve performance whilst low # enough to keep larger objects from hoarding cache_mem. # #Default: # maximum_object_size_in_memory 8 KB # TAG: memory_replacement_policy # The memory replacement policy parameter determines which # objects are purged from memory when memory space is needed. # # See cache_replacement_policy for details. # #Default: # memory_replacement_policy lru # DISK CACHE OPTIONS # ----------------------------------------------------------------------------- # TAG: cache_replacement_policy # The cache replacement policy parameter determines which # objects are evicted (replaced) when disk space is needed. # # lru : Squid's original list based LRU policy # heap GDSF : Greedy-Dual Size Frequency # heap LFUDA: Least Frequently Used with Dynamic Aging # heap LRU : LRU policy implemented using a heap # # Applies to any cache_dir lines listed below this. # # The LRU policies keeps recently referenced objects. # # The heap GDSF policy optimizes object hit rate by keeping smaller # popular objects in cache so it has a better chance of getting a # hit. It achieves a lower byte hit rate than LFUDA though since # it evicts larger (possibly popular) objects. # # The heap LFUDA policy keeps popular objects in cache regardless of # their size and thus optimizes byte hit rate at the expense of # hit rate since one large, popular object will prevent many # smaller, slightly less popular objects from being cached. # # Both policies utilize a dynamic aging mechanism that prevents # cache pollution that can otherwise occur with frequency-based # replacement policies. # # NOTE: if using the LFUDA replacement policy you should increase # the value of maximum_object_size above its default of 4096 KB to # to maximize the potential byte hit rate improvement of LFUDA. # # For more information about the GDSF and LFUDA cache replacement # policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html # and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html. # #Default: # cache_replacement_policy lru # TAG: cache_dir # Usage: # # cache_dir Type Directory-Name Fs-specific-data [options] # # You can specify multiple cache_dir lines to spread the # cache among different disk partitions. # # Type specifies the kind of storage system to use. Only "ufs" # is built by default. To enable any of the other storage systems # see the --enable-storeio configure option. # # 'Directory' is a top-level directory where cache swap # files will be stored. If you want to use an entire disk # for caching, this can be the mount-point directory. # The directory must exist and be writable by the Squid # process. Squid will NOT create this directory for you. # Only using COSS, a raw disk device or a stripe file can # be specified, but the configuration of the "cache_swap_log" # tag is mandatory. # # The ufs store type: # # "ufs" is the old well-known Squid storage format that has always # been there. # # cache_dir ufs Directory-Name Mbytes L1 L2 [options] # # 'Mbytes' is the amount of disk space (MB) to use under this # directory. The default is 100 MB. Change this to suit your # configuration. Do NOT put the size of your disk drive here. # Instead, if you want Squid to use the entire disk drive, # subtract 20% and use that value. # # 'Level-1' is the number of first-level subdirectories which # will be created under the 'Directory'. The default is 16. # # 'Level-2' is the number of second-level subdirectories which # will be created under each first-level directory. The default # is 256. # # The aufs store type: # # "aufs" uses the same storage format as "ufs", utilizing # POSIX-threads to avoid blocking the main Squid process on # disk-I/O. This was formerly known in Squid as async-io. # # cache_dir aufs Directory-Name Mbytes L1 L2 [options] # # see argument descriptions under ufs above # # The diskd store type: # # "diskd" uses the same storage format as "ufs", utilizing a # separate process to avoid blocking the main Squid process on # disk-I/O. # # cache_dir diskd Directory-Name Mbytes L1 L2 [options] [Q1=n] [Q2=n] # # see argument descriptions under ufs above # # Q1 specifies the number of unacknowledged I/O requests when Squid # stops opening new files. If this many messages are in the queues, # Squid won't open new files. Default is 64 # # Q2 specifies the number of unacknowledged messages when Squid # starts blocking. If this many messages are in the queues, # Squid blocks until it receives some replies. Default is 72 # # When Q1 < Q2 (the default), the cache directory is optimized # for lower response time at the expense of a decrease in hit # ratio. If Q1 > Q2, the cache directory is optimized for # higher hit ratio at the expense of an increase in response # time. # # The coss store type: # # block-size=n defines the "block size" for COSS cache_dir's. # Squid uses file numbers as block numbers. Since file numbers # are limited to 24 bits, the block size determines the maximum # size of the COSS partition. The default is 512 bytes, which # leads to a maximum cache_dir size of 512<<24, or 8 GB. Note # you should not change the COSS block size after Squid # has written some objects to the cache_dir. # # overwrite-percent=n defines the percentage of disk that COSS # must write to before a given object will be moved to the # current stripe. A value of "n" closer to 100 will cause COSS # to waste less disk space by having multiple copies of an object # on disk, but will increase the chances of overwriting a popular # object as COSS overwrites stripes. A value of "n" close to 0 # will cause COSS to keep all current objects in the current COSS # stripe at the expense of the hit rate. The default value of 50 # will allow any given object to be stored on disk a maximum of # 2 times. # # max-stripe-waste=n defines the maximum amount of space that COSS # will waste in a given stripe (in bytes). When COSS writes data # to disk, it will potentially waste up to "max-size" worth of disk # space for each 1MB of data written. If "max-size" is set to a # large value (ie >256k), this could potentially result in large # amounts of wasted disk space. Setting this value to a lower value # (ie 64k or 32k) will result in a COSS disk refusing to cache # larger objects until the COSS stripe has been filled to within # "max-stripe-waste" of the maximum size (1MB). # # membufs=n defines the number of "memory-only" stripes that COSS # will use. When an cache hit is performed on a COSS stripe before # COSS has reached the overwrite-percent value for that object, # COSS will use a series of memory buffers to hold the object in # while the data is sent to the client. This will define the maximum # number of memory-only buffers that COSS will use. The default value # is 10, which will use a maximum of 10MB of memory for buffers. # # maxfullbufs=n defines the maximum number of stripes a COSS partition # will have in memory waiting to be freed (either because the disk is # under load and the stripe is unwritten, or because clients are still # transferring data from objects using the memory). In order to try # and maintain a good hit rate under load, COSS will reserve the last # 2 full stripes for object hits. (ie a COSS cache_dir will reject # new objects when the number of full stripes is 2 less than maxfullbufs) # # The null store type: # # no options are allowed or required # # Common options: # # no-store, no new objects should be stored to this cache_dir # # min-size=n, refers to the min object size this storedir will accept. # It's used to restrict a storedir to only store large objects # (e.g. aufs) while other storedirs are optimized for smaller objects # (e.g. COSS). Defaults to 0. # # max-size=n, refers to the max object size this storedir supports. # It is used to initially choose the storedir to dump the object. # Note: To make optimal use of the max-size limits you should order # the cache_dir lines with the smallest max-size value first and the # ones with no max-size specification last. # # Note that for coss, max-size must be less than COSS_MEMBUF_SZ # (hard coded at 1 MB). # #Default: # cache_dir ufs /opt/local/var/squid/cache 100 16 256 # TAG: store_dir_select_algorithm # Set this to 'round-robin' as an alternative. # #Default: # store_dir_select_algorithm least-load # TAG: max_open_disk_fds # To avoid having disk as the I/O bottleneck Squid can optionally # bypass the on-disk cache if more than this amount of disk file # descriptors are open. # # A value of 0 indicates no limit. # #Default: # max_open_disk_fds 0 # TAG: minimum_object_size (bytes) # Objects smaller than this size will NOT be saved on disk. The # value is specified in kilobytes, and the default is 0 KB, which # means there is no minimum. # #Default: # minimum_object_size 0 KB # TAG: maximum_object_size (bytes) # Objects larger than this size will NOT be saved on disk. The # value is specified in kilobytes, and the default is 4MB. If # you wish to get a high BYTES hit ratio, you should probably # increase this (one 32 MB object hit counts for 3200 10KB # hits). If you wish to increase speed more than your want to # save bandwidth you should leave this low. # # NOTE: if using the LFUDA replacement policy you should increase # this value to maximize the byte hit rate improvement of LFUDA! # See replacement_policy below for a discussion of this policy. # #Default: # maximum_object_size 4096 KB # TAG: cache_swap_low (percent, 0-100) # TAG: cache_swap_high (percent, 0-100) # # The low- and high-water marks for cache object replacement. # Replacement begins when the swap (disk) usage is above the # low-water mark and attempts to maintain utilization near the # low-water mark. As swap utilization gets close to high-water # mark object eviction becomes more aggressive. If utilization is # close to the low-water mark less replacement is done each time. # # Defaults are 90% and 95%. If you have a large cache, 5% could be # hundreds of MB. If this is the case you may wish to set these # numbers closer together. # #Default: # cache_swap_low 90 # cache_swap_high 95 # TAG: update_headers on|off # By default Squid updates stored HTTP headers when receiving # a 304 response. Set this to off if you want to disable this # for disk I/O performance reasons. Disabling this VIOLATES the # HTTP standard, and could make you liable for problems which it # causes. # #Default: # update_headers on # LOGFILE OPTIONS # ----------------------------------------------------------------------------- # TAG: logformat # Usage: # # logformat # # Defines an access log format. # # The is a string with embedded % format codes # # % format codes all follow the same basic structure where all but # the formatcode is optional. Output strings are automatically escaped # as required according to their context and the output format # modifiers are usually not needed, but can be specified if an explicit # output format is desired. # # % ["|[|'|#] [-] [[0]width] [{argument}] formatcode # # " output in quoted string format # [ output in squid text log format as used by log_mime_hdrs # # output in URL quoted format # ' output as-is # # - left aligned # width field width. If starting with 0 the # output is zero padded # {arg} argument such as header name etc # # Format codes: # # >a Client source IP address # >A Client FQDN # >p Client source port # h Request header. Optional header name argument # on the format header[:[separator]element] # h # un User name # ul User name from authentication # ui User name from ident # us User name from SSL # ue User name from external acl helper # Hs HTTP status code # Ss Squid request status (TCP_MISS etc) # Sh Squid hierarchy status (DEFAULT_PARENT etc) # mt MIME content type # rm Request method (GET/POST etc) # ru Request URL # rp Request URL-Path excluding hostname # rv Request protocol version # ea Log string returned by external acl # st Request size including HTTP headers # st Request+Reply size including HTTP headers # sn Unique sequence number per log line entry # % a literal % character # # The default formats available (which do not need re-defining) are: # #logformat squid %ts.%03tu %6tr %>a %Ss/%03Hs %a %Ss/%03Hs %h] [%a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %h" "%{User-Agent}>h" %Ss:%Sh # #Default: # none # TAG: access_log # These files log client request activities. Has a line every HTTP or # ICP request. The format is: # access_log [ [acl acl ...]] # access_log none [acl acl ...]] # # Will log to the specified file using the specified format (which # must be defined in a logformat directive) those entries which match # ALL the acl's specified (which must be defined in acl clauses). # If no acl is specified, all requests will be logged to this file. # # To disable logging of a request use the filepath "none", in which case # a logformat name should not be specified. # # To log the request via syslog specify a filepath of "syslog": # # access_log syslog[:facility.priority] [format [acl1 [acl2 ....]]] # where facility could be any of: # authpriv, daemon, local0 .. local7 or user. # # And priority could be any of: # err, warning, notice, info, debug. access_log /opt/local/var/squid/logs/access.log squid # TAG: log_access allow|deny acl acl... # This options allows you to control which requests gets logged # to access.log (see access_log directive). Requests denied for # logging will also not be accounted for in performance counters. # #Default: # none # TAG: logfile_daemon # Specify the path to the logfile-writing daemon. This daemon is # used to write the access and store logs, if configured. # #Default: # logfile_daemon /opt/local/libexec/squid/logfile-daemon # TAG: cache_log # Cache logging file. This is where general information about # your cache's behavior goes. You can increase the amount of data # logged to this file with the "debug_options" tag below. # #Default: # cache_log /opt/local/var/squid/logs/cache.log # TAG: cache_store_log # Logs the activities of the storage manager. Shows which # objects are ejected from the cache, and which objects are # saved and for how long. To disable, enter "none". There are # not really utilities to analyze this data, so you can safely # disable it. # #Default: # cache_store_log /opt/local/var/squid/logs/store.log # TAG: cache_swap_state # Location for the cache "swap.state" file. This index file holds # the metadata of objects saved on disk. It is used to rebuild # the cache during startup. Normally this file resides in each # 'cache_dir' directory, but you may specify an alternate # pathname here. Note you must give a full filename, not just # a directory. Since this is the index for the whole object # list you CANNOT periodically rotate it! # # If %s can be used in the file name it will be replaced with a # a representation of the cache_dir name where each / is replaced # with '.'. This is needed to allow adding/removing cache_dir # lines when cache_swap_log is being used. # # If have more than one 'cache_dir', and %s is not used in the name # these swap logs will have names such as: # # cache_swap_log.00 # cache_swap_log.01 # cache_swap_log.02 # # The numbered extension (which is added automatically) # corresponds to the order of the 'cache_dir' lines in this # configuration file. If you change the order of the 'cache_dir' # lines in this file, these index files will NOT correspond to # the correct 'cache_dir' entry (unless you manually rename # them). We recommend you do NOT use this option. It is # better to keep these index files in each 'cache_dir' directory. # #Default: # none # TAG: logfile_rotate # Specifies the number of logfile rotations to make when you # type 'squid -k rotate'. The default is 10, which will rotate # with extensions 0 through 9. Setting logfile_rotate to 0 will # disable the file name rotation, but the logfiles are still closed # and re-opened. This will enable you to rename the logfiles # yourself just before sending the rotate signal. # # Note, the 'squid -k rotate' command normally sends a USR1 # signal to the running squid process. In certain situations # (e.g. on Linux with Async I/O), USR1 is used for other # purposes, so -k rotate uses another signal. It is best to get # in the habit of using 'squid -k rotate' instead of 'kill -USR1 # '. # #Default: # logfile_rotate 10 # TAG: emulate_httpd_log on|off # The Cache can emulate the log file format which many 'httpd' # programs use. To disable/enable this emulation, set # emulate_httpd_log to 'off' or 'on'. The default # is to use the native log format since it includes useful # information Squid-specific log analyzers use. # #Default: # emulate_httpd_log off # TAG: log_ip_on_direct on|off # Log the destination IP address in the hierarchy log tag when going # direct. Earlier Squid versions logged the hostname here. If you # prefer the old way set this to off. # #Default: # log_ip_on_direct on # TAG: mime_table # Pathname to Squid's MIME table. You shouldn't need to change # this, but the default file contains examples and formatting # information if you do. # #Default: # mime_table /opt/local/etc/squid/mime.conf # TAG: log_mime_hdrs on|off # The Cache can record both the request and the response MIME # headers for each HTTP transaction. The headers are encoded # safely and will appear as two bracketed fields at the end of # the access log (for either the native or httpd-emulated log # formats). To enable this logging set log_mime_hdrs to 'on'. # #Default: # log_mime_hdrs off # TAG: useragent_log # Note: This option is only available if Squid is rebuilt with the # --enable-useragent-log option # # Squid will write the User-Agent field from HTTP requests # to the filename specified here. By default useragent_log # is disabled. # #Default: # none # TAG: referer_log # Note: This option is only available if Squid is rebuilt with the # --enable-referer-log option # # Squid will write the Referer field from HTTP requests to the # filename specified here. By default referer_log is disabled. # Note that "referer" is actually a misspelling of "referrer" # however the misspelt version has been accepted into the HTTP RFCs # and we accept both. # #Default: # none # TAG: pid_filename # A filename to write the process-id to. To disable, enter "none". # #Default: # pid_filename /opt/local/var/run/squid/squid.pid # TAG: debug_options # Logging options are set as section,level where each source file # is assigned a unique section. Lower levels result in less # output, Full debugging (level 9) can result in a very large # log file, so be careful. The magic word "ALL" sets debugging # levels for all sections. We recommend normally running with # "ALL,1". # #Default: # debug_options ALL,1 # TAG: log_fqdn on|off # Turn this on if you wish to log fully qualified domain names # in the access.log. To do this Squid does a DNS lookup of all # IP's connecting to it. This can (in some situations) increase # latency, which makes your cache seem slower for interactive # browsing. # #Default: # log_fqdn off # TAG: client_netmask # A netmask for client addresses in logfiles and cachemgr output. # Change this to protect the privacy of your cache clients. # A netmask of 255.255.255.0 will log all IP's in that range with # the last digit set to '0'. # #Default: # client_netmask 255.255.255.255 # TAG: forward_log # Note: This option is only available if Squid is rebuilt with the # --enable-forward-log option # # Logs the server-side requests. # # This is currently work in progress. # #Default: # none # TAG: strip_query_terms # By default, Squid strips query terms from requested URLs before # logging. This protects your user's privacy. # #Default: # strip_query_terms on # TAG: buffered_logs on|off # cache.log log file is written with stdio functions, and as such # it can be buffered or unbuffered. By default it will be unbuffered. # Buffering it can speed up the writing slightly (though you are # unlikely to need to worry unless you run with tons of debugging # enabled in which case performance will suffer badly anyway..). # #Default: # buffered_logs off # TAG: netdb_filename # A filename where Squid stores it's netdb state between restarts. # To disable, enter "none". # #Default: # netdb_filename /opt/local/var/squid/logs/netdb.state # OPTIONS FOR FTP GATEWAYING # ----------------------------------------------------------------------------- # TAG: ftp_user # If you want the anonymous login password to be more informative # (and enable the use of picky ftp servers), set this to something # reasonable for your domain, like wwwuser@somewhere.net # # The reason why this is domainless by default is the # request can be made on the behalf of a user in any domain, # depending on how the cache is used. # Some ftp server also validate the email address is valid # (for example perl.com). # #Default: # ftp_user Squid@ # TAG: ftp_list_width # Sets the width of ftp listings. This should be set to fit in # the width of a standard browser. Setting this too small # can cut off long filenames when browsing ftp sites. # #Default: # ftp_list_width 32 # TAG: ftp_passive # If your firewall does not allow Squid to use passive # connections, turn off this option. # #Default: # ftp_passive on # TAG: ftp_sanitycheck # For security and data integrity reasons Squid by default performs # sanity checks of the addresses of FTP data connections ensure the # data connection is to the requested server. If you need to allow # FTP connections to servers using another IP address for the data # connection turn this off. # #Default: # ftp_sanitycheck on # TAG: ftp_telnet_protocol # The FTP protocol is officially defined to use the telnet protocol # as transport channel for the control connection. However, many # implementations are broken and does not respect this aspect of # the FTP protocol. # # If you have trouble accessing files with ASCII code 255 in the # path or similar problems involving this ASCII code you can # try setting this directive to off. If that helps, report to the # operator of the FTP server in question that their FTP server # is broken and does not follow the FTP standard. # #Default: # ftp_telnet_protocol on # OPTIONS FOR EXTERNAL SUPPORT PROGRAMS # ----------------------------------------------------------------------------- # TAG: diskd_program # Specify the location of the diskd executable. # Note this is only useful if you have compiled in # diskd as one of the store io modules. # #Default: # diskd_program /opt/local/libexec/squid/diskd-daemon # TAG: unlinkd_program # Specify the location of the executable for file deletion process. # #Default: # unlinkd_program /opt/local/libexec/squid/unlinkd # TAG: pinger_program # Note: This option is only available if Squid is rebuilt with the # --enable-icmp option # # Specify the location of the executable for the pinger process. # #Default: # pinger_program /opt/local/libexec/squid/pinger # OPTIONS FOR URL REWRITING # ----------------------------------------------------------------------------- # TAG: storeurl_rewrite_program # Specify the location of the executable for the Store URL rewriter. # The Store URL rewriter allows URLs to be "normalised" ; mapping # multiple URLs to a single URL representation for cache operations. # # For example, if you request an object at: # # http://srv1.example.com/image.gif # # and a subsequent request for: # # http://srv2.example.com/image.gif # # then Squid will treat these both as different URLs and cache them # seperately. # # This is almost the normal case, but an increasing number of sites # distribute the same content between multiple frontend hosts. # The Store URL rewriter allows you to rewrite these URLs to one URL # to use for cache operations, but not -fetches-. Fetches are still # made from the original site, but stored with the store URL rewritten # URL as the store key. # # For each requested URL rewriter will receive on line with the format # # URL client_ip "/" fqdn user method urlgroup # [ kvpairs] # # In the future, the rewriter interface will be extended with # key=value pairs ("kvpairs" shown above). Rewriter programs # should be prepared to receive and possibly ignore additional # whitespace-separated tokens on each input line. # # And the rewriter may return a rewritten URL. The other components of # the request line does not need to be returned (ignored if they are). # # By default, a Store URL rewriter is not used. # # Please note - the normal URL rewriter rewrites Squid's _destination_ # URL - ie, what it fetches. The Store URL rewriter rewrites Squid's # _store_ URL - ie, what it uses to store and retrieve objects. # #Default: # none # TAG: storeurl_rewrite_children # # #Default: # storeurl_rewrite_children 5 # TAG: storeurl_rewrite_concurrency # # #Default: # storeurl_rewrite_concurrency 0 # TAG: url_rewrite_program # Specify the location of the executable for the URL rewriter. # Since they can perform almost any function there isn't one included. # # For each requested URL rewriter will receive on line with the format # # URL client_ip "/" fqdn user method urlgroup # [ kvpairs] # # In the future, the rewriter interface will be extended with # key=value pairs ("kvpairs" shown above). Rewriter programs # should be prepared to receive and possibly ignore additional # whitespace-separated tokens on each input line. # # And the rewriter may return a rewritten URL. The other components of # the request line does not need to be returned (ignored if they are). # # The rewriter can also indicate that a client-side redirect should # be performed to the new URL. This is done by prefixing the returned # URL with "301:" (moved permanently) or 302: (moved temporarily). # # It can also return a "urlgroup" that can subsequently be matched # in cache_peer_access and similar ACL driven rules. An urlgroup is # returned by prefixing the returned URL with "!urlgroup!". # # By default, a URL rewriter is not used. # #Default: # none # TAG: url_rewrite_children # The number of redirector processes to spawn. If you start # too few Squid will have to wait for them to process a backlog of # URLs, slowing it down. If you start too many they will use RAM # and other system resources. # #Default: # url_rewrite_children 5 # TAG: url_rewrite_concurrency # The number of requests each redirector helper can handle in # parallel. Defaults to 0 which indicates the redirector # is a old-style single threaded redirector. # # When this directive is set to a value >= 1 then the protocol # used to communicate with the helper is modified to include # a request ID in front of the request/response. The request # ID from the request must be echoed back with the response # to that request. # #Default: # url_rewrite_concurrency 0 # TAG: url_rewrite_host_header # By default Squid rewrites any Host: header in redirected # requests. If you are running an accelerator this may # not be a wanted effect of a redirector. # # WARNING: Entries are cached on the result of the URL rewriting # process, so be careful if you have domain-virtual hosts. # #Default: # url_rewrite_host_header on # TAG: url_rewrite_access # If defined, this access list specifies which requests are # sent to the redirector processes. By default all requests # are sent. # #Default: # none # TAG: storeurl_access # # #Default: # none # TAG: redirector_bypass # When this is 'on', a request will not go through the # redirector if all redirectors are busy. If this is 'off' # and the redirector queue grows too large, Squid will exit # with a FATAL error and ask you to increase the number of # redirectors. You should only enable this if the redirectors # are not critical to your caching system. If you use # redirectors for access control, and you enable this option, # users may have access to pages they should not # be allowed to request. # #Default: # redirector_bypass off # TAG: location_rewrite_program # Specify the location of the executable for the Location rewriter, # used to rewrite server generated redirects. Usually used in # conjunction with a url_rewrite_program # # For each Location header received the location rewriter will receive # one line with the format: # # location URL requested URL urlgroup # # And the rewriter may return a rewritten Location URL or a blank line. # The other components of the request line does not need to be returned # (ignored if they are). # # By default, a Location rewriter is not used. # #Default: # none # TAG: location_rewrite_children # The number of location rewriting processes to spawn. If you start # too few Squid will have to wait for them to process a backlog of # URLs, slowing it down. If you start too many they will use RAM # and other system resources. # #Default: # location_rewrite_children 5 # TAG: location_rewrite_concurrency # The number of requests each Location rewriter helper can handle in # parallel. Defaults to 0 which indicates that the helper # is a old-style singlethreaded helper. # #Default: # location_rewrite_concurrency 0 # TAG: location_rewrite_access # If defined, this access list specifies which requests are # sent to the location rewriting processes. By default all Location # headers are sent. # #Default: # none # OPTIONS FOR TUNING THE CACHE # ----------------------------------------------------------------------------- # TAG: cache # A list of ACL elements which, if matched, cause the request to # not be satisfied from the cache and the reply to not be cached. # In other words, use this to force certain objects to never be cached. # # You must use the word 'DENY' to indicate the ACL names which should # NOT be cached. # # Default is to allow all to be cached. # #Default: # none # TAG: max_stale time-units # This option puts an upper limit on how stale content Squid # will serve from the cache if cache validation fails. # #Default: # max_stale 1 week # TAG: refresh_pattern # usage: refresh_pattern [-i] regex min percent max [options] # # By default, regular expressions are CASE-SENSITIVE. To make # them case-insensitive, use the -i option. # # 'Min' is the time (in minutes) an object without an explicit # expiry time should be considered fresh. The recommended # value is 0, any higher values may cause dynamic applications # to be erroneously cached unless the application designer # has taken the appropriate actions. # # 'Percent' is a percentage of the objects age (time since last # modification age) an object without explicit expiry time # will be considered fresh. # # 'Max' is an upper limit on how long objects without an explicit # expiry time will be considered fresh. # # options: override-expire # override-lastmod # reload-into-ims # ignore-reload # ignore-no-cache # ignore-private # ignore-auth # stale-while-revalidate=NN # ignore-stale-while-revalidate # max-stale=NN # negative-ttl=NN # # override-expire enforces min age even if the server # sent an explicit expiry time (e.g., with the # Expires: header or Cache-Control: max-age). Doing this # VIOLATES the HTTP standard. Enabling this feature # could make you liable for problems which it causes. # # Note: this does not enforce staleness - it only extends # freshness / min. If the server returns a Expires time which # is longer than your max time, Squid will still consider # the object fresh for that period of time. # # override-lastmod enforces min age even on objects # that were modified recently. # # reload-into-ims changes client no-cache or ``reload'' # to If-Modified-Since requests. Doing this VIOLATES the # HTTP standard. Enabling this feature could make you # liable for problems which it causes. # # ignore-reload ignores a client no-cache or ``reload'' # header. Doing this VIOLATES the HTTP standard. Enabling # this feature could make you liable for problems which # it causes. # # ignore-no-cache ignores any ``Pragma: no-cache'' and # ``Cache-control: no-cache'' headers received from a server. # The HTTP RFC never allows the use of this (Pragma) header # from a server, only a client, though plenty of servers # send it anyway. # # ignore-private ignores any ``Cache-control: private'' # headers received from a server. Doing this VIOLATES # the HTTP standard. Enabling this feature could make you # liable for problems which it causes. # # ignore-auth caches responses to requests with authorization, # as if the originserver had sent ``Cache-control: public'' # in the response header. Doing this VIOLATES the HTTP standard. # Enabling this feature could make you liable for problems which # it causes. # # stale-while-revalidate=NN makes Squid perform an asyncronous # cache validation if the object isn't more stale than NN. # Doing this VIOLATES the HTTP standard. Enabling this # feature could make you liable for problems which it # causes. # # ignore-stale-while-revalidate makes Squid ignore any 'Cache-Control: # stale-while-revalidate=NN' headers received from a server. Can be # combined with stale-while-revalidate=NN to override the server provided # value. # # max-stale=NN provided a maximum staleness factor. Squid won't # serve objects more stale than this even if it failed to # validate the object. # # negative-ttl=NN overrides the global negative_ttl parameter # selectively for URLs matching this pattern (in seconds). # # Basically a cached object is: # # FRESH if expires < now, else STALE # STALE if age > max # FRESH if lm-factor < percent, else STALE # FRESH if age < min # else STALE # # The refresh_pattern lines are checked in the order listed here. # The first entry which matches is used. If none of the entries # match the default will be used. # # Note, you must uncomment all the default lines if you want # to change one. The default setting is only active if none is # used. # #Suggested default: refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 # TAG: quick_abort_min (KB) # TAG: quick_abort_max (KB) # TAG: quick_abort_pct (percent) # The cache by default continues downloading aborted requests # which are almost completed (less than 16 KB remaining). This # may be undesirable on slow (e.g. SLIP) links and/or very busy # caches. Impatient users may tie up file descriptors and # bandwidth by repeatedly requesting and immediately aborting # downloads. # # When the user aborts a request, Squid will check the # quick_abort values to the amount of data transfered until # then. # # If the transfer has less than 'quick_abort_min' KB remaining, # it will finish the retrieval. # # If the transfer has more than 'quick_abort_max' KB remaining, # it will abort the retrieval. # # If more than 'quick_abort_pct' of the transfer has completed, # it will finish the retrieval. # # If you do not want any retrieval to continue after the client # has aborted, set both 'quick_abort_min' and 'quick_abort_max' # to '0 KB'. # # If you want retrievals to always continue if they are being # cached set 'quick_abort_min' to '-1 KB'. # #Default: # quick_abort_min 16 KB # quick_abort_max 16 KB # quick_abort_pct 95 # TAG: read_ahead_gap buffer-size # The amount of data the cache will buffer ahead of what has been # sent to the client when retrieving an object from another server. # #Default: # read_ahead_gap 16 KB # TAG: negative_ttl time-units # Time-to-Live (TTL) for failed requests. Certain types of # failures (such as "connection refused" and "404 Not Found") are # negatively-cached for a configurable amount of time. The # default is 5 minutes. Note that this is different from # negative caching of DNS lookups. # #Default: # negative_ttl 5 minutes # TAG: positive_dns_ttl time-units # Upper limit on how long Squid will cache positive DNS responses. # Default is 6 hours (360 minutes). This directive must be set # larger than negative_dns_ttl. # #Default: # positive_dns_ttl 6 hours # TAG: negative_dns_ttl time-units # Time-to-Live (TTL) for negative caching of failed DNS lookups. # This also sets the lower cache limit on positive lookups. # Minimum value is 1 second, and it is not recommendable to go # much below 10 seconds. # #Default: # negative_dns_ttl 1 minute # TAG: range_offset_limit (bytes) # Sets a upper limit on how far into the the file a Range request # may be to cause Squid to prefetch the whole file. If beyond this # limit Squid forwards the Range request as it is and the result # is NOT cached. # # This is to stop a far ahead range request (lets say start at 17MB) # from making Squid fetch the whole object up to that point before # sending anything to the client. # # A value of -1 causes Squid to always fetch the object from the # beginning so it may cache the result. (2.0 style) # # A value of 0 causes Squid to never fetch more than the # client requested. (default) # #Default: # range_offset_limit 0 KB # TAG: minimum_expiry_time (seconds) # The minimum caching time according to (Expires - Date) # Headers Squid honors if the object can't be revalidated # defaults to 60 seconds. In reverse proxy enorinments it # might be desirable to honor shorter object lifetimes. It # is most likely better to make your server return a # meaningful Last-Modified header however. # #Default: # minimum_expiry_time 60 seconds # TAG: store_avg_object_size (kbytes) # Average object size, used to estimate number of objects your # cache can hold. The default is 13 KB. # #Default: # store_avg_object_size 13 KB # TAG: store_objects_per_bucket # Target number of objects per bucket in the store hash table. # Lowering this value increases the total number of buckets and # also the storage maintenance rate. The default is 20. # #Default: # store_objects_per_bucket 20 # HTTP OPTIONS # ----------------------------------------------------------------------------- # TAG: request_header_max_size (KB) # This specifies the maximum size for HTTP headers in a request. # Request headers are usually relatively small (about 512 bytes). # Placing a limit on the request header size will catch certain # bugs (for example with persistent connections) and possibly # buffer-overflow or denial-of-service attacks. # #Default: # request_header_max_size 20 KB # TAG: reply_header_max_size (KB) # This specifies the maximum size for HTTP headers in a reply. # Reply headers are usually relatively small (about 512 bytes). # Placing a limit on the reply header size will catch certain # bugs (for example with persistent connections) and possibly # buffer-overflow or denial-of-service attacks. # #Default: # reply_header_max_size 20 KB # TAG: request_body_max_size (KB) # This specifies the maximum size for an HTTP request body. # In other words, the maximum size of a PUT/POST request. # A user who attempts to send a request with a body larger # than this limit receives an "Invalid Request" error message. # If you set this parameter to a zero (the default), there will # be no limit imposed. # #Default: # request_body_max_size 0 KB # TAG: broken_posts # A list of ACL elements which, if matched, causes Squid to send # an extra CRLF pair after the body of a PUT/POST request. # # Some HTTP servers has broken implementations of PUT/POST, # and rely on an extra CRLF pair sent by some WWW clients. # # Quote from RFC2616 section 4.1 on this matter: # # Note: certain buggy HTTP/1.0 client implementations generate an # extra CRLF's after a POST request. To restate what is explicitly # forbidden by the BNF, an HTTP/1.1 client must not preface or follow # a request with an extra CRLF. # #Example: # acl buggy_server url_regex ^http://.... # broken_posts allow buggy_server # #Default: # none # TAG: upgrade_http0.9 # This access list controls when HTTP/0.9 responses is upgraded # to our current HTTP version. The default is to always upgrade. # # Some applications expect to be able to respond with non-HTTP # responses and clients gets confused if the response is upgraded. # For example SHOUTcast servers used for mp3 streaming. # # To enable some flexibility in detection of such applications # the first line of the response is available in the internal header # X-HTTP09-First-Line for use in the rep_header acl. # # Don't upgrade ShoutCast responses to HTTP acl shoutcast rep_header X-HTTP09-First-Line ^ICY.[0-9] upgrade_http0.9 deny shoutcast # TAG: via on|off # If set (default), Squid will include a Via header in requests and # replies as required by RFC2616. # #Default: # via on via off # TAG: cache_vary # When 'cache_vary' is set to off, response that have a # Vary header will not be stored in the cache. # #Default: # cache_vary on # TAG: broken_vary_encoding # Many servers have broken support for on-the-fly Content-Encoding, # returning the same ETag on both plain and gzip:ed variants. # Vary replies matching this access list will have the cache split # on the Accept-Encoding header of the request and not trusting the # ETag to be unique. # # Apache mod_gzip and mod_deflate known to be broken so don't trust # Apache to signal ETag correctly on such responses acl apache rep_header Server ^Apache broken_vary_encoding allow apache # TAG: collapsed_forwarding (on|off) # This option enables multiple requests for the same URI to be # processed as one request. Normally disabled to avoid increased # latency on dynamic content, but there can be benefit from enabling # this in accelerator setups where the web servers are the bottleneck # and reliable and returns mostly cacheable information. # #Default: # collapsed_forwarding off # TAG: refresh_stale_hit (time) # This option changes the refresh algorithm to allow concurrent # requests while an object is being refreshed to be processed as # cache hits if the object expired less than X seconds ago. Default # is 0 to disable this feature. This option is mostly interesting # in accelerator setups where a few objects is accessed very # frequently. # #Default: # refresh_stale_hit 0 seconds # TAG: ie_refresh on|off # Microsoft Internet Explorer up until version 5.5 Service # Pack 1 has an issue with transparent proxies, wherein it # is impossible to force a refresh. Turning this on provides # a partial fix to the problem, by causing all IMS-REFRESH # requests from older IE versions to check the origin server # for fresh content. This reduces hit ratio by some amount # (~10% in my experience), but allows users to actually get # fresh content when they want it. Note because Squid # cannot tell if the user is using 5.5 or 5.5SP1, the behavior # of 5.5 is unchanged from old versions of Squid (i.e. a # forced refresh is impossible). Newer versions of IE will, # hopefully, continue to have the new behavior and will be # handled based on that assumption. This option defaults to # the old Squid behavior, which is better for hit ratios but # worse for clients using IE, if they need to be able to # force fresh content. # #Default: # ie_refresh off # TAG: vary_ignore_expire on|off # Many HTTP servers supporting Vary gives such objects # immediate expiry time with no cache-control header # when requested by a HTTP/1.0 client. This option # enables Squid to ignore such expiry times until # HTTP/1.1 is fully implemented. # WARNING: This may eventually cause some varying # objects not intended for caching to get cached. # #Default: # vary_ignore_expire off # TAG: extension_methods # Squid only knows about standardized HTTP request methods. # You can add up to 20 additional "extension" methods here. # #Default: # none # TAG: request_entities # Squid defaults to deny GET and HEAD requests with request entities, # as the meaning of such requests are undefined in the HTTP standard # even if not explicitly forbidden. # # Set this directive to on if you have clients which insists # on sending request entities in GET or HEAD requests. But be warned # that there is server software (both proxies and web servers) which # can fail to properly process this kind of request which may make you # vulnerable to cache pollution attacks if enabled. # #Default: # request_entities off # TAG: header_access # Usage: header_access header_name allow|deny [!]aclname ... # # WARNING: Doing this VIOLATES the HTTP standard. Enabling # this feature could make you liable for problems which it # causes. # # This option replaces the old 'anonymize_headers' and the # older 'http_anonymizer' option with something that is much # more configurable. This new method creates a list of ACLs # for each header, allowing you very fine-tuned header # mangling. # # You can only specify known headers for the header name. # Other headers are reclassified as 'Other'. You can also # refer to all the headers with 'All'. # # For example, to achieve the same behavior as the old # 'http_anonymizer standard' option, you should use: # # header_access From deny all # header_access Referer deny all # header_access Server deny all # header_access User-Agent deny all # header_access WWW-Authenticate deny all # header_access Link deny all # # Or, to reproduce the old 'http_anonymizer paranoid' feature # you should use: # # header_access Allow allow all # header_access Authorization allow all # header_access WWW-Authenticate allow all # header_access Proxy-Authorization allow all # header_access Proxy-Authenticate allow all # header_access Cache-Control allow all # header_access Content-Encoding allow all # header_access Content-Length allow all # header_access Content-Type allow all # header_access Date allow all # header_access Expires allow all # header_access Host allow all # header_access If-Modified-Since allow all # header_access Last-Modified allow all # header_access Location allow all # header_access Pragma allow all # header_access Accept allow all # header_access Accept-Charset allow all # header_access Accept-Encoding allow all # header_access Accept-Language allow all # header_access Content-Language allow all # header_access Mime-Version allow all # header_access Retry-After allow all # header_access Title allow all # header_access Connection allow all # header_access Proxy-Connection allow all # header_access All deny all # # By default, all headers are allowed (no anonymizing is # performed). # #Default: # none # allow localnet headers header_access From allow localnet header_access Server allow localnet header_access Link allow localnet header_access Cache-Control allow localnet header_access X-Cache allow localnet header_access X-Cache-Lookup allow localnet header_access Via allow localnet header_access Forwarded-For allow localnet header_access X-Forwarded-For allow localnet header_access Pragma allow localnet # old 'http_anonymizer standard' header_access From deny all # allow Privoxy configuration to see the Referer (provides standard interface), block all else acl privoxy-config dstdomain config.privoxy.org p.p header_access Referer allow privoxy-config # forge Referer in Privoxy header_access Referer deny all header_access Server deny all # forge User-Agent beloiw and in Privoxy # header_access User-Agent deny all # this breaks web authentication -- do not use #! header_access WWW-Authenticate deny all header_access Link deny all # more privacy header_access X-Cache deny all header_access X-Cache-Lookup deny all header_access Via deny all header_access Forwarded-For deny all header_access X-Forwarded-For deny all header_access Pragma deny all #! These slow down browsing a lot -- do not use # header_access Cache-Control deny all # header_access Keep-Alive deny all # TAG: header_replace # Usage: header_replace header_name message # Example: header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit) # # This option allows you to change the contents of headers # denied with header_access above, by replacing them with # some fixed string. This replaces the old fake_user_agent # option. # # By default, headers are removed if denied. # #Default: # none header_access User-Agent deny all header_replace User-Agent Mozilla/5.0 (iPad; CPU OS 6_1 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10B141 Safari/8536.25 # TAG: relaxed_header_parser on|off|warn # In the default "on" setting Squid accepts certain forms # of non-compliant HTTP messages where it is unambiguous # what the sending application intended even if the message # is not correctly formatted. The messages is then normalized # to the correct form when forwarded by Squid. # # If set to "warn" then a warning will be emitted in cache.log # each time such HTTP error is encountered. # # If set to "off" then such HTTP errors will cause the request # or response to be rejected. # #Default: # relaxed_header_parser on # TAG: server_http11 on|off # This option enables the use ot HTTP/1.1 on outgoing "direct" requests. # See also the http11 cache_peer option. # Note: The HTTP/1.1 support is still incomplete, with an # internal HTTP/1.0 hop. As result 1xx responses will not # be forwarded. # #Default: # server_http11 off # TAG: ignore_expect_100 on|off # This option makes Squid ignore any Expect: 100-continue header present # in the request. # Note: Enabling this is a HTTP protocol violation, but some client may # not handle it well.. # #Default: # ignore_expect_100 off # TAG: external_refresh_check # This option defines an external helper for determining whether to # refresh a stale response. It will be called when Squid receives a # request for a cached response that is stale; the helper can either # confirm that the response is stale with a STALE response, or # extend the freshness of the response (thereby avoiding a refresh # check) with a FRESH response, along with a freshness=nnn keyword. # # external_refresh_check [options] FORMAT.. /path/to/helper [helper_args] # # If present, helper_args will be passed to the helper on the command # line verbatim. # # Options: # # children=n Number of processes to spawn to service external # refresh checks (default 5). # concurrency=n Concurrency level per process. Only used with # helpers capable of processing more than one query # at a time. # # When using the concurrency option, the protocol is changed by introducing # a query channel tag infront of the request/response. The query channel # tag is a number between 0 and concurrency-1. # # FORMAT specifications: # # %CACHE_URI The URI of the cached response # %RES{Header} HTTP response header value # %AGE The age of the cached response # # The request sent to the helper consists of the data in the format # specification in the order specified. # # The helper receives lines per the above format specification, and # returns lines starting with OK or ERR indicating the validity of # the request and optionally followed by additional keywords with # more details. URL escaping is used to protect each value in both # requests and responses. # # General result syntax: # # FRESH / STALE keyword=value ... # # Defined keywords: # # freshness=nnn The number of seconds to extend the freshness of # the response by. # log=string String to be logged in access.log. Available as # %ef in logformat specifications. # res{Header}=value # Value to update response headers with. If already # present, the supplied value completely replaces # the cached value. # # In the event of a helper-related error (e.g., overload), Squid # will always default to STALE. # #Default: # none # TIMEOUTS # ----------------------------------------------------------------------------- # TAG: forward_timeout time-units # This parameter specifies how long Squid should at most attempt in # finding a forwarding path for the request before giving up. # #Default: # forward_timeout 4 minutes # TAG: connect_timeout time-units # This parameter specifies how long to wait for the TCP connect to # the requested server or peer to complete before Squid should # attempt to find another path where to forward the request. # #Default: # connect_timeout 1 minute # TAG: peer_connect_timeout time-units # This parameter specifies how long to wait for a pending TCP # connection to a peer cache. The default is 30 seconds. You # may also set different timeout values for individual neighbors # with the 'connect-timeout' option on a 'cache_peer' line. # #Default: # peer_connect_timeout 30 seconds # TAG: read_timeout time-units # The read_timeout is applied on server-side connections. After # each successful read(), the timeout will be extended by this # amount. If no data is read again after this amount of time, # the request is aborted and logged with ERR_READ_TIMEOUT. The # default is 15 minutes. # #Default: # read_timeout 15 minutes # TAG: request_timeout # How long to wait for an HTTP request after initial # connection establishment. # #Default: # request_timeout 5 minutes # TAG: persistent_request_timeout # How long to wait for the next HTTP request on a persistent # connection after the previous request completes. # #Default: # persistent_request_timeout 2 minutes # TAG: client_lifetime time-units # The maximum amount of time a client (browser) is allowed to # remain connected to the cache process. This protects the Cache # from having a lot of sockets (and hence file descriptors) tied up # in a CLOSE_WAIT state from remote clients that go away without # properly shutting down (either because of a network failure or # because of a poor client implementation). The default is one # day, 1440 minutes. # # NOTE: The default value is intended to be much larger than any # client would ever need to be connected to your cache. You # should probably change client_lifetime only as a last resort. # If you seem to have many client connections tying up # filedescriptors, we recommend first tuning the read_timeout, # request_timeout, persistent_request_timeout and quick_abort values. # #Default: # client_lifetime 1 day # TAG: half_closed_clients # Some clients may shutdown the sending side of their TCP # connections, while leaving their receiving sides open. Sometimes, # Squid can not tell the difference between a half-closed and a # fully-closed TCP connection. By default, half-closed client # connections are kept open until a read(2) or write(2) on the # socket returns an error. Change this option to 'off' and Squid # will immediately close client connections when read(2) returns # "no more data to read." # #Default: # half_closed_clients on # TAG: pconn_timeout # Timeout for idle persistent connections to servers and other # proxies. # #Default: # pconn_timeout 1 minute # TAG: ident_timeout # Maximum time to wait for IDENT lookups to complete. # # If this is too high, and you enabled IDENT lookups from untrusted # users, you might be susceptible to denial-of-service by having # many ident requests going at once. # #Default: # ident_timeout 10 seconds # TAG: shutdown_lifetime time-units # When SIGTERM or SIGHUP is received, the cache is put into # "shutdown pending" mode until all active sockets are closed. # This value is the lifetime to set for all open descriptors # during shutdown mode. Any active clients after this many # seconds will receive a 'timeout' message. # #Default: # shutdown_lifetime 30 seconds # ADMINISTRATIVE PARAMETERS # ----------------------------------------------------------------------------- # TAG: cache_mgr # Email-address of local cache manager who will receive # mail if the cache dies. The default is "webmaster". # #Default: # cache_mgr webmaster # TAG: mail_from # From: email-address for mail sent when the cache dies. # The default is to use 'appname@unique_hostname'. # Default appname value is "squid", can be changed into # src/globals.h before building squid. # #Default: # none # TAG: mail_program # Email program used to send mail if the cache dies. # The default is "mail". The specified program must comply # with the standard Unix mail syntax: # mail-program recipient < mailfile # # Optional command line options can be specified. # #Default: # mail_program mail # TAG: cache_effective_user # If you start Squid as root, it will change its effective/real # UID/GID to the user specified below. The default is to change # to UID to squid. If you define cache_effective_user, but not # cache_effective_group, Squid sets the GID to the effective # user's default group ID (taken from the password file) and # supplementary group list from the from groups membership of # cache_effective_user. # #Default: # cache_effective_user squid # TAG: cache_effective_group # If you want Squid to run with a specific GID regardless of # the group memberships of the effective user then set this # to the group (or GID) you want Squid to run as. When set # all other group privileges of the effective user is ignored # and only this GID is effective. If Squid is not started as # root the user starting Squid must be member of the specified # group. # #Default: # none # TAG: httpd_suppress_version_string on|off # Suppress Squid version string info in HTTP headers and HTML error pages. # #Default: # httpd_suppress_version_string off # TAG: visible_hostname # If you want to present a special hostname in error messages, etc, # define this. Otherwise, the return value of gethostname() # will be used. If you have multiple caches in a cluster and # get errors about IP-forwarding you must set them to have individual # names with this setting. # #Default: # none visible_hostname mydomainname.com # TAG: unique_hostname # If you want to have multiple machines with the same # 'visible_hostname' you must give each machine a different # 'unique_hostname' so forwarding loops can be detected. # #Default: # none # TAG: hostname_aliases # A list of other DNS names your cache has. # #Default: # none # TAG: umask # Minimum umask which should be enforced while the proxy # is running, in addition to the umask set at startup. # # Note: Should start with a 0 to indicate the normal octal # representation of umasks # #Default: # umask 027 # OPTIONS FOR THE CACHE REGISTRATION SERVICE # ----------------------------------------------------------------------------- # # This section contains parameters for the (optional) cache # announcement service. This service is provided to help # cache administrators locate one another in order to join or # create cache hierarchies. # # An 'announcement' message is sent (via UDP) to the registration # service by Squid. By default, the announcement message is NOT # SENT unless you enable it with 'announce_period' below. # # The announcement message includes your hostname, plus the # following information from this configuration file: # # http_port # icp_port # cache_mgr # # All current information is processed regularly and made # available on the Web at http://www.ircache.net/Cache/Tracker/. # TAG: announce_period # This is how frequently to send cache announcements. The # default is `0' which disables sending the announcement # messages. # # To enable announcing your cache, just uncomment the line # below. # #Default: # announce_period 0 # #To enable announcing your cache, just uncomment the line below. #announce_period 1 day # TAG: announce_host # TAG: announce_file # TAG: announce_port # announce_host and announce_port set the hostname and port # number where the registration message will be sent. # # Hostname will default to 'tracker.ircache.net' and port will # default default to 3131. If the 'filename' argument is given, # the contents of that file will be included in the announce # message. # #Default: # announce_host tracker.ircache.net # announce_port 3131 # HTTPD-ACCELERATOR OPTIONS # ----------------------------------------------------------------------------- # TAG: httpd_accel_no_pmtu_disc on|off # In many setups of transparently intercepting proxies Path-MTU # discovery can not work on traffic towards the clients. This is # the case when the intercepting device does not fully track # connections and fails to forward ICMP must fragment messages # to the cache server. # # If you have such setup and experience that certain clients # sporadically hang or never complete requests set this to on. # #Default: # httpd_accel_no_pmtu_disc off # DELAY POOL PARAMETERS # ----------------------------------------------------------------------------- # TAG: delay_pools # This represents the number of delay pools to be used. For example, # if you have one class 2 delay pool and one class 3 delays pool, you # have a total of 2 delay pools. # #Default: # delay_pools 0 # TAG: delay_class # This defines the class of each delay pool. There must be exactly one # delay_class line for each delay pool. For example, to define two # delay pools, one of class 2 and one of class 3, the settings above # and here would be: # #Example: # delay_pools 2 # 2 delay pools # delay_class 1 2 # pool 1 is a class 2 pool # delay_class 2 3 # pool 2 is a class 3 pool # # The delay pool classes are: # # class 1 Everything is limited by a single aggregate # bucket. # # class 2 Everything is limited by a single aggregate # bucket as well as an "individual" bucket chosen # from bits 25 through 32 of the IP address. # # class 3 Everything is limited by a single aggregate # bucket as well as a "network" bucket chosen # from bits 17 through 24 of the IP address and a # "individual" bucket chosen from bits 17 through # 32 of the IP address. # # NOTE: If an IP address is a.b.c.d # -> bits 25 through 32 are "d" # -> bits 17 through 24 are "c" # -> bits 17 through 32 are "c * 256 + d" # #Default: # none # TAG: delay_access # This is used to determine which delay pool a request falls into. # # delay_access is sorted per pool and the matching starts with pool 1, # then pool 2, ..., and finally pool N. The first delay pool where the # request is allowed is selected for the request. If it does not allow # the request to any pool then the request is not delayed (default). # # For example, if you want some_big_clients in delay # pool 1 and lotsa_little_clients in delay pool 2: # #Example: # delay_access 1 allow some_big_clients # delay_access 1 deny all # delay_access 2 allow lotsa_little_clients # delay_access 2 deny all # #Default: # none # TAG: delay_parameters # This defines the parameters for a delay pool. Each delay pool has # a number of "buckets" associated with it, as explained in the # description of delay_class. For a class 1 delay pool, the syntax is: # #delay_parameters pool aggregate # # For a class 2 delay pool: # #delay_parameters pool aggregate individual # # For a class 3 delay pool: # #delay_parameters pool aggregate network individual # # The variables here are: # # pool a pool number - ie, a number between 1 and the # number specified in delay_pools as used in # delay_class lines. # # aggregate the "delay parameters" for the aggregate bucket # (class 1, 2, 3). # # individual the "delay parameters" for the individual # buckets (class 2, 3). # # network the "delay parameters" for the network buckets # (class 3). # # A pair of delay parameters is written restore/maximum, where restore is # the number of bytes (not bits - modem and network speeds are usually # quoted in bits) per second placed into the bucket, and maximum is the # maximum number of bytes which can be in the bucket at any time. # # For example, if delay pool number 1 is a class 2 delay pool as in the # above example, and is being used to strictly limit each host to 64kbps # (plus overheads), with no overall limit, the line is: # #delay_parameters 1 -1/-1 8000/8000 # # Note that the figure -1 is used to represent "unlimited". # # And, if delay pool number 2 is a class 3 delay pool as in the above # example, and you want to limit it to a total of 256kbps (strict limit) # with each 8-bit network permitted 64kbps (strict limit) and each # individual host permitted 4800bps with a bucket maximum size of 64kb # to permit a decent web page to be downloaded at a decent speed # (if the network is not being limited due to overuse) but slow down # large downloads more significantly: # #delay_parameters 2 32000/32000 8000/8000 600/8000 # # There must be one delay_parameters line for each delay pool. # #Default: # none # TAG: delay_initial_bucket_level (percent, 0-100) # The initial bucket percentage is used to determine how much is put # in each bucket when squid starts, is reconfigured, or first notices # a host accessing it (in class 2 and class 3, individual hosts and # networks only have buckets associated with them once they have been # "seen" by squid). # #Default: # delay_initial_bucket_level 50 # WCCPv1 AND WCCPv2 CONFIGURATION OPTIONS # ----------------------------------------------------------------------------- # TAG: wccp_router # TAG: wccp2_router # Use this option to define your WCCP ``home'' router for # Squid. # # wccp_router supports a single WCCP(v1) router # # wccp2_router supports multiple WCCPv2 routers # # only one of the two may be used at the same time and defines # which version of WCCP to use. # #Default: # wccp_router 0.0.0.0 # TAG: wccp_version # This directive is only relevant if you need to set up WCCP(v1) # to some very old and end-of-life Cisco routers. In all other # setups it must be left unset or at the default setting. # It defines an internal version in the WCCP(v1) protocol, # with version 4 being the officially documented protocol. # # According to some users, Cisco IOS 11.2 and earlier only # support WCCP version 3. If you're using that or an earlier # version of IOS, you may need to change this value to 3, otherwise # do not specify this parameter. # #Default: # wccp_version 4 # TAG: wccp2_rebuild_wait # If this is enabled Squid will wait for the cache dir rebuild to finish # before sending the first wccp2 HereIAm packet # #Default: # wccp2_rebuild_wait on # TAG: wccp2_forwarding_method # WCCP2 allows the setting of forwarding methods between the # router/switch and the cache. Valid values are as follows: # # 1 - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) # 2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) # # Currently (as of IOS 12.4) cisco routers only support GRE. # Cisco switches only support the L2 redirect assignment method. # #Default: # wccp2_forwarding_method 1 # TAG: wccp2_return_method # WCCP2 allows the setting of return methods between the # router/switch and the cache for packets that the cache # decides not to handle. Valid values are as follows: # # 1 - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) # 2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) # # Currently (as of IOS 12.4) cisco routers only support GRE. # Cisco switches only support the L2 redirect assignment. # # If the "ip wccp redirect exclude in" command has been # enabled on the cache interface, then it is still safe for # the proxy server to use a l2 redirect method even if this # option is set to GRE. # #Default: # wccp2_return_method 1 # TAG: wccp2_assignment_method # WCCP2 allows the setting of methods to assign the WCCP hash # Valid values are as follows: # # 1 - Hash assignment # 2 - Mask assignment # # As a general rule, cisco routers support the hash assignment method # and cisco switches support the mask assignment method. # #Default: # wccp2_assignment_method 1 # TAG: wccp2_service # WCCP2 allows for multiple traffic services. There are two # types: "standard" and "dynamic". The standard type defines # one service id - http (id 0). The dynamic service ids can be from # 51 to 255 inclusive. In order to use a dynamic service id # one must define the type of traffic to be redirected; this is done # using the wccp2_service_info option. # # The "standard" type does not require a wccp2_service_info option, # just specifying the service id will suffice. # # MD5 service authentication can be enabled by adding # "password=" to the end of this service declaration. # # Examples: # # wccp2_service standard 0 # for the 'web-cache' standard service # wccp2_service dynamic 80 # a dynamic service type which will be # # fleshed out with subsequent options. # wccp2_service standard 0 password=foo # # #Default: # wccp2_service standard 0 # TAG: wccp2_service_info # Dynamic WCCPv2 services require further information to define the # traffic you wish to have diverted. # # The format is: # # wccp2_service_info protocol= flags=,.. # priority= ports=,.. # # The relevant WCCPv2 flags: # + src_ip_hash, dst_ip_hash # + source_port_hash, dst_port_hash # + src_ip_alt_hash, dst_ip_alt_hash # + src_port_alt_hash, dst_port_alt_hash # + ports_source # # The port list can be one to eight entries. # # Example: # # wccp2_service_info 80 protocol=tcp flags=src_ip_hash,ports_source # priority=240 ports=80 # # Note: the service id must have been defined by a previous # 'wccp2_service dynamic ' entry. # #Default: # none # TAG: wccp2_weight # Each cache server gets assigned a set of the destination # hash proportional to their weight. # #Default: # wccp2_weight 10000 # TAG: wccp_address # TAG: wccp2_address # Use this option if you require WCCP to use a specific # interface address. # # The default behavior is to not bind to any specific address. # #Default: # wccp_address 0.0.0.0 # wccp2_address 0.0.0.0 # PERSISTENT CONNECTION HANDLING # ----------------------------------------------------------------------------- # # Also see "pconn_timeout" in the TIMEOUTS section # TAG: client_persistent_connections # TAG: server_persistent_connections # Persistent connection support for clients and servers. By # default, Squid uses persistent connections (when allowed) # with its clients and servers. You can use these options to # disable persistent connections with clients and/or servers. # #Default: # client_persistent_connections on # server_persistent_connections on # TAG: persistent_connection_after_error # With this directive the use of persistent connections after # HTTP errors can be disabled. Useful if you have clients # who fail to handle errors on persistent connections proper. # #Default: # persistent_connection_after_error off # TAG: detect_broken_pconn # Some servers have been found to incorrectly signal the use # of HTTP/1.0 persistent connections even on replies not # compatible, causing significant delays. This server problem # has mostly been seen on redirects. # # By enabling this directive Squid attempts to detect such # broken replies and automatically assume the reply is finished # after 10 seconds timeout. # #Default: # detect_broken_pconn off # CACHE DIGEST OPTIONS # ----------------------------------------------------------------------------- # TAG: digest_generation # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests option # # This controls whether the server will generate a Cache Digest # of its contents. # #Default: # digest_generation on # TAG: digest_bits_per_entry # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests option # # This is the number of bits of the server's Cache Digest which # will be associated with the Digest entry for a given HTTP # Method and URL (public key) combination. The default is 5. # #Default: # digest_bits_per_entry 5 # TAG: digest_rebuild_period (seconds) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests option # # This is the wait time between Cache Digest rebuilds. # #Default: # digest_rebuild_period 1 hour # TAG: digest_rewrite_period (seconds) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests option # # This is the wait time between Cache Digest writes to disk. # #Default: # digest_rewrite_period 1 hour # TAG: digest_swapout_chunk_size (bytes) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests option # # This is the number of bytes of the Cache Digest to write to # disk at a time. It defaults to 4096 bytes (4KB), the Squid # default swap page. # #Default: # digest_swapout_chunk_size 4096 bytes # TAG: digest_rebuild_chunk_percentage (percent, 0-100) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests option # # This is the percentage of the Cache Digest to be scanned at a # time. By default it is set to 10% of the Cache Digest. # #Default: # digest_rebuild_chunk_percentage 10 # SNMP OPTIONS # ----------------------------------------------------------------------------- # TAG: snmp_port # Note: This option is only available if Squid is rebuilt with the # --enable-snmp option # # Squid can now serve statistics and status information via SNMP. # By default it listens to port 3401 on the machine. If you don't # wish to use SNMP, set this to "0". # #Default: # snmp_port 3401 # TAG: snmp_access # Note: This option is only available if Squid is rebuilt with the # --enable-snmp option # # Allowing or denying access to the SNMP port. # # All access to the agent is denied by default. # usage: # # snmp_access allow|deny [!]aclname ... # #Example: # snmp_access allow snmppublic localhost # snmp_access deny all # #Default: # snmp_access deny all # TAG: snmp_incoming_address # Note: This option is only available if Squid is rebuilt with the # --enable-snmp option # # TAG: snmp_outgoing_address # Note: This option is only available if Squid is rebuilt with the # --enable-snmp option # # Just like 'udp_incoming_address' above, but for the SNMP port. # # snmp_incoming_address is used for the SNMP socket receiving # messages from SNMP agents. # snmp_outgoing_address is used for SNMP packets returned to SNMP # agents. # # The default snmp_incoming_address (0.0.0.0) is to listen on all # available network interfaces. # # If snmp_outgoing_address is set to 255.255.255.255 (the default) # it will use the same socket as snmp_incoming_address. Only # change this if you want to have SNMP replies sent using another # address than where this Squid listens for SNMP queries. # # NOTE, snmp_incoming_address and snmp_outgoing_address can not have # the same value since they both use port 3401. # #Default: # snmp_incoming_address 0.0.0.0 # snmp_outgoing_address 255.255.255.255 # ICP OPTIONS # ----------------------------------------------------------------------------- # TAG: icp_port # The port number where Squid sends and receives ICP queries to # and from neighbor caches. Default is 3130. To disable use # "0". May be overridden with -u on the command line. # #Default: # icp_port 3130 # TAG: htcp_port # Note: This option is only available if Squid is rebuilt with the # --enable-htcp option # # The port number where Squid sends and receives HTCP queries to # and from neighbor caches. Default is 4827. To disable use # "0". # #Default: # htcp_port 4827 # TAG: log_icp_queries on|off # If set, ICP queries are logged to access.log. You may wish # do disable this if your ICP load is VERY high to speed things # up or to simplify log analysis. # #Default: # log_icp_queries on # TAG: udp_incoming_address # udp_incoming_address is used for UDP packets received from other # caches. # # The default behavior is to not bind to any specific address. # # Only change this if you want to have all UDP queries received on # a specific interface/address. # # NOTE: udp_incoming_address is used by the ICP, HTCP, and DNS # modules. Altering it will affect all of them in the same manner. # # see also; udp_outgoing_address # # NOTE, udp_incoming_address and udp_outgoing_address can not # have the same value since they both use the same port. # #Default: # udp_incoming_address 0.0.0.0 # TAG: udp_outgoing_address # udp_outgoing_address is used for UDP packets sent out to other # caches. # # The default behavior is to not bind to any specific address. # # Instead it will use the same socket as udp_incoming_address. # Only change this if you want to have UDP queries sent using another # address than where this Squid listens for UDP queries from other # caches. # # NOTE: udp_outgoing_address is used by the ICP, HTCP, and DNS # modules. Altering it will affect all of them in the same manner. # # see also; udp_incoming_address # # NOTE, udp_incoming_address and udp_outgoing_address can not # have the same value since they both use the same port. # #Default: # udp_outgoing_address 255.255.255.255 # TAG: icp_hit_stale on|off # If you want to return ICP_HIT for stale cache objects, set this # option to 'on'. If you have sibling relationships with caches # in other administrative domains, this should be 'off'. If you only # have sibling relationships with caches under your control, # it is probably okay to set this to 'on'. # If set to 'on', your siblings should use the option "allow-miss" # on their cache_peer lines for connecting to you. # #Default: # icp_hit_stale off # TAG: minimum_direct_hops # If using the ICMP pinging stuff, do direct fetches for sites # which are no more than this many hops away. # #Default: # minimum_direct_hops 4 # TAG: minimum_direct_rtt # If using the ICMP pinging stuff, do direct fetches for sites # which are no more than this many rtt milliseconds away. # #Default: # minimum_direct_rtt 400 # TAG: netdb_low # TAG: netdb_high # The low and high water marks for the ICMP measurement # database. These are counts, not percents. The defaults are # 900 and 1000. When the high water mark is reached, database # entries will be deleted until the low mark is reached. # #Default: # netdb_low 900 # netdb_high 1000 # TAG: netdb_ping_period # The minimum period for measuring a site. There will be at # least this much delay between successive pings to the same # network. The default is five minutes. # #Default: # netdb_ping_period 5 minutes # TAG: query_icmp on|off # If you want to ask your peers to include ICMP data in their ICP # replies, enable this option. # # If your peer has configured Squid (during compilation) with # '--enable-icmp' that peer will send ICMP pings to origin server # sites of the URLs it receives. If you enable this option the # ICP replies from that peer will include the ICMP data (if available). # Then, when choosing a parent cache, Squid will choose the parent with # the minimal RTT to the origin server. When this happens, the # hierarchy field of the access.log will be # "CLOSEST_PARENT_MISS". This option is off by default. # #Default: # query_icmp off # TAG: test_reachability on|off # When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH # instead of ICP_MISS if the target host is NOT in the ICMP # database, or has a zero RTT. # #Default: # test_reachability off # TAG: icp_query_timeout (msec) # Normally Squid will automatically determine an optimal ICP # query timeout value based on the round-trip-time of recent ICP # queries. If you want to override the value determined by # Squid, set this 'icp_query_timeout' to a non-zero value. This # value is specified in MILLISECONDS, so, to use a 2-second # timeout (the old default), you would write: # # icp_query_timeout 2000 # #Default: # icp_query_timeout 0 # TAG: maximum_icp_query_timeout (msec) # Normally the ICP query timeout is determined dynamically. But # sometimes it can lead to very large values (say 5 seconds). # Use this option to put an upper limit on the dynamic timeout # value. Do NOT use this option to always use a fixed (instead # of a dynamic) timeout value. To set a fixed timeout see the # 'icp_query_timeout' directive. # #Default: # maximum_icp_query_timeout 2000 # TAG: minimum_icp_query_timeout (msec) # Normally the ICP query timeout is determined dynamically. But # sometimes it can lead to very small timeouts, even lower than # the normal latency variance on your link due to traffic. # Use this option to put an lower limit on the dynamic timeout # value. Do NOT use this option to always use a fixed (instead # of a dynamic) timeout value. To set a fixed timeout see the # 'icp_query_timeout' directive. # #Default: # minimum_icp_query_timeout 5 # MULTICAST ICP OPTIONS # ----------------------------------------------------------------------------- # TAG: mcast_groups # This tag specifies a list of multicast groups which your server # should join to receive multicasted ICP queries. # # NOTE! Be very careful what you put here! Be sure you # understand the difference between an ICP _query_ and an ICP # _reply_. This option is to be set only if you want to RECEIVE # multicast queries. Do NOT set this option to SEND multicast # ICP (use cache_peer for that). ICP replies are always sent via # unicast, so this option does not affect whether or not you will # receive replies from multicast group members. # # You must be very careful to NOT use a multicast address which # is already in use by another group of caches. # # If you are unsure about multicast, please read the Multicast # chapter in the Squid FAQ (http://www.squid-cache.org/FAQ/). # # Usage: mcast_groups 239.128.16.128 224.0.1.20 # # By default, Squid doesn't listen on any multicast groups. # #Default: # none # TAG: mcast_miss_addr # Note: This option is only available if Squid is rebuilt with the # --enable-multicast-miss option # # If you enable this option, every "cache miss" URL will # be sent out on the specified multicast address. # # Do not enable this option unless you are are absolutely # certain you understand what you are doing. # #Default: # mcast_miss_addr 255.255.255.255 # TAG: mcast_miss_ttl # Note: This option is only available if Squid is rebuilt with the # --enable-multicast-miss option # # This is the time-to-live value for packets multicasted # when multicasting off cache miss URLs is enabled. By # default this is set to 'site scope', i.e. 16. # #Default: # mcast_miss_ttl 16 # TAG: mcast_miss_port # Note: This option is only available if Squid is rebuilt with the # --enable-multicast-miss option # # This is the port number to be used in conjunction with # 'mcast_miss_addr'. # #Default: # mcast_miss_port 3135 # TAG: mcast_miss_encode_key # Note: This option is only available if Squid is rebuilt with the # --enable-multicast-miss option # # The URLs that are sent in the multicast miss stream are # encrypted. This is the encryption key. # #Default: # mcast_miss_encode_key XXXXXXXXXXXXXXXX # TAG: mcast_icp_query_timeout (msec) # For multicast peers, Squid regularly sends out ICP "probes" to # count how many other peers are listening on the given multicast # address. This value specifies how long Squid should wait to # count all the replies. The default is 2000 msec, or 2 # seconds. # #Default: # mcast_icp_query_timeout 2000 # INTERNAL ICON OPTIONS # ----------------------------------------------------------------------------- # TAG: icon_directory # Where the icons are stored. These are normally kept in # /opt/local/share/squid/icons # #Default: # icon_directory /opt/local/share/squid/icons # TAG: global_internal_static # This directive controls is Squid should intercept all requests for # /squid-internal-static/ no matter which host the URL is requesting # (default on setting), or if nothing special should be done for # such URLs (off setting). The purpose of this directive is to make # icons etc work better in complex cache hierarchies where it may # not always be possible for all corners in the cache mesh to reach # the server generating a directory listing. # #Default: # global_internal_static on # TAG: short_icon_urls # If this is enabled Squid will use short URLs for icons. # # If off the URLs for icons will always be absolute URLs # including the proxy name and port. # #Default: # short_icon_urls off # ERROR PAGE OPTIONS # ----------------------------------------------------------------------------- # TAG: error_directory # If you wish to create your own versions of the default # (English) error files, either to customize them to suit your # language or company copy the template English files to another # directory and point this tag at them. # # The squid developers are interested in making squid available in # a wide variety of languages. If you are making translations for a # langauge that Squid does not currently provide please consider # contributing your translation back to the project. # #Default: # error_directory /opt/local/share/squid/errors/English # TAG: error_map # Map errors to custom messages # # error_map message_url http_status ... # # http_status ... is a list of HTTP status codes or Squid error # messages. # # Use in accelerators to substitute the error messages returned # by servers with other custom errors. # # error_map http://your.server/error/404.shtml 404 # # Requests for error messages is a GET request for the configured # URL with the following special headers # # X-Error-Status: The received HTTP status code (i.e. 404) # X-Request-URI: The requested URI where the error occurred # # In Addition the following headers are forwarded from the client # request: # # User-Agent, Cookie, X-Forwarded-For, Via, Authorization, # Accept, Referer # # And the following headers from the server reply: # # Server, Via, Location, Content-Location # # The reply returned to the client will carry the original HTTP # headers from the real error message, but with the reply body # of the configured error message. # # #Default: # none # TAG: err_html_text # HTML text to include in error messages. Make this a "mailto" # URL to your admin address, or maybe just a link to your # organizations Web page. # # To include this in your error messages, you must rewrite # the error template files (found in the "errors" directory). # Wherever you want the 'err_html_text' line to appear, # insert a %L tag in the error template file. # #Default: # none # TAG: deny_info # Usage: deny_info err_page_name acl # or deny_info http://... acl # Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys # # This can be used to return a ERR_ page for requests which # do not pass the 'http_access' rules. Squid remembers the last # acl it evaluated in http_access, and if a 'deny_info' line exists # for that ACL Squid returns a corresponding error page. # # The acl is typically the last acl on the http_access deny line which # denied access. The exceptions to this rule are: # - When Squid needs to request authentication credentials. It's then # the first authentication related acl encountered # - When none of the http_access lines matches. It's then the last # acl processed on the last http_access line. # # You may use ERR_ pages that come with Squid or create your own pages # and put them into the configured errors/ directory. # # Alternatively you can specify an error URL. The browsers will # get redirected (302) to the specified URL. %s in the redirection # URL will be replaced by the requested URL. # # Alternatively you can tell Squid to reset the TCP connection # by specifying TCP_RESET. # #Default: # none # OPTIONS INFLUENCING REQUEST FORWARDING # ----------------------------------------------------------------------------- # TAG: nonhierarchical_direct # By default, Squid will send any non-hierarchical requests # (matching hierarchy_stoplist or not cacheable request type) direct # to origin servers. # # If you set this to off, Squid will prefer to send these # requests to parents. # # Note that in most configurations, by turning this off you will only # add latency to these request without any improvement in global hit # ratio. # # If you are inside an firewall see never_direct instead of # this directive. # #Default: # nonhierarchical_direct on # TAG: prefer_direct # Normally Squid tries to use parents for most requests. If you for some # reason like it to first try going direct and only use a parent if # going direct fails set this to on. # # By combining nonhierarchical_direct off and prefer_direct on you # can set up Squid to use a parent as a backup path if going direct # fails. # # Note: If you want Squid to use parents for all requests see # the never_direct directive. prefer_direct only modifies how Squid # acts on cacheable requests. # #Default: # prefer_direct off # TAG: ignore_ims_on_miss on|off # This options makes Squid ignore If-Modified-Since on # cache misses. This is useful while the cache is # mostly empty to more quickly have the cache populated. # #Default: # ignore_ims_on_miss off # TAG: always_direct # Usage: always_direct allow|deny [!]aclname ... # # Here you can use ACL elements to specify requests which should # ALWAYS be forwarded by Squid to the origin servers without using # any peers. For example, to always directly forward requests for # local servers ignoring any parents or siblings you may have use # something like: # # acl local-servers dstdomain my.domain.net # always_direct allow local-servers # # To always forward FTP requests directly, use # # acl FTP proto FTP # always_direct allow FTP # # NOTE: There is a similar, but opposite option named # 'never_direct'. You need to be aware that "always_direct deny # foo" is NOT the same thing as "never_direct allow foo". You # may need to use a deny rule to exclude a more-specific case of # some other rule. Example: # # acl local-external dstdomain external.foo.net # acl local-servers dstdomain .foo.net # always_direct deny local-external # always_direct allow local-servers # # NOTE: If your goal is to make the client forward the request # directly to the origin server bypassing Squid then this needs # to be done in the client configuration. Squid configuration # can only tell Squid how Squid should fetch the object. # # NOTE: This directive is not related to caching. The replies # is cached as usual even if you use always_direct. To not cache # the replies see no_cache. # # This option replaces some v1.1 options such as local_domain # and local_ip. # #Default: # none # acl local-servers dstdomain localhost # always_direct allow local-servers # See http://www.privoxy.org/user-manual/config.html # Define ACL for protocol FTP acl ftp proto FTP always_direct allow ftp # Uncomment and add your LAN domain if you're running your own DNS #acl mydomain dstdomain .mydomainname.com #always_direct allow mydomain # Do not forward SSL requests to Privoxy always_direct allow SSL_ports # Do not forward App Store updates acl app-store-browser browser MacAppStore.+ always_direct allow app-store-browser acl app-store-x-header req_header X-Apple-Store-Front .+ always_direct allow app-store-x-header # http://help.getbusi.com/kb/getbusi-alert-advance/itunes-and-app-store-content-not-loading-through-getbusi acl app-store-domains dstdomain \ .mzstatic.com \ .itunes.apple.com \ .phobos.apple.com.edgesuite.net \ .mzstatic.com.edgesuite.net \ .phobos.apple.com \ swdist.apple.com \ swscan.apple.com \ .symcb.com \ .symcd.com always_direct allow app-store-domains # TAG: never_direct # Usage: never_direct allow|deny [!]aclname ... # # never_direct is the opposite of always_direct. Please read # the description for always_direct if you have not already. # # With 'never_direct' you can use ACL elements to specify # requests which should NEVER be forwarded directly to origin # servers. For example, to force the use of a proxy for all # requests, except those in your local domain use something like: # # acl local-servers dstdomain .foo.net # acl all src 0.0.0.0/0.0.0.0 # never_direct deny local-servers # never_direct allow all # # or if Squid is inside a firewall and there are local intranet # servers inside the firewall use something like: # # acl local-intranet dstdomain .foo.net # acl local-external dstdomain external.foo.net # always_direct deny local-external # always_direct allow local-intranet # never_direct allow all # # This option replaces some v1.1 options such as inside_firewall # and firewall_ip. # #Default: # none # See http://www.privoxy.org/user-manual/config.html # Forward all the rest to Privoxy never_direct allow all # ADVANCED NETWORKING OPTIONS # ----------------------------------------------------------------------------- # TAG: max_filedescriptors # The maximum number of filedescriptors supported. # # The default "0" means Squid inherits the current ulimit setting. # # Note: Changing this requires a restart of Squid. Also # not all comm loops supports values larger than --with-maxfd. # #Default: # max_filedescriptors 0 # TAG: accept_filter # FreeBSD: # # The name of an accept(2) filter to install on Squid's # listen socket(s). This feature is perhaps specific to # FreeBSD and requires support in the kernel. # # The 'httpready' filter delays delivering new connections # to Squid until a full HTTP request has been received. # See the accf_http(9) man page for details. # # The 'dataready' filter delays delivering new connections # to Squid until there is some data to process. # See the accf_dataready(9) man page for details. # # Linux: # # The 'data' filter delays delivering of new connections # to Squid until there is some data to process by TCP_ACCEPT_DEFER. # You may optionally specify a number of seconds to wait by # 'data=N' where N is the number of seconds. Defaults to 30 # if not specified. See the tcp(7) man page for details. #EXAMPLE: ## FreeBSD #accept_filter httpready ## Linux #accept_filter data # #Default: # none # TAG: tcp_recv_bufsize (bytes) # Size of receive buffer to set for TCP sockets. Probably just # as easy to change your kernel's default. Set to zero to use # the default buffer size. # #Default: # tcp_recv_bufsize 0 bytes # TAG: incoming_rate # This directive controls how aggressive Squid should accept new # connections compared to processing existing connections. # The lower number the more frequent Squid will look for new # incoming requests. # #Default: # incoming_rate 30 # DNS OPTIONS # ----------------------------------------------------------------------------- # TAG: check_hostnames # For security and stability reasons Squid by default checks # hostnames for Internet standard RFC compliance. If you do not want # Squid to perform these checks then turn this directive off. # #Default: # check_hostnames on # TAG: allow_underscore # Underscore characters is not strictly allowed in Internet hostnames # but nevertheless used by many sites. Set this to off if you want # Squid to be strict about the standard. # This check is performed only when check_hostnames is set to on. # #Default: # allow_underscore on # TAG: cache_dns_program # Note: This option is only available if Squid is rebuilt with the # --disable-internal-dns option # # Specify the location of the executable for dnslookup process. # #Default: # cache_dns_program /opt/local/libexec/squid/dnsserver # TAG: dns_children # Note: This option is only available if Squid is rebuilt with the # --disable-internal-dns option # # The number of processes spawn to service DNS name lookups. # For heavily loaded caches on large servers, you should # probably increase this value to at least 10. The maximum # is 32. The default is 5. # # You must have at least one dnsserver process. # #Default: # dns_children 5 # TAG: dns_retransmit_interval # Initial retransmit interval for DNS queries. The interval is # doubled each time all configured DNS servers have been tried. # # #Default: # dns_retransmit_interval 5 seconds # TAG: dns_timeout # DNS Query timeout. If no response is received to a DNS query # within this time all DNS servers for the queried domain # are assumed to be unavailable. # #Default: # dns_timeout 2 minutes # TAG: dns_defnames on|off # Normally the RES_DEFNAMES resolver option is disabled # (see res_init(3)). This prevents caches in a hierarchy # from interpreting single-component hostnames locally. To allow # Squid to handle single-component names, enable this option. # #Default: # dns_defnames off # TAG: dns_nameservers # Use this if you want to specify a list of DNS name servers # (IP addresses) to use instead of those given in your # /etc/resolv.conf file. # On Windows platforms, if no value is specified here or in # the /etc/resolv.conf file, the list of DNS name servers are # taken from the Windows registry, both static and dynamic DHCP # configurations are supported. # # Example: dns_nameservers 10.0.0.1 192.172.0.4 # #Default: # none # Google DNS dns_nameservers 8.8.8.8 4.4.4.4 # Use LAN IP with possible backup if you're running DNS yourself #dns_nameservers 10.0.1.3 8.8.8.8 # TAG: hosts_file # Location of the host-local IP name-address associations # database. Most Operating Systems have such a file on different # default locations: # - Un*X & Linux: /etc/hosts # - Windows NT/2000: %SystemRoot%\system32\drivers\etc\hosts # (%SystemRoot% value install default is c:\winnt) # - Windows XP/2003: %SystemRoot%\system32\drivers\etc\hosts # (%SystemRoot% value install default is c:\windows) # - Windows 9x/Me: %windir%\hosts # (%windir% value is usually c:\windows) # - Cygwin: /etc/hosts # # The file contains newline-separated definitions, in the # form ip_address_in_dotted_form name [name ...] names are # whitespace-separated. Lines beginning with an hash (#) # character are comments. # # The file is checked at startup and upon configuration. # If set to 'none', it won't be checked. # If append_domain is used, that domain will be added to # domain-local (i.e. not containing any dot character) host # definitions. # #Default: # hosts_file /etc/hosts hosts_file /etc/hosts-hphosts # TAG: dns_testnames # The DNS tests exit as soon as the first site is successfully looked up # # This test can be disabled with the -D command line option. # #Default: # dns_testnames netscape.com internic.net nlanr.net microsoft.com # TAG: append_domain # Appends local domain name to hostnames without any dots in # them. append_domain must begin with a period. # # Be warned there are now Internet names with no dots in # them using only top-domain names, so setting this may # cause some Internet sites to become unavailable. # #Example: # append_domain .yourdomain.com # #Default: # none # TAG: ignore_unknown_nameservers # By default Squid checks that DNS responses are received # from the same IP addresses they are sent to. If they # don't match, Squid ignores the response and writes a warning # message to cache.log. You can allow responses from unknown # nameservers by setting this option to 'off'. # #Default: # ignore_unknown_nameservers on # TAG: ipcache_size (number of entries) # TAG: ipcache_low (percent) # TAG: ipcache_high (percent) # The size, low-, and high-water marks for the IP cache. # #Default: # ipcache_size 1024 # ipcache_low 90 # ipcache_high 95 ipcache_size 16384 # TAG: fqdncache_size (number of entries) # Maximum number of FQDN cache entries. # #Default: # fqdncache_size 1024 # fqdncache_size 131072 fqdncache_size 1048576 # MISCELLANEOUS # ----------------------------------------------------------------------------- # TAG: memory_pools on|off # If set, Squid will keep pools of allocated (but unused) memory # available for future use. If memory is a premium on your # system and you believe your malloc library outperforms Squid # routines, disable this. # #Default: # memory_pools on # TAG: memory_pools_limit (bytes) # Used only with memory_pools on: # memory_pools_limit 50 MB # # If set to a non-zero value, Squid will keep at most the specified # limit of allocated (but unused) memory in memory pools. All free() # requests that exceed this limit will be handled by your malloc # library. Squid does not pre-allocate any memory, just safe-keeps # objects that otherwise would be free()d. Thus, it is safe to set # memory_pools_limit to a reasonably high value even if your # configuration will use less memory. # # If set to zero, Squid will keep all memory it can. That is, there # will be no limit on the total amount of memory used for safe-keeping. # # To disable memory allocation optimization, do not set # memory_pools_limit to 0. Set memory_pools to "off" instead. # # An overhead for maintaining memory pools is not taken into account # when the limit is checked. This overhead is close to four bytes per # object kept. However, pools may actually _save_ memory because of # reduced memory thrashing in your malloc library. # #Default: # memory_pools_limit 5 MB # TAG: forwarded_for on|off # If set, Squid will include your system's IP address or name # in the HTTP requests it forwards. By default it looks like # this: # # X-Forwarded-For: 192.1.2.3 # # If you disable this, it will appear as # # X-Forwarded-For: unknown # #Default: # forwarded_for on forwarded_for off # TAG: cachemgr_passwd # Specify passwords for cachemgr operations. # # Usage: cachemgr_passwd password action action ... # # Some valid actions are (see cache manager menu for a full list): # 5min # 60min # asndb # authenticator # cbdata # client_list # comm_incoming # config * # counters # delay # digest_stats # dns # events # filedescriptors # fqdncache # histograms # http_headers # info # io # ipcache # mem # menu # netdb # non_peers # objects # offline_toggle * # pconn # peer_select # reconfigure * # redirector # refresh # server_list # shutdown * # store_digest # storedir # utilization # via_headers # vm_objects # # * Indicates actions which will not be performed without a # valid password, others can be performed if not listed here. # # To disable an action, set the password to "disable". # To allow performing an action without a password, set the # password to "none". # # Use the keyword "all" to set the same password for all actions. # #Example: # cachemgr_passwd secret shutdown # cachemgr_passwd lesssssssecret info stats/objects # cachemgr_passwd disable all # #Default: # none # TAG: client_db on|off # If you want to disable collecting per-client statistics, # turn off client_db here. # #Default: # client_db on # TAG: reload_into_ims on|off # When you enable this option, client no-cache or ``reload'' # requests will be changed to If-Modified-Since requests. # Doing this VIOLATES the HTTP standard. Enabling this # feature could make you liable for problems which it # causes. # # see also refresh_pattern for a more selective approach. # #Default: # reload_into_ims off # TAG: maximum_single_addr_tries # This sets the maximum number of connection attempts for a # host that only has one address (for multiple-address hosts, # each address is tried once). # # The default value is one attempt, the (not recommended) # maximum is 255 tries. A warning message will be generated # if it is set to a value greater than ten. # # Note: This is in addition to the request re-forwarding which # takes place if Squid fails to get a satisfying response. # #Default: # maximum_single_addr_tries 1 # TAG: retry_on_error # If set to on Squid will automatically retry requests when # receiving an error response. This is mainly useful if you # are in a complex cache hierarchy to work around access # control errors. # #Default: # retry_on_error off # TAG: as_whois_server # WHOIS server to query for AS numbers. NOTE: AS numbers are # queried only when Squid starts up, not for every request. # #Default: # as_whois_server whois.ra.net # as_whois_server whois.ra.net # TAG: offline_mode # Enable this option and Squid will never try to validate cached # objects. # #Default: # offline_mode off # TAG: uri_whitespace # What to do with requests that have whitespace characters in the # URI. Options: # # strip: The whitespace characters are stripped out of the URL. # This is the behavior recommended by RFC2396. # deny: The request is denied. The user receives an "Invalid # Request" message. # allow: The request is allowed and the URI is not changed. The # whitespace characters remain in the URI. Note the # whitespace is passed to redirector processes if they # are in use. # encode: The request is allowed and the whitespace characters are # encoded according to RFC1738. This could be considered # a violation of the HTTP/1.1 # RFC because proxies are not allowed to rewrite URI's. # chop: The request is allowed and the URI is chopped at the # first whitespace. This might also be considered a # violation. # #Default: # uri_whitespace strip # TAG: coredump_dir # By default Squid leaves core files in the directory from where # it was started. If you set 'coredump_dir' to a directory # that exists, Squid will chdir() to that directory at startup # and coredump files will be left there. # #Default: # coredump_dir none # # Leave coredumps in the first cache dir coredump_dir /opt/local/var/squid/cache # TAG: chroot # Use this to have Squid do a chroot() while initializing. This # also causes Squid to fully drop root privileges after # initializing. This means, for example, if you use a HTTP # port less than 1024 and try to reconfigure, you will may get an # error saying that Squid can not open the port. # #Default: # none # TAG: balance_on_multiple_ip # Some load balancing servers based on round robin DNS have been # found not to preserve user session state across requests # to different IP addresses. # # By default Squid rotates IP's per request. By disabling # this directive only connection failure triggers rotation. # #Default: # balance_on_multiple_ip on # TAG: pipeline_prefetch # To boost the performance of pipelined requests to closer # match that of a non-proxied environment Squid can try to fetch # up to two requests in parallel from a pipeline. # # Defaults to off for bandwidth management and access logging # reasons. # #Default: # pipeline_prefetch off # TAG: high_response_time_warning (msec) # If the one-minute median response time exceeds this value, # Squid prints a WARNING with debug level 0 to get the # administrators attention. The value is in milliseconds. # #Default: # high_response_time_warning 0 # TAG: high_page_fault_warning # If the one-minute average page fault rate exceeds this # value, Squid prints a WARNING with debug level 0 to get # the administrators attention. The value is in page faults # per second. # #Default: # high_page_fault_warning 0 # TAG: high_memory_warning # If the memory usage (as determined by mallinfo) exceeds # this amount, Squid prints a WARNING with debug level 0 to get # the administrators attention. # #Default: # high_memory_warning 0 KB # TAG: sleep_after_fork (microseconds) # When this is set to a non-zero value, the main Squid process # sleeps the specified number of microseconds after a fork() # system call. This sleep may help the situation where your # system reports fork() failures due to lack of (virtual) # memory. Note, however, if you have a lot of child # processes, these sleep delays will add up and your # Squid will not service requests for some amount of time # until all the child processes have been started. # On Windows value less then 1000 (1 milliseconds) are # rounded to 1000. # #Default: # sleep_after_fork 0 # TAG: zero_buffers on|off # Squid by default will zero all buffers before using or reusing them. # Setting this to 'off' will result in fixed-sized temporary buffers # not being zero'ed. This may give a performance boost on certain # platforms but it may result in undefined behaviour at the present # time. # #Default: # zero_buffers on # TAG: windows_ipaddrchangemonitor on|off # On Windows Squid by default will monitor IP address changes and will # reconfigure itself after any detected event. This is very useful for # proxies connected to internet with dial-up interfaces. # In some cases (a Proxy server acting as VPN gateway is one) it could be # desiderable to disable this behaviour setting this to 'off'. # Note: after changing this, Squid service must be restarted. # #Default: # windows_ipaddrchangemonitor on ================================================ FILE: disable.sh ================================================ #!/bin/bash -x # macOS-Fortress: Firewall, Blackhole, and Privatizing Proxy # for Trackers, Attackers, Malware, Adware, and Spammers # disable.sh # commands SUDO=/usr/bin/sudo PORT=/opt/local/bin/port LAUNCHCTL=/bin/launchctl PFCTL=/sbin/pfctl KILLALL=/usr/bin/killall CAT=/bin/cat ECHO=/bin/echo $CAT </dev/null 2>&1 \ && echo "[✅] PAC $PROXY_PAC_DIRECTORY/proxy.pac.orig passes Javascript parsing" \ || echo "[❌] PAC $PROXY_PAC_DIRECTORY/proxy.pac.orig fails Javascript parsing" ; \ fi if [ -x $JSC -a -f $PROXY_PAC_DIRECTORY/proxy.pac ]; then \ $JSC $PROXY_PAC_DIRECTORY/proxy.pac >/dev/null 2>&1 \ && echo "[✅] PAC $PROXY_PAC_DIRECTORY/proxy.pac passes Javascript parsing" \ || echo "[❌] PAC $PROXY_PAC_DIRECTORY/proxy.pac fails Javascript parsing" ; \ fi # proxy.pac on proxy server if [[ `$CURL -s --head http://${PROXY_PAC_SERVER}/proxy.pac | $HEAD -n 1 | $GREP "HTTP/1.\d [23]\d\d"` ]]; then echo "[✅] Web server for http://${PROXY_PAC_SERVER}/proxy.pac is running properly" else $CAT < Label net.dshield.block Program /bin/bash ProgramArguments /bin/bash -c /bin/mkdir -p /usr/local/etc ; /opt/local/bin/wget -N -P /usr/local/etc http://feeds.dshield.org/block.txt && /opt/local/bin/wget -N -P /usr/local/etc http://feeds.dshield.org/block.txt.asc && /opt/local/bin/gpg --verify /usr/local/etc/block.txt.asc /usr/local/etc/block.txt && /usr/bin/perl -ane 'use POSIX; use Data::Validate::IP; my $vip=Data::Validate::IP->new; if (/^\w*#/) { print; } elsif ($vip->is_ipv4($F[0]) & $vip->is_ipv4($F[1]) & isdigit($F[2]) & (0<= $F[2] & $F[2]<=32)) { print $F[0], "/", $F[2], "\n"; }' /usr/local/etc/block.txt > /tmp/dshield_block_ip.txt && /usr/bin/install -m 644 -g admin -S /tmp/dshield_block_ip.txt /usr/local/etc/dshield_block_ip.txt ; /bin/rm -f /tmp/dshield_block_ip.txt ; /sbin/pfctl -a blockips -T load -f /usr/local/etc/blockips.conf RunAtLoad StartInterval 11250 StandardErrorPath /var/log/pf.log StandardOutPath /var/log/pf.log ================================================ FILE: net.emergingthreats.blockips.plist ================================================ Label net.emergingthreats.blockips Program /bin/bash ProgramArguments /bin/bash -c /bin/mkdir -p /usr/local/etc ; /opt/local/bin/wget -N -P /usr/local/etc http://rules.emergingthreats.net/fwrules/emerging-Block-IPs.txt ; /opt/local/bin/wget -N -P /usr/local/etc http://rules.emergingthreats.net/blockrules/compromised-ips.txt ; /sbin/pfctl -a blockips -T load -f /usr/local/etc/blockips.conf RunAtLoad StartInterval 47250 StandardErrorPath /var/log/pf.log StandardOutPath /var/log/pf.log ================================================ FILE: net.hphosts.hosts.plist ================================================ Label net.hphosts.hosts Program /bin/bash ProgramArguments /bin/bash -c /bin/mkdir -p /usr/local/etc ; ( /bin/test -f /etc/hosts.orig || /usr/bin/install -m 644 -S /etc/hosts /etc/hosts.orig ) && /bin/cp /etc/hosts.orig /tmp/hosts && /opt/local/bin/wget -N -P /usr/local/etc http://hosts-file.net/download/hosts.zip && /opt/local/bin/wget -N -P /usr/local/etc http://hosts-file.net/hphosts-partial.asp && /usr/bin/unzip -o /usr/local/etc/hosts.zip -d /tmp/hphosts && /opt/local/bin/gpg --verify /tmp/hphosts/hosts.txt.asc /tmp/hphosts/hosts.txt && ( /bin/test -f /usr/local/etc/whitelist.txt || /usr/bin/printf '\n# whitelisted hosts (FQDN and DN) will be deleted from hphost'"'"'s host.zip\n#\n' > /usr/local/etc/whitelist.txt ) && /usr/bin/printf '\n# hpHosts hosts.txt from http://hosts-file.net/download/hosts.zip:\n' > /tmp/hosts-block.txt && /bin/cat /tmp/hphosts/hosts.txt | tr -d '\015' | /usr/bin/perl -ane 'use POSIX; use Data::Validate::Domain qw(is_domain); { if (/^127\.0\.0\.1\s*(.+)$/) { print qq#127.0.0.1\t$1\n# if is_domain($1); } else { print; } }' >> /tmp/hosts-block.txt && /usr/bin/printf '\n# hpHosts hphosts-partial.asp from http://hosts-file.net/hphosts-partial.asp:\n' >> /tmp/hosts-block.txt && /bin/cat /usr/local/etc/hphosts-partial.asp | tr -d '\015' | /usr/bin/perl -ane 'use POSIX; use Data::Validate::Domain qw(is_domain); { if (/^127\.0\.0\.1\s*(.+)$/) { print qq#127.0.0.1\t$1\n# if is_domain($1); } else { print; } }' >> /tmp/hosts-block.txt && ( /bin/test -f /usr/local/etc/blacklist.txt && /bin/cat /usr/local/etc/blacklist.txt >> /tmp/hosts ) && /usr/bin/grep -v -E "`/usr/bin/perl -ane 'BEGIN{$s=qw#\\s+(#}; { if (!/^\w*#/&length($F[0])>0){$s = $s . $F[0] . qw(|);}} END{$s = substr($s,0,length($s)-1) . qw#)\\s*#; $s=~s/\\./\\\\./g; print $s;}' /usr/local/etc/whitelist.txt`" /tmp/hosts-block.txt >> /tmp/hosts && /usr/bin/install -m 644 -S /tmp/hosts /etc/hosts-hphosts ; /bin/rm -fr /tmp/hosts /tmp/hphosts /tmp/hosts-block.txt ; /opt/local/sbin/squid -k reconfigure RunAtLoad StartInterval 86850 StandardErrorPath /var/log/system.log StandardOutPath /var/log/system.log ================================================ FILE: net.openbsd.pf.brutexpire.plist ================================================ Label net.openbsd.pf.brutexpire Program /sbin/pfctl ProgramArguments /sbin/pfctl -t bruteforce -T expire 604800 RunAtLoad StartInterval 86400 StandardErrorPath /var/log/pf.log StandardOutPath /var/log/pf.log ================================================ FILE: net.openbsd.pf.plist ================================================ Disabled false Label net.openbsd.pf WorkingDirectory /var/run Program /bin/bash ProgramArguments /bin/bash -c for tt in {1..4}; do if [[ `/sbin/ifconfig | /opt/local/bin/pcregrep -M -o '^[^\t:]+:([^\n]|\n\t)*status: active' | /usr/bin/egrep -o -m 1 '^[^\t:]+'` = '' ]]; then /bin/sleep 45; else /sbin/pfctl -Fall && /sbin/pfctl -ef /etc/pf.conf; break; fi; done RunAtLoad StandardErrorPath /var/log/pf.log StandardOutPath /var/log/pf.log ================================================ FILE: org.opensource.flashcookiedelete.plist ================================================ Disabled Label org.opensource.flashcookiedelete.plist Program /bin/bash ProgramArguments /bin/bash -c /usr/bin/find ~/Library/Preferences/Macromedia/Flash\ Player ! -path ~/Library/Preferences/Macromedia/Flash\ Player/macromedia.com/support/flashplayer/sys/settings.sol -delete RunAtLoad ServiceDescription Delete Flash Cookies StartInterval 1800 ================================================ FILE: org.squid-cache.squid-rotate.plist ================================================ Label org.squid-cache.squid-rotate ProgramArguments /bin/bash -c /opt/local/sbin/squid -k rotate ; find /opt/local/var/squid/logs -mindepth 1 -mtime +30 -exec /bin/rm {} ';' StartCalendarInterval Hour 0 ================================================ FILE: pf.conf ================================================ # # Default PF configuration file. # # This file contains the main ruleset, which gets automatically loaded # at startup. PF will not be automatically enabled, however. Instead, # each component which utilizes PF is responsible for enabling and disabling # PF via -E and -X as documented in pfctl(8). That will ensure that PF # is disabled only when the last enable reference is released. # # Care must be taken to ensure that the main ruleset does not get flushed, # as the nested anchors rely on the anchor point defined here. In addition, # to the anchors loaded by this file, some system services would dynamically # insert anchors into the main ruleset. These anchors will be added only when # the system service is used and would removed on termination of the service. # # See pf.conf(5) for syntax. # # References for modifications: # The Book of PF by Peter N.M. Hansteen, p. 21 # http://ikawnoclast.com/security/mac-os-x-pf-firewall-avoiding-known-bad-guys/ # http://support.apple.com/kb/HT5519?viewlocale=en_US&locale=en_US # http://blog.scottlowe.org/2013/05/15/using-pf-on-os-x-mountain-lion/ # http://krypted.com/mac-security/a-cheat-sheet-for-using-pf-in-os-x-lion-and-up/ # Internal interface; use the command `ifconfig -a` or: # $ ifconfig | pcregrep -M -o '^[^\t:]+:([^\n]|\n\t)*status: active' | egrep -o -m 1 '^[^\t:]+' int_if = "en0" # VPN network (uncomment '#vpn#' comment lines) # $vpn_net == utun0/24 when Tunnelblick creates utun0 #vpn# vpn_net = "10.8.0/24" # utun0 interface doesn't exist at boot time # Options set block-policy return set fingerprints "/etc/pf.os" set ruleset-optimization basic set skip on lo0 # Normalization # Scrub incoming packets scrub in all no-df # # com.apple anchor point # scrub-anchor "com.apple/*" # Queueing # Translation # OpenVPN Server NAT # # The Book of PF, p. 21 # Allow VPN connections to the VPN host: # http://serverfault.com/questions/555594/troubleshoot-broken-tcp-from-openvpn-client-to-server-but-ping-traceroute-work #tun_if = "utun0" #no nat on ! $tun_if from $vpn_net to ($int_if) #nat on ! $tun_if from $vpn_net to ! ($int_if) -> ($int_if) # Use a list in case Tunnelblick creates multiples utun interaces #tun_if = "{ utun0, utun1, utun2, utun3, utun4, utun5, utun6, utun7, utun8, utun9 }" #vpn# not_tun_if = "{ !utun0, !utun1, !utun2, !utun3, !utun4, !utun5, !utun6, !utun7, !utun8, !utun9 }" #vpn# no nat on $not_tun_if from $vpn_net to ($int_if) #vpn# nat on $not_tun_if from $vpn_net to ! ($int_if) -> ($int_if) # This rule must be included below BEFORE these packets are passed by other rules: # pass in quick on $tun_if reply-to $tun_if from $vpn_net to $int_if nat-anchor "com.apple/*" rdr-anchor "com.apple/*" dummynet-anchor "com.apple/*" anchor "com.apple/*" load anchor "com.apple" from "/etc/pf.anchors/com.apple" # macOS Server Adaptive Firewall # Comment out for non-macOS Server instances # anchor "com.apple.server-firewall/*" # load anchor "com.apple.server-firewall" from "/etc/pf.anchors/com.apple.server-firewall" # Filtering # Block by default block all # Debugging: #pass quick log (all, to pflog0) all #block log (all, to pflog0) all # debugging rules # $ sudo ifconfig pflog0 create # $ sudo tcpdump -n -e -ttt -i pflog0 # $ sudo ifconfig pflog0 destroy # block log (all, to pflog0) all # Allow VPN connections to the VPN host: # http://serverfault.com/questions/555594/troubleshoot-broken-tcp-from-openvpn-client-to-server-but-ping-traceroute-work # pass in quick on $tun_if reply-to $tun_if from $vpn_net to $int_if # Rule for a lot of utun interfaces in case Tunnelblick creates extras #vpn# pass in quick on utun0 reply-to utun0 from $vpn_net to $int_if #vpn# pass in quick on utun1 reply-to utun1 from $vpn_net to $int_if #vpn# pass in quick on utun2 reply-to utun2 from $vpn_net to $int_if #vpn# pass in quick on utun3 reply-to utun3 from $vpn_net to $int_if #vpn# pass in quick on utun4 reply-to utun4 from $vpn_net to $int_if #vpn# pass in quick on utun5 reply-to utun5 from $vpn_net to $int_if #vpn# pass in quick on utun6 reply-to utun6 from $vpn_net to $int_if #vpn# pass in quick on utun7 reply-to utun7 from $vpn_net to $int_if #vpn# pass in quick on utun8 reply-to utun8 from $vpn_net to $int_if #vpn# pass in quick on utun9 reply-to utun9 from $vpn_net to $int_if # Local net table const { 10/8, 172.16/12, 192.168/16 } table const { ::1, fe80::/10 } pass quick inet from to any keep state pass quick inet6 from to any keep state # Antispoof antispoof log quick for $int_if inet # Block to/from illegal destinations or sources block drop in log quick from no-route to any block drop in log quick from urpf-failed to any # This is observed on macOS #block drop in log quick on $int_if from any to 255.255.255.255 # Whitelist # Hardcoded IPs #mydomainname_com = "xxx.xxx.xxx.xxx" #table const { $mydomainname_com } #pass in quick from #pass out quick to # Block brute force attacks table persist block drop log quick from # Allow application-specific traffic over these interfaces # multicast DNS pass on $int_if proto { udp, tcp } to { 224.0.0.2, 224.0.0.18, 224.0.0.251 } port mdns pass on $int_if proto igmp to { 224.0.0.1, 224.0.0.22, 224.0.0.251 } # quick pass of Tor relay ports to avoid blocks below #tor_relay = "{ 9001, 9030 }" #pass in quick proto tcp from any to $int_if port $tor_relay #pass out quick proto tcp from $int_if port $tor_relay to any # Open Source IP blocks # Refresh with pfctl -a blockips -T load -f /usr/local/etc/blockips.conf anchor 'blockips' label "Open Source IP Blocks" load anchor 'blockips' from '/usr/local/etc/blockips.conf' # ICMP icmp_types = "echoreq" pass inet proto icmp from $int_if:network to any icmp-type $icmp_types pass inet proto icmp from any to $int_if icmp-type $icmp_types # allow out the default range for traceroute(8): # "base+nhops*nqueries-1" (33434+64*3-1) pass out on $int_if inet proto udp from any to any port 33433 >< 33626 # Allow critical system traffic pass in quick inet proto udp from port bootps to port bootpc pass out quick inet proto udp from port bootpc to port bootps # LAN services: block access, except from localnet lan_udp_services = "{ domain, 5001, postgresql }" lan_tcp_services = "{ domain, auth, nntp, www, \ 311, 3128, 5001, 5900:5909, privoxy, postgresql, \ 8123, 8180, 8181, 9150, 9151 }" block in proto tcp from any to $int_if port $lan_tcp_services block in proto udp from any to $int_if port $lan_udp_services pass in inet proto udp from $int_if:network to $int_if port $lan_udp_services pass in inet proto tcp from $int_if:network to $int_if port $lan_tcp_services pass out proto udp from $int_if port $lan_udp_services to $int_if:network pass out proto tcp from $int_if port $lan_tcp_services to $int_if:network # Add vpn_net if running OpenVPN #vpn# pass in inet proto udp from $vpn_net to $int_if port $lan_udp_services #vpn# pass in inet proto tcp from $vpn_net to $int_if port $lan_tcp_services #vpn# pass out proto udp from $int_if port $lan_udp_services to $vpn_net #vpn# pass out proto tcp from $int_if port $lan_tcp_services to $vpn_net # Internet services internet_udp_services = "{ https, 500, openvpn, \ 1701, 4500, 5060, 5190, 5297, 5298, 5678, 16384 }" internet_tcp_services = "{ 995, 1640, 1723, 2195, \ 2196, 4190, 5218, 5223, 5190, 5220, 5222, 5298, \ 8008, 8443, 8800, 8843, 9001, 9030 }" pass in proto udp from any to $int_if port $internet_udp_services pass in proto tcp from any to $int_if port $internet_tcp_services pass out inet proto udp from $int_if to any port $internet_udp_services pass out inet proto tcp from $int_if to any port $internet_tcp_services #apns_services = "{ 2195, 2196 }" #pass in proto tcp from any port $apns_services to #pass out inet proto tcp to any port $apns_services from # ssh really restrictive pass in inet proto tcp from any to $int_if port ssh \ keep state (max-src-conn 5, max-src-conn-rate 5/2, \ overload flush global) pass out inet proto tcp from $int_if port ssh # web, mail more restrictive pass in inet proto tcp from any to $int_if \ port { smtp, https, imap, submission, imaps } \ keep state (max-src-nodes 50, max-src-conn 200, max-src-conn-rate 100/10, \ overload flush global) pass out inet proto tcp from $int_if to any \ port { smtp, imap4-ssl, imap, submission, imaps } # I2P #i2p_port = "65530" #pass in inet proto { udp, tcp } from any to $int_if port $i2p_port #pass out inet proto { udp, tcp } from $int_if port $i2p_port to any ================================================ FILE: pf_attacks ================================================ #!/bin/bash # Count attacks on the PF firewall num=0 res=$(sudo pfctl -t bruteforce -Ts 2>&1 | sed -e 1,2d | wc -l) num=$((num + res)) res=$(sudo pfctl -a blockips -t compromised_ips -Ts -v 2>&1 | sed -e 1,2d | egrep -e 'Packets: [^0]' | wc -l) num=$((num + res)) res=$(sudo pfctl -a blockips -t dshield_block_ip -Ts -v 2>&1 | sed -e 1,2d | egrep -e 'Packets: [^0]' | wc -l) num=$((num + res)) res=$(sudo pfctl -a blockips -t emerging_threats -Ts -v 2>&1 | sed -e 1,2d | egrep -e 'Packets: [^0]' | wc -l) num=$((num + res)) echo $num ================================================ FILE: pf_restart ================================================ #!/bin/bash -x # restart pf sudo launchctl unload -w /Library/LaunchDaemons/net.openbsd.pf.plist sudo launchctl load -w /Library/LaunchDaemons/net.openbsd.pf.plist ================================================ FILE: privoxy_restart ================================================ #!/bin/bash -x # restart Privoxy sudo launchctl unload -w /Library/LaunchDaemons/org.macports.Privoxy.plist sudo launchctl load -w /Library/LaunchDaemons/org.macports.Privoxy.plist ================================================ FILE: proxy.pac ================================================ function FindProxyForURL(url, host) { if ( // Bypass proxy on the LAN for local DNS domainname // (host == "mydomainname.com") || // dnsDomainIs(host, ".mydomainname.com") || // (host == "mydomainname.private") || // dnsDomainIs(host, ".mydomainname.private") || // isPlainHostName(host) || shExpMatch(host, "10.*") || shExpMatch(host, "172.16.*") || shExpMatch(host, "192.168.*") || shExpMatch(host, "127.*") || dnsDomainIs(host, ".LOCAL") || // (dnsDomainIs(host, ".local") && // !dnsDomainIs(host, ".mydomainname.com")) || (url.substring(0,3) == "ftp") || // TV Guide listings on EyeTV; TitanTV Remote Scheduling (host == "epg.eyetv.com") || (host == "xmlrpc.macrovision.com") || (host == "partners.titantv.com") || dnsDomainIs(host, ".apple.com") || (url.substring(0,5) != "http:") ) return "DIRECT"; else // Use the listen address for squid // return "PROXY mydomainname.com:3128"; return "PROXY 127.0.0.1:3128"; } ================================================ FILE: readme-and-install.sh ================================================ #!/bin/bash -x # macOS Fortress: Firewall, Blackhole, and Privatizing Proxy # for Trackers, Attackers, Malware, Adware, and Spammers # with On-Demand and On-Access Anti-Virus Scanning # commands SUDO=/usr/bin/sudo INSTALL=/usr/bin/install PORT=/opt/local/bin/port CPAN=/usr/bin/cpan GPG=/opt/local/bin/gpg CURL=/usr/bin/curl OPEN=/usr/bin/open DIFF=/usr/bin/diff PATCH=/usr/bin/patch LAUNCHCTL=/bin/launchctl APACHECTL=/usr/sbin/apachectl SERVERADMIN=/Applications/Server.app/Contents/ServerRoot/usr/sbin/serveradmin PFCTL=/sbin/pfctl MKDIR=/bin/mkdir CHOWN=/usr/sbin/chown CAT=/bin/cat ECHO=/bin/echo MORE=/usr/bin/more LSOF=/usr/sbin/lsof CP=/bin/cp RM=/bin/rm SH=/bin/sh FMT=/usr/bin/fmt EGREP=/usr/bin/egrep RSYNC=/usr/bin/rsync STACK=/usr/local/bin/stack ADBLOCK2PRIVOXY=/usr/local/bin/adblock2privoxy $CAT <<'HELPSTRING' | $MORE macOS Fortress: Firewall, Blackhole, and Privatizing Proxy for Trackers, Attackers, Malware, Adware, and Spammers Kernel-level, OS-level, and client-level security for macOS. Built to address a steady stream of attacks visible on snort and server logs, as well as blocks ads, malicious scripts, and conceal information used to track you around the web. After this package was installed, snort and other detections have fallen to a fraction with a few simple blocking actions. This setup is a lot more capable and effective than using a simple adblocking browser Add-On. There's a world of difference between ad-filled web pages with and without a filtering proxy server. It's also saved me from inadvertantly clicking on phishing links. This package uses these features: * macOS adaptive firewall * Adaptive firewall to brute force attacks * IP blocks updated about twice a day from emergingthreats.net (IP blocks, compromised hosts, Malvertisers) and dshield.org’s top-20 * Host blocks updated about twice a day from hphosts.net * Special proxy.pac host blacklisting from hostsfile.org * On-Demand and On-Access Anti-Virus This install script installs and configures a macOS Firewall and Privatizing Proxy, and macOS On-Demand and On-Access Anti-Virus. It will: * Download and install several key utilities and applications (wget gnupg2 p7zip squid privoxy nmap) * Configure macOS's PF native firewall (man pfctl, man pf.conf), squid, and privoxy * Turn on macOS's native Apache webserver to serve the Automatic proxy configuration http://localhost/proxy.pac * Networking on the local computer can be set up to use this Automatic Proxy Configuration without breaking App Store or other updates (see squid.conf) * Uncomment the nat directive in pf.conf if you wish to set up an OpenVPN server * Install and launch daemons that download and regularly update open source IP and host blacklists. The sources are emergingthreats.net (net.emergingthreats.blockips.plist), dshield.org (net.dshield.block.plist), hosts-file.net (net.hphosts.hosts.plist), and EasyList (com.github.essandess.easylist-pac.plist) * On-Demand and On-Access Anti-Virus using clamAV; both scheduled full volume scans and on-access scans of all user Downloads and Desktop directories are performed * After installation the connection between clients and the internet looks this this: Application <--port 3128--> Squid <--port 8118--> Privoxy <----> Internet Installation: sudo port install macos-fortress Notes: * Configure the squid proxy to accept connections on the LAN IP and set LAN device Automatic Proxy Configurations to http://lan_ip/proxy.pac to protect devices on the LAN. * Count the number of attacks since boot with the script pf_attacks. ``Attack'' is defined as the number of blocked IPs in PF's bruteforce table plus the number of denied connections from blacklisted IPs in the tables compromised_ips, dshield_block_ip, and emerging_threats. * Both squid and Privoxy are configured to forge the User-Agent. The default is an iPad to allow mobile device access. Change this to your local needs if necessary. * Whitelist or blacklist specific domain names with the files /usr/local/etc/whitelist.txt and /usr/local/etc/blacklist.txt. After editing these file, use launchctl to unload and load the plist /Library/LaunchDaemons/net.hphosts.hosts.plist, which recreates the hostfile /etc/hosts-hphost and reconfigures the squid proxy to use the updates. * Sometimes pf and privoxy do not launch at boot, in spite of the use of the use of their launch daemons. Fix this by hand after boot with the scripts macosfortress_setup_check.sh, or individually using pf_restart, privoxy_restart, and squid_restart. And please post a solution if you find one. * All open source updates are done using the 'wget -N' option to save everyone's bandwidth Security: * These services are intended to be run on a secure LAN behind a router firewall. * Even though the default proxy configuration will only accept connections made from the local computer (localhost), do not configure the router to forward ports 3128 or 8118 in case you ever change this or you will be running an open web proxy. HELPSTRING $CAT < /tmp/squid.conf.patch $SUDO -E $PATCH -p5 /opt/local/etc/squid/squid.conf < /tmp/squid.conf.patch $RM /tmp/squid.conf.patch # rotate squid logs if ! [ -f /Library/LaunchDaemons/org.squid-cache.squid-rotate.plist ] then $SUDO -E $INSTALL -m 644 ./org.squid-cache.squid-rotate.plist /Library/LaunchDaemons fi if ! [ -d /opt/local/var/squid/logs ]; then $SUDO -E $MKDIR -p -m 644 /opt/local/var/squid/logs $SUDO -E $CHOWN -R squid:squid /opt/local/var/squid fi $SUDO -E /opt/local/sbin/squid -s -z --foreground # privoxy #config $SUDO -E $INSTALL -m 640 -o privoxy -g privoxy -B .orig /opt/local/etc/privoxy/config /opt/local/etc/privoxy/config.orig $DIFF -NaurdwB -I '^ *#.*' /opt/local/etc/privoxy/config ./config > /tmp/config.patch $SUDO -E $PATCH -p5 /opt/local/etc/privoxy/config < /tmp/config.patch $SUDO -E $CHOWN privoxy:privoxy /opt/local/etc/privoxy/config $RM /tmp/config.patch #match-all.action $SUDO -E $INSTALL -m 640 -o privoxy -g privoxy -B .orig /opt/local/etc/privoxy/match-all.action /opt/local/etc/privoxy/match-all.action.orig $DIFF -NaurdwB -I '^ *#.*' /opt/local/etc/privoxy/match-all.action ./match-all.action > /tmp/match-all.action.patch $SUDO -E $PATCH -p5 /opt/local/etc/privoxy/match-all.action < /tmp/match-all.action.patch $SUDO -E $CHOWN privoxy:privoxy /opt/local/etc/privoxy/match-all.action $RM /tmp/match-all.action.patch #user.action $SUDO -E $INSTALL -m 644 -o privoxy -g privoxy -B .orig /opt/local/etc/privoxy/user.action /opt/local/etc/privoxy/user.action.orig $DIFF -NaurdwB -I '^ *#.*' /opt/local/etc/privoxy/user.action ./user.action > /tmp/user.action.patch $SUDO -E $PATCH -p5 /opt/local/etc/privoxy/user.action < /tmp/user.action.patch $SUDO -E $CHOWN privoxy:privoxy /opt/local/etc/privoxy/user.action $RM /tmp/user.action.patch $SUDO -E $BASH -c '( cd /opt/local/etc/privoxy ; /usr/sbin/chown privoxy:privoxy config* *.action *.filter )' #privoxy logs if ! [ -d /opt/local/var/log/privoxy ]; then $SUDO -E $MKDIR -m 644 /opt/local/var/log/privoxy $SUDO -E $CHOWN privoxy:privoxy /opt/local/var/log/privoxy fi # install the files $SUDO -E $CP /etc/hosts /etc/hosts.orig $SUDO -E $INSTALL -b -B .orig ./pf.conf /etc if ! [ -f /Library/LaunchDaemons/net.openbsd.pf.plist ] then $SUDO -E $INSTALL -m 644 ./net.openbsd.pf.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/net.openbsd.pf.brutexpire.plist ] then $SUDO -E $INSTALL -m 644 ./net.openbsd.pf.brutexpire.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/net.emergingthreats.blockips.plist ] then $SUDO -E $INSTALL -m 644 ./net.emergingthreats.blockips.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/net.dshield.block.plist ] then $SUDO -E $INSTALL -m 644 ./net.dshield.block.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/net.hphosts.hosts.plist ] then $SUDO -E $INSTALL -m 644 ./net.hphosts.hosts.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/com.github.essandess.easylist-pac.plist ] then $SUDO -E $INSTALL -m 644 ./com.github.essandess.easylist-pac.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/com.github.essandess.adblock2privoxy.plist ] then $SUDO -E $INSTALL -m 644 ./easylist-pac-privoxy/adblock2privoxy/com.github.essandess.adblock2privoxy.plist /Library/LaunchDaemons fi if ! [ -f /Library/LaunchDaemons/com.github.essandess.adblock2privoxy.nginx.plist ] then $SUDO -E $INSTALL -m 644 ./easylist-pac-privoxy/adblock2privoxy/com.github.essandess.adblock2privoxy.nginx.plist /Library/LaunchDaemons fi $INSTALL -m 644 ./org.opensource.flashcookiedelete.plist ~/Library/LaunchAgents $SUDO -E $MKDIR -p /usr/local/etc $SUDO -E $INSTALL -m 644 ./blockips.conf /usr/local/etc $SUDO -E $INSTALL -m 644 ./whitelist.txt /usr/local/etc $SUDO -E $INSTALL -m 644 ./blacklist.txt /usr/local/etc $SUDO -E $INSTALL -m 755 ./pf_attacks /usr/local/bin $SUDO -E $INSTALL -m 755 ./macosfortress_setup_check.sh /usr/local/bin $SUDO -E $INSTALL -m 755 ./pf_restart /usr/local/bin $SUDO -E $INSTALL -m 755 ./squid_restart /usr/local/bin $SUDO -E $INSTALL -m 755 ./privoxy_restart /usr/local/bin $SUDO -E $INSTALL -m 755 ./easylist-pac-privoxy/easylist_pac.py /usr/local/bin # launchd daemons $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/net.openbsd.pf.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/net.openbsd.pf.brutexpire.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/net.emergingthreats.blockips.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/net.dshield.block.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/net.hphosts.hosts.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/com.github.essandess.easylist-pac.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/com.github.essandess.adblock2privoxy.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/com.github.essandess.adblock2privoxy.nginx.plist $SUDO -E $LAUNCHCTL load -w /Library/LaunchDaemons/org.squid-cache.squid-rotate.plist # start these services for the 1st time because they use RunAtLoad false $SUDO -E $LAUNCHCTL start net.emergingthreats.blockips $SUDO -E $LAUNCHCTL start net.dshield.block $SUDO -E $LAUNCHCTL start net.hphosts.hosts $SUDO -E $LAUNCHCTL start com.github.essandess.easylist-pac $SUDO -E $LAUNCHCTL start com.github.essandess.adblock2privoxy $LAUNCHCTL load ~/Library/LaunchAgents/org.opensource.flashcookiedelete.plist $SUDO -E $PORT load squid4 $SUDO -E $PORT load privoxy # Turn on macOS Server's adaptive firewall: if [ -d /Applications/Server.app ] then $SUDO -E /Applications/Server.app/Contents/ServerRoot/usr/sbin/serverctl enable service=com.apple.afctl $SUDO -E /Applications/Server.app/Contents/ServerRoot/usr/libexec/afctl -f fi # check after boot /usr/local/bin/macosfortress_setup_check.sh $CAT <<'URL_PATH_INCLUSION' To allow URL path blocking capability in HTTPS: * Chrome: $ defaults write com.google.Chrome PacHttpsUrlStrippingEnabled -bool false * Firefox, about:config: network.proxy.autoconfig_url.include_path : true URL_PATH_INCLUSION exit 0 ================================================ FILE: squid.conf ================================================ # WELCOME TO SQUID 4.7 # ---------------------------- # # This is the documentation for the Squid configuration file. # This documentation can also be found online at: # http://www.squid-cache.org/Doc/config/ # # You may wish to look at the Squid home page and wiki for the # FAQ and other documentation: # http://www.squid-cache.org/ # http://wiki.squid-cache.org/SquidFaq # http://wiki.squid-cache.org/ConfigExamples # # This documentation shows what the defaults for various directives # happen to be. If you don't need to change the default, you should # leave the line out of your squid.conf in most cases. # # In some cases "none" refers to no default setting at all, # while in other cases it refers to the value of the option # - the comments for that keyword indicate if this is the case. # # Configuration options can be included using the "include" directive. # Include takes a list of files to include. Quoting and wildcards are # supported. # # For example, # # include /path/to/included/file/squid.acl.config # # Includes can be nested up to a hard-coded depth of 16 levels. # This arbitrary restriction is to prevent recursive include references # from causing Squid entering an infinite loop whilst trying to load # configuration files. # # Values with byte units # # Squid accepts size units on some size related directives. All # such directives are documented with a default value displaying # a unit. # # Units accepted by Squid are: # bytes - byte # KB - Kilobyte (1024 bytes) # MB - Megabyte # GB - Gigabyte # # Values with spaces, quotes, and other special characters # # Squid supports directive parameters with spaces, quotes, and other # special characters. Surround such parameters with "double quotes". Use # the configuration_includes_quoted_values directive to enable or # disable that support. # # Squid supports reading configuration option parameters from external # files using the syntax: # parameters("/path/filename") # For example: # acl whitelist dstdomain parameters("/etc/squid/whitelist.txt") # # Conditional configuration # # If-statements can be used to make configuration directives # depend on conditions: # # if # ... regular configuration directives ... # [else # ... regular configuration directives ...] # endif # # The else part is optional. The keywords "if", "else", and "endif" # must be typed on their own lines, as if they were regular # configuration directives. # # NOTE: An else-if condition is not supported. # # These individual conditions types are supported: # # true # Always evaluates to true. # false # Always evaluates to false. # = # Equality comparison of two integer numbers. # # # SMP-Related Macros # # The following SMP-related preprocessor macros can be used. # # ${process_name} expands to the current Squid process "name" # (e.g., squid1, squid2, or cache1). # # ${process_number} expands to the current Squid process # identifier, which is an integer number (e.g., 1, 2, 3) unique # across all Squid processes of the current service instance. # # ${service_name} expands into the current Squid service instance # name identifier which is provided by -n on the command line. # # Logformat Macros # # Logformat macros can be used in many places outside of the logformat # directive. In theory, all of the logformat codes can be used as %macros, # where they are supported. In practice, a %macro expands as a dash (-) when # the transaction does not yet have enough information and a value is needed. # # There is no definitive list of what tokens are available at the various # stages of the transaction. # # And some information may already be available to Squid but not yet # committed where the macro expansion code can access it (report # such instances!). The macro will be expanded into a single dash # ('-') in such cases. Not all macros have been tested. # # TAG: broken_vary_encoding # This option is not yet supported by Squid-3. #Default: # none # TAG: cache_vary # This option is not yet supported by Squid-3. #Default: # none # TAG: error_map # This option is not yet supported by Squid-3. #Default: # none # TAG: external_refresh_check # This option is not yet supported by Squid-3. #Default: # none # TAG: location_rewrite_program # This option is not yet supported by Squid-3. #Default: # none # TAG: refresh_stale_hit # This option is not yet supported by Squid-3. #Default: # none # TAG: cache_peer_domain # Replace with dstdomain ACLs and cache_peer_access. #Default: # none # TAG: ie_refresh # Remove this line. The behaviour enabled by this is no longer needed. #Default: # none # TAG: sslproxy_cafile # Remove this line. Use tls_outgoing_options cafile= instead. #Default: # none # TAG: sslproxy_capath # Remove this line. Use tls_outgoing_options capath= instead. #Default: # none # TAG: sslproxy_cipher # Remove this line. Use tls_outgoing_options cipher= instead. #Default: # none # TAG: sslproxy_client_certificate # Remove this line. Use tls_outgoing_options cert= instead. #Default: # none # TAG: sslproxy_client_key # Remove this line. Use tls_outgoing_options key= instead. #Default: # none # TAG: sslproxy_flags # Remove this line. Use tls_outgoing_options flags= instead. #Default: # none # TAG: sslproxy_options # Remove this line. Use tls_outgoing_options options= instead. #Default: # none # TAG: sslproxy_version # Remove this line. Use tls_outgoing_options options= instead. #Default: # none # TAG: hierarchy_stoplist # Remove this line. Use always_direct or cache_peer_access ACLs instead if you need to prevent cache_peer use. #Default: # none # TAG: log_access # Remove this line. Use acls with access_log directives to control access logging #Default: # none # TAG: log_icap # Remove this line. Use acls with icap_log directives to control icap logging #Default: # none # TAG: ignore_ims_on_miss # Remove this line. The HTTP/1.1 feature is now configured by 'cache_miss_revalidate'. #Default: # none # TAG: balance_on_multiple_ip # Remove this line. Squid performs a 'Happy Eyeballs' algorithm, this multiple-IP algorithm is not longer relevant. #Default: # none # TAG: chunked_request_body_max_size # Remove this line. Squid is now HTTP/1.1 compliant. #Default: # none # TAG: dns_v4_fallback # Remove this line. Squid performs a 'Happy Eyeballs' algorithm, the 'fallback' algorithm is no longer relevant. #Default: # none # TAG: emulate_httpd_log # Replace this with an access_log directive using the format 'common' or 'combined'. #Default: # none # TAG: forward_log # Use a regular access.log with ACL limiting it to MISS events. #Default: # none # TAG: ftp_list_width # Remove this line. Configure FTP page display using the CSS controls in errorpages.css instead. #Default: # none # TAG: ignore_expect_100 # Remove this line. The HTTP/1.1 feature is now fully supported by default. #Default: # none # TAG: log_fqdn # Remove this option from your config. To log FQDN use %>A in the log format. #Default: # none # TAG: log_ip_on_direct # Remove this option from your config. To log server or peer names use % ##auth_param negotiate children 20 startup=0 idle=1 ##auth_param negotiate keep_alive on ## ##auth_param digest program ##auth_param digest children 20 startup=0 idle=1 ##auth_param digest realm Squid proxy-caching web server ##auth_param digest nonce_garbage_interval 5 minutes ##auth_param digest nonce_max_duration 30 minutes ##auth_param digest nonce_max_count 50 ## ##auth_param ntlm program ##auth_param ntlm children 20 startup=0 idle=1 ##auth_param ntlm keep_alive on ## ##auth_param basic program ##auth_param basic children 5 startup=5 idle=1 ##auth_param basic realm Squid proxy-caching web server ##auth_param basic credentialsttl 2 hours #Default: # none # TAG: authenticate_cache_garbage_interval # The time period between garbage collection across the username cache. # This is a trade-off between memory utilization (long intervals - say # 2 days) and CPU (short intervals - say 1 minute). Only change if you # have good reason to. #Default: # authenticate_cache_garbage_interval 1 hour # TAG: authenticate_ttl # The time a user & their credentials stay in the logged in # user cache since their last request. When the garbage # interval passes, all user credentials that have passed their # TTL are removed from memory. #Default: # authenticate_ttl 1 hour # TAG: authenticate_ip_ttl # If you use proxy authentication and the 'max_user_ip' ACL, # this directive controls how long Squid remembers the IP # addresses associated with each user. Use a small value # (e.g., 60 seconds) if your users might change addresses # quickly, as is the case with dialup. You might be safe # using a larger value (e.g., 2 hours) in a corporate LAN # environment with relatively static address assignments. #Default: # authenticate_ip_ttl 1 second # ACCESS CONTROLS # ----------------------------------------------------------------------------- # TAG: external_acl_type # This option defines external acl classes using a helper program # to look up the status # # external_acl_type name [options] FORMAT /path/to/helper [helper arguments] # # Options: # # ttl=n TTL in seconds for cached results (defaults to 3600 # for 1 hour) # # negative_ttl=n # TTL for cached negative lookups (default same # as ttl) # # grace=n Percentage remaining of TTL where a refresh of a # cached entry should be initiated without needing to # wait for a new reply. (default is for no grace period) # # cache=n The maximum number of entries in the result cache. The # default limit is 262144 entries. Each cache entry usually # consumes at least 256 bytes. Squid currently does not remove # expired cache entries until the limit is reached, so a proxy # will sooner or later reach the limit. The expanded FORMAT # value is used as the cache key, so if the details in FORMAT # are highly variable, a larger cache may be needed to produce # reduction in helper load. # # children-max=n # Maximum number of acl helper processes spawned to service # external acl lookups of this type. (default 5) # # children-startup=n # Minimum number of acl helper processes to spawn during # startup and reconfigure to service external acl lookups # of this type. (default 0) # # children-idle=n # Number of acl helper processes to keep ahead of traffic # loads. Squid will spawn this many at once whenever load # rises above the capabilities of existing processes. # Up to the value of children-max. (default 1) # # concurrency=n concurrency level per process. Only used with helpers # capable of processing more than one query at a time. # # queue-size=N The queue-size option sets the maximum number of # queued requests. A request is queued when no existing # helper can accept it due to concurrency limit and no # new helper can be started due to children-max limit. # If the queued requests exceed queue size, the acl is # ignored. The default value is set to 2*children-max. # # protocol=2.5 Compatibility mode for Squid-2.5 external acl helpers. # # ipv4 / ipv6 IP protocol used to communicate with this helper. # The default is to auto-detect IPv6 and use it when available. # # # FORMAT is a series of %macro codes. See logformat directive for a full list # of the accepted codes. Although note that at the time of any external ACL # being tested data may not be available and thus some %macro expand to '-'. # # In addition to the logformat codes; when processing external ACLs these # additional macros are made available: # # %ACL The name of the ACL being tested. # # %DATA The ACL arguments specified in the referencing config # 'acl ... external' line, separated by spaces (an # "argument string"). see acl external. # # If there are no ACL arguments %DATA expands to '-'. # # If you do not specify a DATA macro inside FORMAT, # Squid automatically appends %DATA to your FORMAT. # Note that Squid-3.x may expand %DATA to whitespace # or nothing in this case. # # By default, Squid applies URL-encoding to each ACL # argument inside the argument string. If an explicit # encoding modifier is used (e.g., %#DATA), then Squid # encodes the whole argument string as a single token # (e.g., with %#DATA, spaces between arguments become # %20). # # If SSL is enabled, the following formating codes become available: # # %USER_CERT SSL User certificate in PEM format # %USER_CERTCHAIN SSL User certificate chain in PEM format # %USER_CERT_xx SSL User certificate subject attribute xx # %USER_CA_CERT_xx SSL User certificate issuer attribute xx # # # NOTE: all other format codes accepted by older Squid versions # are deprecated. # # # General request syntax: # # [channel-ID] FORMAT-values # # # FORMAT-values consists of transaction details expanded with # whitespace separation per the config file FORMAT specification # using the FORMAT macros listed above. # # Request values sent to the helper are URL escaped to protect # each value in requests against whitespaces. # # If using protocol=2.5 then the request sent to the helper is not # URL escaped to protect against whitespace. # # NOTE: protocol=3.0 is deprecated as no longer necessary. # # When using the concurrency= option the protocol is changed by # introducing a query channel tag in front of the request/response. # The query channel tag is a number between 0 and concurrency-1. # This value must be echoed back unchanged to Squid as the first part # of the response relating to its request. # # # The helper receives lines expanded per the above format specification # and for each input line returns 1 line starting with OK/ERR/BH result # code and optionally followed by additional keywords with more details. # # # General result syntax: # # [channel-ID] result keyword=value ... # # Result consists of one of the codes: # # OK # the ACL test produced a match. # # ERR # the ACL test does not produce a match. # # BH # An internal error occurred in the helper, preventing # a result being identified. # # The meaning of 'a match' is determined by your squid.conf # access control configuration. See the Squid wiki for details. # # Defined keywords: # # user= The users name (login) # # password= The users password (for login= cache_peer option) # # message= Message describing the reason for this response. # Available as %o in error pages. # Useful on (ERR and BH results). # # tag= Apply a tag to a request. Only sets a tag once, # does not alter existing tags. # # log= String to be logged in access.log. Available as # %ea in logformat specifications. # # clt_conn_tag= Associates a TAG with the client TCP connection. # Please see url_rewrite_program related documentation # for this kv-pair. # # Any keywords may be sent on any response whether OK, ERR or BH. # # All response keyword values need to be a single token with URL # escaping, or enclosed in double quotes (") and escaped using \ on # any double quotes or \ characters within the value. The wrapping # double quotes are removed before the value is interpreted by Squid. # \r and \n are also replace by CR and LF. # # Some example key values: # # user=John%20Smith # user="John Smith" # user="J. \"Bob\" Smith" #Default: # none # TAG: acl # Defining an Access List # # Every access list definition must begin with an aclname and acltype, # followed by either type-specific arguments or a quoted filename that # they are read from. # # acl aclname acltype argument ... # acl aclname acltype "file" ... # # When using "file", the file should contain one item per line. # # # ACL Options # # Some acl types supports options which changes their default behaviour: # # -i,+i By default, regular expressions are CASE-SENSITIVE. To make them # case-insensitive, use the -i option. To return case-sensitive # use the +i option between patterns, or make a new ACL line # without -i. # # -n Disable lookups and address type conversions. If lookup or # conversion is required because the parameter type (IP or # domain name) does not match the message address type (domain # name or IP), then the ACL would immediately declare a mismatch # without any warnings or lookups. # # -m[=delimiters] # Perform a list membership test, interpreting values as # comma-separated token lists and matching against individual # tokens instead of whole values. # The optional "delimiters" parameter specifies one or more # alternative non-alphanumeric delimiter characters. # non-alphanumeric delimiter characters. # # -- Used to stop processing all options, in the case the first acl # value has '-' character as first character (for example the '-' # is a valid domain name) # # Some acl types require suspending the current request in order # to access some external data source. # Those which do are marked with the tag [slow], those which # don't are marked as [fast]. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl # for further information # # ***** ACL TYPES AVAILABLE ***** # # acl aclname src ip-address/mask ... # clients IP address [fast] # acl aclname src addr1-addr2/mask ... # range of addresses [fast] # acl aclname dst [-n] ip-address/mask ... # URL host's IP address [slow] # acl aclname localip ip-address/mask ... # IP address the client connected to [fast] # #if USE_SQUID_EUI # acl aclname arp mac-address ... # acl aclname eui64 eui64-address ... # # [fast] # # MAC (EUI-48) and EUI-64 addresses use xx:xx:xx:xx:xx:xx notation. # # # # The 'arp' ACL code is not portable to all operating systems. # # It works on Linux, Solaris, Windows, FreeBSD, and some other # # BSD variants. # # # # The eui_lookup directive is required to be 'on' (the default) # # and Squid built with --enable-eui for MAC/EUI addresses to be # # available for this ACL. # # # # Squid can only determine the MAC/EUI address for IPv4 # # clients that are on the same subnet. If the client is on a # # different subnet, then Squid cannot find out its address. # # # # IPv6 protocol does not contain ARP. MAC/EUI is either # # encoded directly in the IPv6 address or not available. #endif # acl aclname clientside_mark mark[/mask] ... # # matches CONNMARK of an accepted connection [fast] # # # # mark and mask are unsigned integers (hex, octal, or decimal). # # If multiple marks are given, then the ACL matches if at least # # one mark matches. # # # # Uses netfilter-conntrack library. # # Requires building Squid with --enable-linux-netfilter. # # # # The client, various intermediaries, and Squid itself may set # # CONNMARK at various times. The last CONNMARK set wins. This ACL # # checks the mark present on an accepted connection or set by # # Squid afterwards, depending on the ACL check timing. This ACL # # effectively ignores any mark set by other agents after Squid has # # accepted the connection. # # acl aclname srcdomain .foo.com ... # # reverse lookup, from client IP [slow] # acl aclname dstdomain [-n] .foo.com ... # # Destination server from URL [fast] # acl aclname srcdom_regex [-i] \.foo\.com ... # # regex matching client name [slow] # acl aclname dstdom_regex [-n] [-i] \.foo\.com ... # # regex matching server [fast] # # # # For dstdomain and dstdom_regex a reverse lookup is tried if a IP # # based URL is used and no match is found. The name "none" is used # # if the reverse lookup fails. # # acl aclname src_as number ... # acl aclname dst_as number ... # # [fast] # # Except for access control, AS numbers can be used for # # routing of requests to specific caches. Here's an # # example for routing all requests for AS#1241 and only # # those to mycache.mydomain.net: # # acl asexample dst_as 1241 # # cache_peer_access mycache.mydomain.net allow asexample # # cache_peer_access mycache_mydomain.net deny all # # acl aclname peername myPeer ... # acl aclname peername_regex [-i] regex-pattern ... # # [fast] # # match against a named cache_peer entry # # set unique name= on cache_peer lines for reliable use. # # acl aclname time [day-abbrevs] [h1:m1-h2:m2] # # [fast] # # day-abbrevs: # # S - Sunday # # M - Monday # # T - Tuesday # # W - Wednesday # # H - Thursday # # F - Friday # # A - Saturday # # h1:m1 must be less than h2:m2 # # acl aclname url_regex [-i] ^http:// ... # # regex matching on whole URL [fast] # acl aclname urllogin [-i] [^a-zA-Z0-9] ... # # regex matching on URL login field # acl aclname urlpath_regex [-i] \.gif$ ... # # regex matching on URL path [fast] # # acl aclname port 80 70 21 0-1024... # destination TCP port [fast] # # ranges are alloed # acl aclname localport 3128 ... # TCP port the client connected to [fast] # # NP: for interception mode this is usually '80' # # acl aclname myportname 3128 ... # *_port name [fast] # # acl aclname proto HTTP FTP ... # request protocol [fast] # # acl aclname method GET POST ... # HTTP request method [fast] # # acl aclname http_status 200 301 500- 400-403 ... # # status code in reply [fast] # # acl aclname browser [-i] regexp ... # # pattern match on User-Agent header (see also req_header below) [fast] # # acl aclname referer_regex [-i] regexp ... # # pattern match on Referer header [fast] # # Referer is highly unreliable, so use with care # # acl aclname ident [-i] username ... # acl aclname ident_regex [-i] pattern ... # # string match on ident output [slow] # # use REQUIRED to accept any non-null ident. # # acl aclname proxy_auth [-i] username ... # acl aclname proxy_auth_regex [-i] pattern ... # # perform http authentication challenge to the client and match against # # supplied credentials [slow] # # # # takes a list of allowed usernames. # # use REQUIRED to accept any valid username. # # # # Will use proxy authentication in forward-proxy scenarios, and plain # # http authenticaiton in reverse-proxy scenarios # # # # NOTE: when a Proxy-Authentication header is sent but it is not # # needed during ACL checking the username is NOT logged # # in access.log. # # # # NOTE: proxy_auth requires a EXTERNAL authentication program # # to check username/password combinations (see # # auth_param directive). # # # # NOTE: proxy_auth can't be used in a transparent/intercepting proxy # # as the browser needs to be configured for using a proxy in order # # to respond to proxy authentication. # # acl aclname snmp_community string ... # # A community string to limit access to your SNMP Agent [fast] # # Example: # # # # acl snmppublic snmp_community public # # acl aclname maxconn number # # This will be matched when the client's IP address has # # more than TCP connections established. [fast] # # NOTE: This only measures direct TCP links so X-Forwarded-For # # indirect clients are not counted. # # acl aclname max_user_ip [-s] number # # This will be matched when the user attempts to log in from more # # than different ip addresses. The authenticate_ip_ttl # # parameter controls the timeout on the ip entries. [fast] # # If -s is specified the limit is strict, denying browsing # # from any further IP addresses until the ttl has expired. Without # # -s Squid will just annoy the user by "randomly" denying requests. # # (the counter is reset each time the limit is reached and a # # request is denied) # # NOTE: in acceleration mode or where there is mesh of child proxies, # # clients may appear to come from multiple addresses if they are # # going through proxy farms, so a limit of 1 may cause user problems. # # acl aclname random probability # # Pseudo-randomly match requests. Based on the probability given. # # Probability may be written as a decimal (0.333), fraction (1/3) # # or ratio of matches:non-matches (3:5). # # acl aclname req_mime_type [-i] mime-type ... # # regex match against the mime type of the request generated # # by the client. Can be used to detect file upload or some # # types HTTP tunneling requests [fast] # # NOTE: This does NOT match the reply. You cannot use this # # to match the returned file type. # # acl aclname req_header header-name [-i] any\.regex\.here # # regex match against any of the known request headers. May be # # thought of as a superset of "browser", "referer" and "mime-type" # # ACL [fast] # # acl aclname rep_mime_type [-i] mime-type ... # # regex match against the mime type of the reply received by # # squid. Can be used to detect file download or some # # types HTTP tunneling requests. [fast] # # NOTE: This has no effect in http_access rules. It only has # # effect in rules that affect the reply data stream such as # # http_reply_access. # # acl aclname rep_header header-name [-i] any\.regex\.here # # regex match against any of the known reply headers. May be # # thought of as a superset of "browser", "referer" and "mime-type" # # ACLs [fast] # # acl aclname external class_name [arguments...] # # external ACL lookup via a helper class defined by the # # external_acl_type directive [slow] # # acl aclname user_cert attribute values... # # match against attributes in a user SSL certificate # # attribute is one of DN/C/O/CN/L/ST or a numerical OID [fast] # # acl aclname ca_cert attribute values... # # match against attributes a users issuing CA SSL certificate # # attribute is one of DN/C/O/CN/L/ST or a numerical OID [fast] # # acl aclname ext_user [-i] username ... # acl aclname ext_user_regex [-i] pattern ... # # string match on username returned by external acl helper [slow] # # use REQUIRED to accept any non-null user name. # # acl aclname tag tagvalue ... # # string match on tag returned by external acl helper [fast] # # DEPRECATED. Only the first tag will match with this ACL. # # Use the 'note' ACL instead for handling multiple tag values. # # acl aclname hier_code codename ... # # string match against squid hierarchy code(s); [fast] # # e.g., DIRECT, PARENT_HIT, NONE, etc. # # # # NOTE: This has no effect in http_access rules. It only has # # effect in rules that affect the reply data stream such as # # http_reply_access. # # acl aclname note [-m[=delimiters]] name [value ...] # # match transaction annotation [fast] # # Without values, matches any annotation with a given name. # # With value(s), matches any annotation with a given name that # # also has one of the given values. # # If the -m flag is used, then the value of the named # # annotation is interpreted as a list of tokens, and the ACL # # matches individual name=token pairs rather than whole # # name=value pairs. See "ACL Options" above for more info. # # Annotation sources include note and adaptation_meta directives # # as well as helper and eCAP responses. # # acl aclname adaptation_service service ... # # Matches the name of any icap_service, ecap_service, # # adaptation_service_set, or adaptation_service_chain that Squid # # has used (or attempted to use) for the master transaction. # # This ACL must be defined after the corresponding adaptation # # service is named in squid.conf. This ACL is usable with # # adaptation_meta because it starts matching immediately after # # the service has been selected for adaptation. # # acl aclname transaction_initiator initiator ... # # Matches transaction's initiator [fast] # # # # Supported initiators are: # # esi: matches transactions fetching ESI resources # # certificate-fetching: matches transactions fetching # # a missing intermediate TLS certificate # # cache-digest: matches transactions fetching Cache Digests # # from a cache_peer # # htcp: matches HTCP requests from peers # # icp: matches ICP requests to peers # # icmp: matches ICMP RTT database (NetDB) requests to peers # # asn: matches asns db requests # # internal: matches any of the above # # client: matches transactions containing an HTTP or FTP # # client request received at a Squid *_port # # all: matches any transaction, including internal transactions # # without a configurable initiator and hopefully rare # # transactions without a known-to-Squid initiator # # # # Multiple initiators are ORed. # # acl aclname has component # # matches a transaction "component" [fast] # # # # Supported transaction components are: # # request: transaction has a request header (at least) # # response: transaction has a response header (at least) # # ALE: transaction has an internally-generated Access Log Entry # # structure; bugs notwithstanding, all transaction have it # # # # For example, the following configuration helps when dealing with HTTP # # clients that close connections without sending a request header: # # # # acl hasRequest has request # # acl logMe note important_transaction # # # avoid "logMe ACL is used in context without an HTTP request" warnings # # access_log ... logformat=detailed hasRequest logMe # # # log request-less transactions, instead of ignoring them # # access_log ... logformat=brief !hasRequest # # # # Multiple components are not supported for one "acl" rule, but # # can be specified (and are ORed) using multiple same-name rules: # # # # # OK, this strange logging daemon needs request or response, # # # but can work without either a request or a response: # # acl hasWhatMyLoggingDaemonNeeds has request # # acl hasWhatMyLoggingDaemonNeeds has response # # acl aclname ssl_error errorname # # match against SSL certificate validation error [fast] # # # # For valid error names see in /opt/local/share/squid/errors/templates/error-details.txt # # template file. # # # # The following can be used as shortcuts for certificate properties: # # [ssl::]certHasExpired: the "not after" field is in the past # # [ssl::]certNotYetValid: the "not before" field is in the future # # [ssl::]certUntrusted: The certificate issuer is not to be trusted. # # [ssl::]certSelfSigned: The certificate is self signed. # # [ssl::]certDomainMismatch: The certificate CN domain does not # # match the name the name of the host we are connecting to. # # # # The ssl::certHasExpired, ssl::certNotYetValid, ssl::certDomainMismatch, # # ssl::certUntrusted, and ssl::certSelfSigned can also be used as # # predefined ACLs, just like the 'all' ACL. # # # # NOTE: The ssl_error ACL is only supported with sslproxy_cert_error, # # sslproxy_cert_sign, and sslproxy_cert_adapt options. # # acl aclname server_cert_fingerprint [-sha1] fingerprint # # match against server SSL certificate fingerprint [fast] # # # # The fingerprint is the digest of the DER encoded version # # of the whole certificate. The user should use the form: XX:XX:... # # Optional argument specifies the digest algorithm to use. # # The SHA1 digest algorithm is the default and is currently # # the only algorithm supported (-sha1). # # acl aclname at_step step # # match against the current step during ssl_bump evaluation [fast] # # Never matches and should not be used outside the ssl_bump context. # # # # At each SslBump step, Squid evaluates ssl_bump directives to find # # the next bumping action (e.g., peek or splice). Valid SslBump step # # values and the corresponding ssl_bump evaluation moments are: # # SslBump1: After getting TCP-level and HTTP CONNECT info. # # SslBump2: After getting SSL Client Hello info. # # SslBump3: After getting SSL Server Hello info. # # acl aclname ssl::server_name [option] .foo.com ... # # matches server name obtained from various sources [fast] # # # # The ACL computes server name(s) using such information sources as # # CONNECT request URI, TLS client SNI, and TLS server certificate # # subject (CN and SubjectAltName). The computed server name(s) usually # # change with each SslBump step, as more info becomes available: # # * SNI is used as the server name instead of the request URI, # # * subject name(s) from the server certificate (CN and # # SubjectAltName) are used as the server names instead of SNI. # # # # When the ACL computes multiple server names, matching any single # # computed name is sufficient for the ACL to match. # # # # The "none" name can be used to match transactions where the ACL # # could not compute the server name using any information source # # that was both available and allowed to be used by the ACL options at # # the ACL evaluation time. # # # # Unlike dstdomain, this ACL does not perform DNS lookups. # # # # An ACL option below may be used to restrict what information # # sources are used to extract the server names from: # # # # --client-requested # # The server name is SNI regardless of what the server says. # # --server-provided # # The server name(s) are the certificate subject name(s), regardless # # of what the client has requested. If the server certificate is # # unavailable, then the name is "none". # # --consensus # # The server name is either SNI (if SNI matches at least one of the # # certificate subject names) or "none" (otherwise). When the server # # certificate is unavailable, the consensus server name is SNI. # # # # Combining multiple options in one ACL is a fatal configuration # # error. # # # # For all options: If no SNI is available, then the CONNECT request # # target (a.k.a. URI) is used instead of SNI (for an intercepted # # connection, this target is the destination IP address). # # acl aclname ssl::server_name_regex [-i] \.foo\.com ... # # regex matches server name obtained from various sources [fast] # # acl aclname connections_encrypted # # matches transactions with all HTTP messages received over TLS # # transport connections. [fast] # # # # The master transaction deals with HTTP messages received from # # various sources. All sources used by the master transaction in the # # past are considered by the ACL. The following rules define whether # # a given message source taints the entire master transaction, # # resulting in ACL mismatches: # # # # * The HTTP client transport connection is not TLS. # # * An adaptation service connection-encryption flag is off. # # * The peer or origin server transport connection is not TLS. # # # # Caching currently does not affect these rules. This cache ignorance # # implies that only the current HTTP client transport and REQMOD # # services status determine whether this ACL matches a from-cache # # transaction. The source of the cached response does not have any # # effect on future transaction that use the cached response without # # revalidation. This may change. # # # # DNS, ICP, and HTCP exchanges during the master transaction do not # # affect these rules. # acl aclname any-of acl1 acl2 ... # # match any one of the acls [fast or slow] # # The first matching ACL stops further ACL evaluation. # # # # ACLs from multiple any-of lines with the same name are ORed. # # For example, A = (a1 or a2) or (a3 or a4) can be written as # # acl A any-of a1 a2 # # acl A any-of a3 a4 # # # # This group ACL is fast if all evaluated ACLs in the group are fast # # and slow otherwise. # # acl aclname all-of acl1 acl2 ... # # match all of the acls [fast or slow] # # The first mismatching ACL stops further ACL evaluation. # # # # ACLs from multiple all-of lines with the same name are ORed. # # For example, B = (b1 and b2) or (b3 and b4) can be written as # # acl B all-of b1 b2 # # acl B all-of b3 b4 # # # # This group ACL is fast if all evaluated ACLs in the group are fast # # and slow otherwise. # # Examples: # acl macaddress arp 09:00:2b:23:45:67 # acl myexample dst_as 1241 # acl password proxy_auth REQUIRED # acl fileupload req_mime_type -i ^multipart/form-data$ # acl javascript rep_mime_type -i ^application/x-javascript$ # #Default: # ACLs all, manager, localhost, and to_localhost are predefined. # # # Recommended minimum configuration: # # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl localnet src 10.0.0.0/8 # RFC1918 possible internal network #acl localnet src 172.16.0.0/12 # RFC1918 possible internal network #acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT # TAG: proxy_protocol_access # Determine which client proxies can be trusted to provide correct # information regarding real client IP address using PROXY protocol. # # Requests may pass through a chain of several other proxies # before reaching us. The original source details may by sent in: # * HTTP message Forwarded header, or # * HTTP message X-Forwarded-For header, or # * PROXY protocol connection header. # # This directive is solely for validating new PROXY protocol # connections received from a port flagged with require-proxy-header. # It is checked only once after TCP connection setup. # # A deny match results in TCP connection closure. # # An allow match is required for Squid to permit the corresponding # TCP connection, before Squid even looks for HTTP request headers. # If there is an allow match, Squid starts using PROXY header information # to determine the source address of the connection for all future ACL # checks, logging, etc. # # SECURITY CONSIDERATIONS: # # Any host from which we accept client IP details can place # incorrect information in the relevant header, and Squid # will use the incorrect information as if it were the # source address of the request. This may enable remote # hosts to bypass any access control restrictions that are # based on the client's source addresses. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # all TCP connections to ports with require-proxy-header will be denied # TAG: follow_x_forwarded_for # Determine which client proxies can be trusted to provide correct # information regarding real client IP address. # # Requests may pass through a chain of several other proxies # before reaching us. The original source details may by sent in: # * HTTP message Forwarded header, or # * HTTP message X-Forwarded-For header, or # * PROXY protocol connection header. # # PROXY protocol connections are controlled by the proxy_protocol_access # directive which is checked before this. # # If a request reaches us from a source that is allowed by this # directive, then we trust the information it provides regarding # the IP of the client it received from (if any). # # For the purpose of ACLs used in this directive the src ACL type always # matches the address we are testing and srcdomain matches its rDNS. # # On each HTTP request Squid checks for X-Forwarded-For header fields. # If found the header values are iterated in reverse order and an allow # match is required for Squid to continue on to the next value. # The verification ends when a value receives a deny match, cannot be # tested, or there are no more values to test. # NOTE: Squid does not yet follow the Forwarded HTTP header. # # The end result of this process is an IP address that we will # refer to as the indirect client address. This address may # be treated as the client address for access control, ICAP, delay # pools and logging, depending on the acl_uses_indirect_client, # icap_uses_indirect_client, delay_pool_uses_indirect_client, # log_uses_indirect_client and tproxy_uses_indirect_client options. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # # SECURITY CONSIDERATIONS: # # Any host from which we accept client IP details can place # incorrect information in the relevant header, and Squid # will use the incorrect information as if it were the # source address of the request. This may enable remote # hosts to bypass any access control restrictions that are # based on the client's source addresses. # # For example: # # acl localhost src 127.0.0.1 # acl my_other_proxy srcdomain .proxy.example.com # follow_x_forwarded_for allow localhost # follow_x_forwarded_for allow my_other_proxy #Default: # X-Forwarded-For header will be ignored. # TAG: acl_uses_indirect_client on|off # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address in acl matching. # # NOTE: maxconn ACL considers direct TCP links and indirect # clients will always have zero. So no match. #Default: # acl_uses_indirect_client on # TAG: delay_pool_uses_indirect_client on|off # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address in delay pools. #Default: # delay_pool_uses_indirect_client on # TAG: log_uses_indirect_client on|off # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address in the access log. #Default: # log_uses_indirect_client on # TAG: tproxy_uses_indirect_client on|off # Note: This option is only available if Squid is rebuilt with the # --enable-follow-x-forwarded-for and --enable-linux-netfilter # # Controls whether the indirect client address # (see follow_x_forwarded_for) is used instead of the # direct client address when spoofing the outgoing client. # # This has no effect on requests arriving in non-tproxy # mode ports. # # SECURITY WARNING: Usage of this option is dangerous # and should not be used trivially. Correct configuration # of follow_x_forwarded_for with a limited set of trusted # sources is required to prevent abuse of your proxy. #Default: # tproxy_uses_indirect_client off # TAG: spoof_client_ip # Control client IP address spoofing of TPROXY traffic based on # defined access lists. # # spoof_client_ip allow|deny [!]aclname ... # # If there are no "spoof_client_ip" lines present, the default # is to "allow" spoofing of any suitable request. # # Note that the cache_peer "no-tproxy" option overrides this ACL. # # This clause supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow spoofing on all TPROXY traffic. # TAG: http_access # Allowing or Denying access based on defined access lists # # To allow or deny a message received on an HTTP, HTTPS, or FTP port: # http_access allow|deny [!]aclname ... # # NOTE on default values: # # If there are no "access" lines present, the default is to deny # the request. # # If none of the "access" lines cause a match, the default is the # opposite of the last line in the list. If the last line was # deny, the default is allow. Conversely, if the last line # is allow, the default will be deny. For these reasons, it is a # good idea to have an "deny all" entry at the end of your access # lists to avoid potential confusion. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # #Default: # Deny, unless rules exist in squid.conf. # # # Recommended minimum Access Permission configuration: # # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # Only allow cachemgr access from localhost http_access allow localhost manager http_access deny manager # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow localnet http_access allow localhost # And finally deny all other access to this proxy http_access deny all # TAG: adapted_http_access # Allowing or Denying access based on defined access lists # # Essentially identical to http_access, but runs after redirectors # and ICAP/eCAP adaptation. Allowing access control based on their # output. # # If not set then only http_access is used. #Default: # Allow, unless rules exist in squid.conf. # TAG: http_reply_access # Allow replies to client requests. This is complementary to http_access. # # http_reply_access allow|deny [!] aclname ... # # NOTE: if there are no access lines present, the default is to allow # all replies. # # If none of the access lines cause a match the opposite of the # last line will apply. Thus it is good practice to end the rules # with an "allow all" or "deny all" entry. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow, unless rules exist in squid.conf. # TAG: icp_access # Allowing or Denying access to the ICP port based on defined # access lists # # icp_access allow|deny [!]aclname ... # # NOTE: The default if no icp_access lines are present is to # deny all traffic. This default may cause problems with peers # using ICP. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # ## Allow ICP queries from local networks only icp_access allow localnet icp_access deny all #Default: # Deny, unless rules exist in squid.conf. # TAG: htcp_access # Allowing or Denying access to the HTCP port based on defined # access lists # # htcp_access allow|deny [!]aclname ... # # See also htcp_clr_access for details on access control for # cache purge (CLR) HTCP messages. # # NOTE: The default if no htcp_access lines are present is to # deny all traffic. This default may cause problems with peers # using the htcp option. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # ## Allow HTCP queries from local networks only ##htcp_access allow localnet ##htcp_access deny all #Default: # Deny, unless rules exist in squid.conf. # TAG: htcp_clr_access # Allowing or Denying access to purge content using HTCP based # on defined access lists. # See htcp_access for details on general HTCP access control. # # htcp_clr_access allow|deny [!]aclname ... # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # ## Allow HTCP CLR requests from trusted peers #acl htcp_clr_peer src 192.0.2.2 2001:DB8::2 #htcp_clr_access allow htcp_clr_peer #htcp_clr_access deny all #Default: # Deny, unless rules exist in squid.conf. # TAG: miss_access # Determines whether network access is permitted when satisfying a request. # # For example; # to force your neighbors to use you as a sibling instead of # a parent. # # acl localclients src 192.0.2.0/24 2001:DB8::a:0/64 # miss_access deny !localclients # miss_access allow all # # This means only your local clients are allowed to fetch relayed/MISS # replies from the network and all other clients can only fetch cached # objects (HITs). # # The default for this setting allows all clients who passed the # http_access rules to relay via this proxy. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow, unless rules exist in squid.conf. # TAG: ident_lookup_access # A list of ACL elements which, if matched, cause an ident # (RFC 931) lookup to be performed for this request. For # example, you might choose to always perform ident lookups # for your main multi-user Unix boxes, but not for your Macs # and PCs. By default, ident lookups are not performed for # any requests. # # To enable ident lookups for specific client addresses, you # can follow this example: # # acl ident_aware_hosts src 198.168.1.0/24 # ident_lookup_access allow ident_aware_hosts # ident_lookup_access deny all # # Only src type ACL checks are fully supported. A srcdomain # ACL might work at times, but it will not always provide # the correct result. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Unless rules exist in squid.conf, IDENT is not fetched. # TAG: reply_body_max_size size [acl acl...] # This option specifies the maximum size of a reply body. It can be # used to prevent users from downloading very large files, such as # MP3's and movies. When the reply headers are received, the # reply_body_max_size lines are processed, and the first line where # all (if any) listed ACLs are true is used as the maximum body size # for this reply. # # This size is checked twice. First when we get the reply headers, # we check the content-length value. If the content length value exists # and is larger than the allowed size, the request is denied and the # user receives an error message that says "the request or reply # is too large." If there is no content-length, and the reply # size exceeds this limit, the client's connection is just closed # and they will receive a partial reply. # # WARNING: downstream caches probably can not detect a partial reply # if there is no content-length header, so they will cache # partial responses and give them out as hits. You should NOT # use this option if you have downstream caches. # # WARNING: A maximum size smaller than the size of squid's error messages # will cause an infinite loop and crash squid. Ensure that the smallest # non-zero value you use is greater that the maximum header size plus # the size of your largest error page. # # If you set this parameter none (the default), there will be # no limit imposed. # # Configuration Format is: # reply_body_max_size SIZE UNITS [acl ...] # ie. # reply_body_max_size 10 MB # #Default: # No limit is applied. # TAG: on_unsupported_protocol # Determines Squid behavior when encountering strange requests at the # beginning of an accepted TCP connection or the beginning of a bumped # CONNECT tunnel. Controlling Squid reaction to unexpected traffic is # especially useful in interception environments where Squid is likely # to see connections for unsupported protocols that Squid should either # terminate or tunnel at TCP level. # # on_unsupported_protocol [!]acl ... # # The first matching action wins. Only fast ACLs are supported. # # Supported actions are: # # tunnel: Establish a TCP connection with the intended server and # blindly shovel TCP packets between the client and server. # # respond: Respond with an error message, using the transfer protocol # for the Squid port that received the request (e.g., HTTP # for connections intercepted at the http_port). This is the # default. # # Squid expects the following traffic patterns: # # http_port: a plain HTTP request # https_port: SSL/TLS handshake followed by an [encrypted] HTTP request # ftp_port: a plain FTP command (no on_unsupported_protocol support yet!) # CONNECT tunnel on http_port: same as https_port # CONNECT tunnel on https_port: same as https_port # # Currently, this directive has effect on intercepted connections and # bumped tunnels only. Other cases are not supported because Squid # cannot know the intended destination of other traffic. # # For example: # # define what Squid errors indicate receiving non-HTTP traffic: # acl foreignProtocol squid_error ERR_PROTOCOL_UNKNOWN ERR_TOO_BIG # # define what Squid errors indicate receiving nothing: # acl serverTalksFirstProtocol squid_error ERR_REQUEST_START_TIMEOUT # # tunnel everything that does not look like HTTP: # on_unsupported_protocol tunnel foreignProtocol # # tunnel if we think the client waits for the server to talk first: # on_unsupported_protocol tunnel serverTalksFirstProtocol # # in all other error cases, just send an HTTP "error page" response: # on_unsupported_protocol respond all # # See also: squid_error ACL #Default: # Respond with an error message to unidentifiable traffic # NETWORK OPTIONS # ----------------------------------------------------------------------------- # TAG: http_port # Usage: port [mode] [options] # hostname:port [mode] [options] # 1.2.3.4:port [mode] [options] # # The socket addresses where Squid will listen for HTTP client # requests. You may specify multiple socket addresses. # There are three forms: port alone, hostname with port, and # IP address with port. If you specify a hostname or IP # address, Squid binds the socket to that specific # address. Most likely, you do not need to bind to a specific # address, so you can use the port number alone. # # If you are running Squid in accelerator mode, you # probably want to listen on port 80 also, or instead. # # The -a command line option may be used to specify additional # port(s) where Squid listens for proxy request. Such ports will # be plain proxy ports with no options. # # You may specify multiple socket addresses on multiple lines. # # Modes: # # intercept Support for IP-Layer NAT interception delivering # traffic to this Squid port. # NP: disables authentication on the port. # # tproxy Support Linux TPROXY (or BSD divert-to) with spoofing # of outgoing connections using the client IP address. # NP: disables authentication on the port. # # accel Accelerator / reverse proxy mode # # ssl-bump For each CONNECT request allowed by ssl_bump ACLs, # establish secure connection with the client and with # the server, decrypt HTTPS messages as they pass through # Squid, and treat them as unencrypted HTTP messages, # becoming the man-in-the-middle. # # The ssl_bump option is required to fully enable # bumping of CONNECT requests. # # Omitting the mode flag causes default forward proxy mode to be used. # # # Accelerator Mode Options: # # defaultsite=domainname # What to use for the Host: header if it is not present # in a request. Determines what site (not origin server) # accelerators should consider the default. # # no-vhost Disable using HTTP/1.1 Host header for virtual domain support. # # protocol= Protocol to reconstruct accelerated and intercepted # requests with. Defaults to HTTP/1.1 for http_port and # HTTPS/1.1 for https_port. # When an unsupported value is configured Squid will # produce a FATAL error. # Values: HTTP or HTTP/1.1, HTTPS or HTTPS/1.1 # # vport Virtual host port support. Using the http_port number # instead of the port passed on Host: headers. # # vport=NN Virtual host port support. Using the specified port # number instead of the port passed on Host: headers. # # act-as-origin # Act as if this Squid is the origin server. # This currently means generate new Date: and Expires: # headers on HIT instead of adding Age:. # # ignore-cc Ignore request Cache-Control headers. # # WARNING: This option violates HTTP specifications if # used in non-accelerator setups. # # allow-direct Allow direct forwarding in accelerator mode. Normally # accelerated requests are denied direct forwarding as if # never_direct was used. # # WARNING: this option opens accelerator mode to security # vulnerabilities usually only affecting in interception # mode. Make sure to protect forwarding with suitable # http_access rules when using this. # # # SSL Bump Mode Options: # In addition to these options ssl-bump requires TLS/SSL options. # # generate-host-certificates[=] # Dynamically create SSL server certificates for the # destination hosts of bumped CONNECT requests.When # enabled, the cert and key options are used to sign # generated certificates. Otherwise generated # certificate will be selfsigned. # If there is a CA certificate lifetime of the generated # certificate equals lifetime of the CA certificate. If # generated certificate is selfsigned lifetime is three # years. # This option is enabled by default when ssl-bump is used. # See the ssl-bump option above for more information. # # dynamic_cert_mem_cache_size=SIZE # Approximate total RAM size spent on cached generated # certificates. If set to zero, caching is disabled. The # default value is 4MB. # # TLS / SSL Options: # # tls-cert= Path to file containing an X.509 certificate (PEM format) # to be used in the TLS handshake ServerHello. # # If this certificate is constrained by KeyUsage TLS # feature it must allow HTTP server usage, along with # any additional restrictions imposed by your choice # of options= settings. # # When OpenSSL is used this file may also contain a # chain of intermediate CA certificates to send in the # TLS handshake. # # When GnuTLS is used this option (and any paired # tls-key= option) may be repeated to load multiple # certificates for different domains. # # Also, when generate-host-certificates=on is configured # the first tls-cert= option must be a CA certificate # capable of signing the automatically generated # certificates. # # tls-key= Path to a file containing private key file (PEM format) # for the previous tls-cert= option. # # If tls-key= is not specified tls-cert= is assumed to # reference a PEM file containing both the certificate # and private key. # # cipher= Colon separated list of supported ciphers. # NOTE: some ciphers such as EDH ciphers depend on # additional settings. If those settings are # omitted the ciphers may be silently ignored # by the OpenSSL library. # # options= Various SSL implementation options. The most important # being: # # NO_SSLv3 Disallow the use of SSLv3 # # NO_TLSv1 Disallow the use of TLSv1.0 # # NO_TLSv1_1 Disallow the use of TLSv1.1 # # NO_TLSv1_2 Disallow the use of TLSv1.2 # # SINGLE_DH_USE # Always create a new key when using # temporary/ephemeral DH key exchanges # # SINGLE_ECDH_USE # Enable ephemeral ECDH key exchange. # The adopted curve should be specified # using the tls-dh option. # # NO_TICKET # Disable use of RFC5077 session tickets. # Some servers may have problems # understanding the TLS extension due # to ambiguous specification in RFC4507. # # ALL Enable various bug workarounds # suggested as "harmless" by OpenSSL # Be warned that this reduces SSL/TLS # strength to some attacks. # # See the OpenSSL SSL_CTX_set_options documentation for a # more complete list. # # clientca= File containing the list of CAs to use when # requesting a client certificate. # # tls-cafile= PEM file containing CA certificates to use when verifying # client certificates. If not configured clientca will be # used. May be repeated to load multiple files. # # capath= Directory containing additional CA certificates # and CRL lists to use when verifying client certificates. # Requires OpenSSL or LibreSSL. # # crlfile= File of additional CRL lists to use when verifying # the client certificate, in addition to CRLs stored in # the capath. Implies VERIFY_CRL flag below. # # tls-dh=[curve:]file # File containing DH parameters for temporary/ephemeral DH key # exchanges, optionally prefixed by a curve for ephemeral ECDH # key exchanges. # See OpenSSL documentation for details on how to create the # DH parameter file. Supported curves for ECDH can be listed # using the "openssl ecparam -list_curves" command. # WARNING: EDH and EECDH ciphers will be silently disabled if # this option is not set. # # sslflags= Various flags modifying the use of SSL: # DELAYED_AUTH # Don't request client certificates # immediately, but wait until acl processing # requires a certificate (not yet implemented). # NO_SESSION_REUSE # Don't allow for session reuse. Each connection # will result in a new SSL session. # VERIFY_CRL # Verify CRL lists when accepting client # certificates. # VERIFY_CRL_ALL # Verify CRL lists for all certificates in the # client certificate chain. # # tls-default-ca[=off] # Whether to use the system Trusted CAs. Default is OFF. # # tls-no-npn Do not use the TLS NPN extension to advertise HTTP/1.1. # # sslcontext= SSL session ID context identifier. # # Other Options: # # connection-auth[=on|off] # use connection-auth=off to tell Squid to prevent # forwarding Microsoft connection oriented authentication # (NTLM, Negotiate and Kerberos) # # disable-pmtu-discovery= # Control Path-MTU discovery usage: # off lets OS decide on what to do (default). # transparent disable PMTU discovery when transparent # support is enabled. # always disable always PMTU discovery. # # In many setups of transparently intercepting proxies # Path-MTU discovery can not work on traffic towards the # clients. This is the case when the intercepting device # does not fully track connections and fails to forward # ICMP must fragment messages to the cache server. If you # have such setup and experience that certain clients # sporadically hang or never complete requests set # disable-pmtu-discovery option to 'transparent'. # # name= Specifies a internal name for the port. Defaults to # the port specification (port or addr:port) # # tcpkeepalive[=idle,interval,timeout] # Enable TCP keepalive probes of idle connections. # In seconds; idle is the initial time before TCP starts # probing the connection, interval how often to probe, and # timeout the time before giving up. # # require-proxy-header # Require PROXY protocol version 1 or 2 connections. # The proxy_protocol_access is required to whitelist # downstream proxies which can be trusted. # # If you run Squid on a dual-homed machine with an internal # and an external interface we recommend you to specify the # internal address:port in http_port. This way Squid will only be # visible on the internal address. # # # Squid normally listens to port 3128 http_port 127.0.0.1:3128 # TAG: https_port # Usage: [ip:]port cert=certificate.pem [key=key.pem] [mode] [options...] # # The socket address where Squid will listen for client requests made # over TLS or SSL connections. Commonly referred to as HTTPS. # # This is most useful for situations where you are running squid in # accelerator mode and you want to do the TLS work at the accelerator # level. # # You may specify multiple socket addresses on multiple lines, # each with their own certificate and/or options. # # The tls-cert= option is mandatory on HTTPS ports. # # See http_port for a list of modes and options. #Default: # none # TAG: ftp_port # Enables Native FTP proxy by specifying the socket address where Squid # listens for FTP client requests. See http_port directive for various # ways to specify the listening address and mode. # # Usage: ftp_port address [mode] [options] # # WARNING: This is a new, experimental, complex feature that has seen # limited production exposure. Some Squid modules (e.g., caching) do not # currently work with native FTP proxying, and many features have not # even been tested for compatibility. Test well before deploying! # # Native FTP proxying differs substantially from proxying HTTP requests # with ftp:// URIs because Squid works as an FTP server and receives # actual FTP commands (rather than HTTP requests with FTP URLs). # # Native FTP commands accepted at ftp_port are internally converted or # wrapped into HTTP-like messages. The same happens to Native FTP # responses received from FTP origin servers. Those HTTP-like messages # are shoveled through regular access control and adaptation layers # between the FTP client and the FTP origin server. This allows Squid to # examine, adapt, block, and log FTP exchanges. Squid reuses most HTTP # mechanisms when shoveling wrapped FTP messages. For example, # http_access and adaptation_access directives are used. # # Modes: # # intercept Same as http_port intercept. The FTP origin address is # determined based on the intended destination of the # intercepted connection. # # tproxy Support Linux TPROXY for spoofing outgoing # connections using the client IP address. # NP: disables authentication and maybe IPv6 on the port. # # By default (i.e., without an explicit mode option), Squid extracts the # FTP origin address from the login@origin parameter of the FTP USER # command. Many popular FTP clients support such native FTP proxying. # # Options: # # name=token Specifies an internal name for the port. Defaults to # the port address. Usable with myportname ACL. # # ftp-track-dirs # Enables tracking of FTP directories by injecting extra # PWD commands and adjusting Request-URI (in wrapping # HTTP requests) to reflect the current FTP server # directory. Tracking is disabled by default. # # protocol=FTP Protocol to reconstruct accelerated and intercepted # requests with. Defaults to FTP. No other accepted # values have been tested with. An unsupported value # results in a FATAL error. Accepted values are FTP, # HTTP (or HTTP/1.1), and HTTPS (or HTTPS/1.1). # # Other http_port modes and options that are not specific to HTTP and # HTTPS may also work. #Default: # none # TAG: tcp_outgoing_tos # Allows you to select a TOS/Diffserv value for packets outgoing # on the server side, based on an ACL. # # tcp_outgoing_tos ds-field [!]aclname ... # # Example where normal_service_net uses the TOS value 0x00 # and good_service_net uses 0x20 # # acl normal_service_net src 10.0.0.0/24 # acl good_service_net src 10.0.1.0/24 # tcp_outgoing_tos 0x00 normal_service_net # tcp_outgoing_tos 0x20 good_service_net # # TOS/DSCP values really only have local significance - so you should # know what you're specifying. For more information, see RFC2474, # RFC2475, and RFC3260. # # The TOS/DSCP byte must be exactly that - a octet value 0 - 255, or # "default" to use whatever default your host has. # Note that only multiples of 4 are usable as the two rightmost bits have # been redefined for use by ECN (RFC 3168 section 23.1). # The squid parser will enforce this by masking away the ECN bits. # # Processing proceeds in the order specified, and stops at first fully # matching line. # # Only fast ACLs are supported. #Default: # none # TAG: clientside_tos # Allows you to select a TOS/DSCP value for packets being transmitted # on the client-side, based on an ACL. # # clientside_tos ds-field [!]aclname ... # # Example where normal_service_net uses the TOS value 0x00 # and good_service_net uses 0x20 # # acl normal_service_net src 10.0.0.0/24 # acl good_service_net src 10.0.1.0/24 # clientside_tos 0x00 normal_service_net # clientside_tos 0x20 good_service_net # # Note: This feature is incompatible with qos_flows. Any TOS values set here # will be overwritten by TOS values in qos_flows. # # The TOS/DSCP byte must be exactly that - a octet value 0 - 255, or # "default" to use whatever default your host has. # Note that only multiples of 4 are usable as the two rightmost bits have # been redefined for use by ECN (RFC 3168 section 23.1). # The squid parser will enforce this by masking away the ECN bits. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # none # TAG: tcp_outgoing_mark # Note: This option is only available if Squid is rebuilt with the # Packet MARK (Linux) # # Allows you to apply a Netfilter mark value to outgoing packets # on the server side, based on an ACL. # # tcp_outgoing_mark mark-value [!]aclname ... # # Example where normal_service_net uses the mark value 0x00 # and good_service_net uses 0x20 # # acl normal_service_net src 10.0.0.0/24 # acl good_service_net src 10.0.1.0/24 # tcp_outgoing_mark 0x00 normal_service_net # tcp_outgoing_mark 0x20 good_service_net # # Only fast ACLs are supported. #Default: # none # TAG: clientside_mark # Note: This option is only available if Squid is rebuilt with the # Packet MARK (Linux) # # Allows you to apply a Netfilter mark value to packets being transmitted # on the client-side, based on an ACL. # # clientside_mark mark-value [!]aclname ... # # Example where normal_service_net uses the mark value 0x00 # and good_service_net uses 0x20 # # acl normal_service_net src 10.0.0.0/24 # acl good_service_net src 10.0.1.0/24 # clientside_mark 0x00 normal_service_net # clientside_mark 0x20 good_service_net # # Note: This feature is incompatible with qos_flows. Any mark values set here # will be overwritten by mark values in qos_flows. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # none # TAG: qos_flows # Allows you to select a TOS/DSCP value to mark outgoing # connections to the client, based on where the reply was sourced. # For platforms using netfilter, allows you to set a netfilter mark # value instead of, or in addition to, a TOS value. # # By default this functionality is disabled. To enable it with the default # settings simply use "qos_flows mark" or "qos_flows tos". Default # settings will result in the netfilter mark or TOS value being copied # from the upstream connection to the client. Note that it is the connection # CONNMARK value not the packet MARK value that is copied. # # It is not currently possible to copy the mark or TOS value from the # client to the upstream connection request. # # TOS values really only have local significance - so you should # know what you're specifying. For more information, see RFC2474, # RFC2475, and RFC3260. # # The TOS/DSCP byte must be exactly that - a octet value 0 - 255. # Note that only multiples of 4 are usable as the two rightmost bits have # been redefined for use by ECN (RFC 3168 section 23.1). # The squid parser will enforce this by masking away the ECN bits. # # Mark values can be any unsigned 32-bit integer value. # # This setting is configured by setting the following values: # # tos|mark Whether to set TOS or netfilter mark values # # local-hit=0xFF Value to mark local cache hits. # # sibling-hit=0xFF Value to mark hits from sibling peers. # # parent-hit=0xFF Value to mark hits from parent peers. # # miss=0xFF[/mask] Value to mark cache misses. Takes precedence # over the preserve-miss feature (see below), unless # mask is specified, in which case only the bits # specified in the mask are written. # # The TOS variant of the following features are only possible on Linux # and require your kernel to be patched with the TOS preserving ZPH # patch, available from http://zph.bratcheda.org # No patch is needed to preserve the netfilter mark, which will work # with all variants of netfilter. # # disable-preserve-miss # This option disables the preservation of the TOS or netfilter # mark. By default, the existing TOS or netfilter mark value of # the response coming from the remote server will be retained # and masked with miss-mark. # NOTE: in the case of a netfilter mark, the mark must be set on # the connection (using the CONNMARK target) not on the packet # (MARK target). # # miss-mask=0xFF # Allows you to mask certain bits in the TOS or mark value # received from the remote server, before copying the value to # the TOS sent towards clients. # Default for tos: 0xFF (TOS from server is not changed). # Default for mark: 0xFFFFFFFF (mark from server is not changed). # # All of these features require the --enable-zph-qos compilation flag # (enabled by default). Netfilter marking also requires the # libnetfilter_conntrack libraries (--with-netfilter-conntrack) and # libcap 2.09+ (--with-libcap). # #Default: # none # TAG: tcp_outgoing_address # Allows you to map requests to different outgoing IP addresses # based on the username or source address of the user making # the request. # # tcp_outgoing_address ipaddr [[!]aclname] ... # # For example; # Forwarding clients with dedicated IPs for certain subnets. # # acl normal_service_net src 10.0.0.0/24 # acl good_service_net src 10.0.2.0/24 # # tcp_outgoing_address 2001:db8::c001 good_service_net # tcp_outgoing_address 10.1.0.2 good_service_net # # tcp_outgoing_address 2001:db8::beef normal_service_net # tcp_outgoing_address 10.1.0.1 normal_service_net # # tcp_outgoing_address 2001:db8::1 # tcp_outgoing_address 10.1.0.3 # # Processing proceeds in the order specified, and stops at first fully # matching line. # # Squid will add an implicit IP version test to each line. # Requests going to IPv4 websites will use the outgoing 10.1.0.* addresses. # Requests going to IPv6 websites will use the outgoing 2001:db8:* addresses. # # # NOTE: The use of this directive using client dependent ACLs is # incompatible with the use of server side persistent connections. To # ensure correct results it is best to set server_persistent_connections # to off when using this directive in such configurations. # # NOTE: The use of this directive to set a local IP on outgoing TCP links # is incompatible with using TPROXY to set client IP out outbound TCP links. # When needing to contact peers use the no-tproxy cache_peer option and the # client_dst_passthru directive re-enable normal forwarding such as this. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Address selection is performed by the operating system. # TAG: host_verify_strict # Regardless of this option setting, when dealing with intercepted # traffic, Squid always verifies that the destination IP address matches # the Host header domain or IP (called 'authority form URL'). # # This enforcement is performed to satisfy a MUST-level requirement in # RFC 2616 section 14.23: "The Host field value MUST represent the naming # authority of the origin server or gateway given by the original URL". # # When set to ON: # Squid always responds with an HTTP 409 (Conflict) error # page and logs a security warning if there is no match. # # Squid verifies that the destination IP address matches # the Host header for forward-proxy and reverse-proxy traffic # as well. For those traffic types, Squid also enables the # following checks, comparing the corresponding Host header # and Request-URI components: # # * The host names (domain or IP) must be identical, # but valueless or missing Host header disables all checks. # For the two host names to match, both must be either IP # or FQDN. # # * Port numbers must be identical, but if a port is missing # the scheme-default port is assumed. # # # When set to OFF (the default): # Squid allows suspicious requests to continue but logs a # security warning and blocks caching of the response. # # * Forward-proxy traffic is not checked at all. # # * Reverse-proxy traffic is not checked at all. # # * Intercepted traffic which passes verification is handled # according to client_dst_passthru. # # * Intercepted requests which fail verification are sent # to the client original destination instead of DIRECT. # This overrides 'client_dst_passthru off'. # # For now suspicious intercepted CONNECT requests are always # responded to with an HTTP 409 (Conflict) error page. # # # SECURITY NOTE: # # As described in CVE-2009-0801 when the Host: header alone is used # to determine the destination of a request it becomes trivial for # malicious scripts on remote websites to bypass browser same-origin # security policy and sandboxing protections. # # The cause of this is that such applets are allowed to perform their # own HTTP stack, in which case the same-origin policy of the browser # sandbox only verifies that the applet tries to contact the same IP # as from where it was loaded at the IP level. The Host: header may # be different from the connected IP and approved origin. # #Default: # host_verify_strict off # TAG: client_dst_passthru # With NAT or TPROXY intercepted traffic Squid may pass the request # directly to the original client destination IP or seek a faster # source using the HTTP Host header. # # Using Host to locate alternative servers can provide faster # connectivity with a range of failure recovery options. # But can also lead to connectivity trouble when the client and # server are attempting stateful interactions unaware of the proxy. # # This option (on by default) prevents alternative DNS entries being # located to send intercepted traffic DIRECT to an origin server. # The clients original destination IP and port will be used instead. # # Regardless of this option setting, when dealing with intercepted # traffic Squid will verify the Host: header and any traffic which # fails Host verification will be treated as if this option were ON. # # see host_verify_strict for details on the verification process. #Default: # client_dst_passthru on # TLS OPTIONS # ----------------------------------------------------------------------------- # TAG: tls_outgoing_options # disable Do not support https:// URLs. # # cert=/path/to/client/certificate # A client X.509 certificate to use when connecting. # # key=/path/to/client/private_key # The private key corresponding to the cert= above. # # If key= is not specified cert= is assumed to # reference a PEM file containing both the certificate # and private key. # # cipher=... The list of valid TLS ciphers to use. # # min-version=1.N # The minimum TLS protocol version to permit. # To control SSLv3 use the options= parameter. # Supported Values: 1.0 (default), 1.1, 1.2 # # options=... Specify various TLS/SSL implementation options. # # OpenSSL options most important are: # # NO_SSLv3 Disallow the use of SSLv3 # # SINGLE_DH_USE # Always create a new key when using # temporary/ephemeral DH key exchanges # # NO_TICKET # Disable use of RFC5077 session tickets. # Some servers may have problems # understanding the TLS extension due # to ambiguous specification in RFC4507. # # ALL Enable various bug workarounds # suggested as "harmless" by OpenSSL # Be warned that this reduces SSL/TLS # strength to some attacks. # # See the OpenSSL SSL_CTX_set_options documentation # for a more complete list. # # GnuTLS options most important are: # # %NO_TICKETS # Disable use of RFC5077 session tickets. # Some servers may have problems # understanding the TLS extension due # to ambiguous specification in RFC4507. # # See the GnuTLS Priority Strings documentation # for a more complete list. # http://www.gnutls.org/manual/gnutls.html#Priority-Strings # # # cafile= PEM file containing CA certificates to use when verifying # the peer certificate. May be repeated to load multiple files. # # capath= A directory containing additional CA certificates to # use when verifying the peer certificate. # Requires OpenSSL or LibreSSL. # # crlfile=... A certificate revocation list file to use when # verifying the peer certificate. # # flags=... Specify various flags modifying the TLS implementation: # # DONT_VERIFY_PEER # Accept certificates even if they fail to # verify. # DONT_VERIFY_DOMAIN # Don't verify the peer certificate # matches the server name # # default-ca[=off] # Whether to use the system Trusted CAs. Default is ON. # # domain= The peer name as advertised in its certificate. # Used for verifying the correctness of the received peer # certificate. If not specified the peer hostname will be # used. #Default: # tls_outgoing_options min-version=1.0 # SSL OPTIONS # ----------------------------------------------------------------------------- # TAG: ssl_unclean_shutdown # Some browsers (especially MSIE) bugs out on SSL shutdown # messages. #Default: # ssl_unclean_shutdown off # TAG: ssl_engine # The OpenSSL engine to use. You will need to set this if you # would like to use hardware SSL acceleration for example. #Default: # none # TAG: sslproxy_session_ttl # Sets the timeout value for SSL sessions #Default: # sslproxy_session_ttl 300 # TAG: sslproxy_session_cache_size # Sets the cache size to use for ssl session #Default: # sslproxy_session_cache_size 2 MB # TAG: sslproxy_foreign_intermediate_certs # Many origin servers fail to send their full server certificate # chain for verification, assuming the client already has or can # easily locate any missing intermediate certificates. # # Squid uses the certificates from the specified file to fill in # these missing chains when trying to validate origin server # certificate chains. # # The file is expected to contain zero or more PEM-encoded # intermediate certificates. These certificates are not treated # as trusted root certificates, and any self-signed certificate in # this file will be ignored. #Default: # none # TAG: sslproxy_cert_sign_hash # Sets the hashing algorithm to use when signing generated certificates. # Valid algorithm names depend on the OpenSSL library used. The following # names are usually available: sha1, sha256, sha512, and md5. Please see # your OpenSSL library manual for the available hashes. By default, Squids # that support this option use sha256 hashes. # # Squid does not forcefully purge cached certificates that were generated # with an algorithm other than the currently configured one. They remain # in the cache, subject to the regular cache eviction policy, and become # useful if the algorithm changes again. #Default: # none # TAG: ssl_bump # This option is consulted when a CONNECT request is received on # an http_port (or a new connection is intercepted at an # https_port), provided that port was configured with an ssl-bump # flag. The subsequent data on the connection is either treated as # HTTPS and decrypted OR tunneled at TCP level without decryption, # depending on the first matching bumping "action". # # ssl_bump [!]acl ... # # The following bumping actions are currently supported: # # splice # Become a TCP tunnel without decrypting proxied traffic. # This is the default action. # # bump # When used on step SslBump1, establishes a secure connection # with the client first, then connect to the server. # When used on step SslBump2 or SslBump3, establishes a secure # connection with the server and, using a mimicked server # certificate, with the client. # # peek # Receive client (step SslBump1) or server (step SslBump2) # certificate while preserving the possibility of splicing the # connection. Peeking at the server certificate (during step 2) # usually precludes bumping of the connection at step 3. # # stare # Receive client (step SslBump1) or server (step SslBump2) # certificate while preserving the possibility of bumping the # connection. Staring at the server certificate (during step 2) # usually precludes splicing of the connection at step 3. # # terminate # Close client and server connections. # # Backward compatibility actions available at step SslBump1: # # client-first # Bump the connection. Establish a secure connection with the # client first, then connect to the server. This old mode does # not allow Squid to mimic server SSL certificate and does not # work with intercepted SSL connections. # # server-first # Bump the connection. Establish a secure connection with the # server first, then establish a secure connection with the # client, using a mimicked server certificate. Works with both # CONNECT requests and intercepted SSL connections, but does # not allow to make decisions based on SSL handshake info. # # peek-and-splice # Decide whether to bump or splice the connection based on # client-to-squid and server-to-squid SSL hello messages. # XXX: Remove. # # none # Same as the "splice" action. # # All ssl_bump rules are evaluated at each of the supported bumping # steps. Rules with actions that are impossible at the current step are # ignored. The first matching ssl_bump action wins and is applied at the # end of the current step. If no rules match, the splice action is used. # See the at_step ACL for a list of the supported SslBump steps. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # # See also: http_port ssl-bump, https_port ssl-bump, and acl at_step. # # # # Example: Bump all TLS connections except those originating from # # localhost or those going to example.com. # # acl broken_sites ssl::server_name .example.com # ssl_bump splice localhost # ssl_bump splice broken_sites # ssl_bump bump all #Default: # Become a TCP tunnel without decrypting proxied traffic. # TAG: sslproxy_cert_error # Use this ACL to bypass server certificate validation errors. # # For example, the following lines will bypass all validation errors # when talking to servers for example.com. All other # validation errors will result in ERR_SECURE_CONNECT_FAIL error. # # acl BrokenButTrustedServers dstdomain example.com # sslproxy_cert_error allow BrokenButTrustedServers # sslproxy_cert_error deny all # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # Using slow acl types may result in server crashes # # Without this option, all server certificate validation errors # terminate the transaction to protect Squid and the client. # # SQUID_X509_V_ERR_INFINITE_VALIDATION error cannot be bypassed # but should not happen unless your OpenSSL library is buggy. # # SECURITY WARNING: # Bypassing validation errors is dangerous because an # error usually implies that the server cannot be trusted # and the connection may be insecure. # # See also: sslproxy_flags and DONT_VERIFY_PEER. #Default: # Server certificate errors terminate the transaction. # TAG: sslproxy_cert_sign # # sslproxy_cert_sign acl ... # # The following certificate signing algorithms are supported: # # signTrusted # Sign using the configured CA certificate which is usually # placed in and trusted by end-user browsers. This is the # default for trusted origin server certificates. # # signUntrusted # Sign to guarantee an X509_V_ERR_CERT_UNTRUSTED browser error. # This is the default for untrusted origin server certificates # that are not self-signed (see ssl::certUntrusted). # # signSelf # Sign using a self-signed certificate with the right CN to # generate a X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT error in the # browser. This is the default for self-signed origin server # certificates (see ssl::certSelfSigned). # # This clause only supports fast acl types. # # When sslproxy_cert_sign acl(s) match, Squid uses the corresponding # signing algorithm to generate the certificate and ignores all # subsequent sslproxy_cert_sign options (the first match wins). If no # acl(s) match, the default signing algorithm is determined by errors # detected when obtaining and validating the origin server certificate. # # WARNING: SQUID_X509_V_ERR_DOMAIN_MISMATCH and ssl:certDomainMismatch can # be used with sslproxy_cert_adapt, but if and only if Squid is bumping a # CONNECT request that carries a domain name. In all other cases (CONNECT # to an IP address or an intercepted SSL connection), Squid cannot detect # the domain mismatch at certificate generation time when # bump-server-first is used. #Default: # none # TAG: sslproxy_cert_adapt # # sslproxy_cert_adapt acl ... # # The following certificate adaptation algorithms are supported: # # setValidAfter # Sets the "Not After" property to the "Not After" property of # the CA certificate used to sign generated certificates. # # setValidBefore # Sets the "Not Before" property to the "Not Before" property of # the CA certificate used to sign generated certificates. # # setCommonName or setCommonName{CN} # Sets Subject.CN property to the host name specified as a # CN parameter or, if no explicit CN parameter was specified, # extracted from the CONNECT request. It is a misconfiguration # to use setCommonName without an explicit parameter for # intercepted or tproxied SSL connections. # # This clause only supports fast acl types. # # Squid first groups sslproxy_cert_adapt options by adaptation algorithm. # Within a group, when sslproxy_cert_adapt acl(s) match, Squid uses the # corresponding adaptation algorithm to generate the certificate and # ignores all subsequent sslproxy_cert_adapt options in that algorithm's # group (i.e., the first match wins within each algorithm group). If no # acl(s) match, the default mimicking action takes place. # # WARNING: SQUID_X509_V_ERR_DOMAIN_MISMATCH and ssl:certDomainMismatch can # be used with sslproxy_cert_adapt, but if and only if Squid is bumping a # CONNECT request that carries a domain name. In all other cases (CONNECT # to an IP address or an intercepted SSL connection), Squid cannot detect # the domain mismatch at certificate generation time when # bump-server-first is used. #Default: # none # TAG: sslpassword_program # Specify a program used for entering SSL key passphrases # when using encrypted SSL certificate keys. If not specified # keys must either be unencrypted, or Squid started with the -N # option to allow it to query interactively for the passphrase. # # The key file name is given as argument to the program allowing # selection of the right password if you have multiple encrypted # keys. #Default: # none # OPTIONS RELATING TO EXTERNAL SSL_CRTD # ----------------------------------------------------------------------------- # TAG: sslcrtd_program # Note: This option is only available if Squid is rebuilt with the # --enable-ssl-crtd # # Specify the location and options of the executable for certificate # generator. # # /opt/local/libexec/squid/security_file_certgen program can use a disk cache to improve response # times on repeated requests. To enable caching, specify -s and -M # parameters. If those parameters are not given, the program generates # a new certificate on every request. # # For more information use: # /opt/local/libexec/squid/security_file_certgen -h #Default: # sslcrtd_program /opt/local/libexec/squid/security_file_certgen -s /opt/local/var/squid/cache/ssl_db -M 4MB # TAG: sslcrtd_children # Note: This option is only available if Squid is rebuilt with the # --enable-ssl-crtd # # Specifies the maximum number of certificate generation processes that # Squid may spawn (numberofchildren) and several related options. Using # too few of these helper processes (a.k.a. "helpers") creates request # queues. Using too many helpers wastes your system resources. Squid # does not support spawning more than 32 helpers. # # Usage: numberofchildren [option]... # # The startup= and idle= options allow some measure of skew in your # tuning. # # startup=N # # Sets the minimum number of processes to spawn when Squid # starts or reconfigures. When set to zero the first request will # cause spawning of the first child process to handle it. # # Starting too few children temporary slows Squid under load while it # tries to spawn enough additional processes to cope with traffic. # # idle=N # # Sets a minimum of how many processes Squid is to try and keep available # at all times. When traffic begins to rise above what the existing # processes can handle this many more will be spawned up to the maximum # configured. A minimum setting of 1 is required. # # queue-size=N # # Sets the maximum number of queued requests. A request is queued when # no existing child is idle and no new child can be started due to # numberofchildren limit. If the queued requests exceed queue size for # more than 3 minutes squid aborts its operation. The default value is # set to 2*numberofchildren. # # You must have at least one ssl_crtd process. #Default: # sslcrtd_children 32 startup=5 idle=1 # TAG: sslcrtvalidator_program # Specify the location and options of the executable for ssl_crt_validator # process. # # Usage: sslcrtvalidator_program [ttl=n] [cache=n] path ... # # Options: # ttl=n TTL in seconds for cached results. The default is 60 secs # cache=n limit the result cache size. The default value is 2048 #Default: # none # TAG: sslcrtvalidator_children # Specifies the maximum number of certificate validation processes that # Squid may spawn (numberofchildren) and several related options. Using # too few of these helper processes (a.k.a. "helpers") creates request # queues. Using too many helpers wastes your system resources. Squid # does not support spawning more than 32 helpers. # # Usage: numberofchildren [option]... # # The startup= and idle= options allow some measure of skew in your # tuning. # # startup=N # # Sets the minimum number of processes to spawn when Squid # starts or reconfigures. When set to zero the first request will # cause spawning of the first child process to handle it. # # Starting too few children temporary slows Squid under load while it # tries to spawn enough additional processes to cope with traffic. # # idle=N # # Sets a minimum of how many processes Squid is to try and keep available # at all times. When traffic begins to rise above what the existing # processes can handle this many more will be spawned up to the maximum # configured. A minimum setting of 1 is required. # # concurrency= # # The number of requests each certificate validator helper can handle in # parallel. A value of 0 indicates the certficate validator does not # support concurrency. Defaults to 1. # # When this directive is set to a value >= 1 then the protocol # used to communicate with the helper is modified to include # a request ID in front of the request/response. The request # ID from the request must be echoed back with the response # to that request. # # queue-size=N # # Sets the maximum number of queued requests. A request is queued when # no existing child can accept it due to concurrency limit and no new # child can be started due to numberofchildren limit. If the queued # requests exceed queue size for more than 3 minutes squid aborts its # operation. The default value is set to 2*numberofchildren. # # You must have at least one ssl_crt_validator process. #Default: # sslcrtvalidator_children 32 startup=5 idle=1 concurrency=1 # OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM # ----------------------------------------------------------------------------- # TAG: cache_peer # To specify other caches in a hierarchy, use the format: # # cache_peer hostname type http-port icp-port [options] # # For example, # # # proxy icp # # hostname type port port options # # -------------------- -------- ----- ----- ----------- # cache_peer parent.foo.net parent 3128 3130 default # cache_peer sib1.foo.net sibling 3128 3130 proxy-only # cache_peer sib2.foo.net sibling 3128 3130 proxy-only # cache_peer example.com parent 80 0 default # cache_peer cdn.example.com sibling 3128 0 # # type: either 'parent', 'sibling', or 'multicast'. # # proxy-port: The port number where the peer accept HTTP requests. # For other Squid proxies this is usually 3128 # For web servers this is usually 80 # # icp-port: Used for querying neighbor caches about objects. # Set to 0 if the peer does not support ICP or HTCP. # See ICP and HTCP options below for additional details. # # # ==== ICP OPTIONS ==== # # You MUST also set icp_port and icp_access explicitly when using these options. # The defaults will prevent peer traffic using ICP. # # # no-query Disable ICP queries to this neighbor. # # multicast-responder # Indicates the named peer is a member of a multicast group. # ICP queries will not be sent directly to the peer, but ICP # replies will be accepted from it. # # closest-only Indicates that, for ICP_OP_MISS replies, we'll only forward # CLOSEST_PARENT_MISSes and never FIRST_PARENT_MISSes. # # background-ping # To only send ICP queries to this neighbor infrequently. # This is used to keep the neighbor round trip time updated # and is usually used in conjunction with weighted-round-robin. # # # ==== HTCP OPTIONS ==== # # You MUST also set htcp_port and htcp_access explicitly when using these options. # The defaults will prevent peer traffic using HTCP. # # # htcp Send HTCP, instead of ICP, queries to the neighbor. # You probably also want to set the "icp-port" to 4827 # instead of 3130. This directive accepts a comma separated # list of options described below. # # htcp=oldsquid Send HTCP to old Squid versions (2.5 or earlier). # # htcp=no-clr Send HTCP to the neighbor but without # sending any CLR requests. This cannot be used with # only-clr. # # htcp=only-clr Send HTCP to the neighbor but ONLY CLR requests. # This cannot be used with no-clr. # # htcp=no-purge-clr # Send HTCP to the neighbor including CLRs but only when # they do not result from PURGE requests. # # htcp=forward-clr # Forward any HTCP CLR requests this proxy receives to the peer. # # # ==== PEER SELECTION METHODS ==== # # The default peer selection method is ICP, with the first responding peer # being used as source. These options can be used for better load balancing. # # # default This is a parent cache which can be used as a "last-resort" # if a peer cannot be located by any of the peer-selection methods. # If specified more than once, only the first is used. # # round-robin Load-Balance parents which should be used in a round-robin # fashion in the absence of any ICP queries. # weight=N can be used to add bias. # # weighted-round-robin # Load-Balance parents which should be used in a round-robin # fashion with the frequency of each parent being based on the # round trip time. Closer parents are used more often. # Usually used for background-ping parents. # weight=N can be used to add bias. # # carp Load-Balance parents which should be used as a CARP array. # The requests will be distributed among the parents based on the # CARP load balancing hash function based on their weight. # # userhash Load-balance parents based on the client proxy_auth or ident username. # # sourcehash Load-balance parents based on the client source IP. # # multicast-siblings # To be used only for cache peers of type "multicast". # ALL members of this multicast group have "sibling" # relationship with it, not "parent". This is to a multicast # group when the requested object would be fetched only from # a "parent" cache, anyway. It's useful, e.g., when # configuring a pool of redundant Squid proxies, being # members of the same multicast group. # # # ==== PEER SELECTION OPTIONS ==== # # weight=N use to affect the selection of a peer during any weighted # peer-selection mechanisms. # The weight must be an integer; default is 1, # larger weights are favored more. # This option does not affect parent selection if a peering # protocol is not in use. # # basetime=N Specify a base amount to be subtracted from round trip # times of parents. # It is subtracted before division by weight in calculating # which parent to fectch from. If the rtt is less than the # base time the rtt is set to a minimal value. # # ttl=N Specify a TTL to use when sending multicast ICP queries # to this address. # Only useful when sending to a multicast group. # Because we don't accept ICP replies from random # hosts, you must configure other group members as # peers with the 'multicast-responder' option. # # no-delay To prevent access to this neighbor from influencing the # delay pools. # # digest-url=URL Tell Squid to fetch the cache digest (if digests are # enabled) for this host from the specified URL rather # than the Squid default location. # # # ==== CARP OPTIONS ==== # # carp-key=key-specification # use a different key than the full URL to hash against the peer. # the key-specification is a comma-separated list of the keywords # scheme, host, port, path, params # Order is not important. # # ==== ACCELERATOR / REVERSE-PROXY OPTIONS ==== # # originserver Causes this parent to be contacted as an origin server. # Meant to be used in accelerator setups when the peer # is a web server. # # forceddomain=name # Set the Host header of requests forwarded to this peer. # Useful in accelerator setups where the server (peer) # expects a certain domain name but clients may request # others. ie example.com or www.example.com # # no-digest Disable request of cache digests. # # no-netdb-exchange # Disables requesting ICMP RTT database (NetDB). # # # ==== AUTHENTICATION OPTIONS ==== # # login=user:password # If this is a personal/workgroup proxy and your parent # requires proxy authentication. # # Note: The string can include URL escapes (i.e. %20 for # spaces). This also means % must be written as %%. # # login=PASSTHRU # Send login details received from client to this peer. # Both Proxy- and WWW-Authorization headers are passed # without alteration to the peer. # Authentication is not required by Squid for this to work. # # Note: This will pass any form of authentication but # only Basic auth will work through a proxy unless the # connection-auth options are also used. # # login=PASS Send login details received from client to this peer. # Authentication is not required by this option. # # If there are no client-provided authentication headers # to pass on, but username and password are available # from an external ACL user= and password= result tags # they may be sent instead. # # Note: To combine this with proxy_auth both proxies must # share the same user database as HTTP only allows for # a single login (one for proxy, one for origin server). # Also be warned this will expose your users proxy # password to the peer. USE WITH CAUTION # # login=*:password # Send the username to the upstream cache, but with a # fixed password. This is meant to be used when the peer # is in another administrative domain, but it is still # needed to identify each user. # The star can optionally be followed by some extra # information which is added to the username. This can # be used to identify this proxy to the peer, similar to # the login=username:password option above. # # login=NEGOTIATE # If this is a personal/workgroup proxy and your parent # requires a secure proxy authentication. # The first principal from the default keytab or defined by # the environment variable KRB5_KTNAME will be used. # # WARNING: The connection may transmit requests from multiple # clients. Negotiate often assumes end-to-end authentication # and a single-client. Which is not strictly true here. # # login=NEGOTIATE:principal_name # If this is a personal/workgroup proxy and your parent # requires a secure proxy authentication. # The principal principal_name from the default keytab or # defined by the environment variable KRB5_KTNAME will be # used. # # WARNING: The connection may transmit requests from multiple # clients. Negotiate often assumes end-to-end authentication # and a single-client. Which is not strictly true here. # # connection-auth=on|off # Tell Squid that this peer does or not support Microsoft # connection oriented authentication, and any such # challenges received from there should be ignored. # Default is auto to automatically determine the status # of the peer. # # auth-no-keytab # Do not use a keytab to authenticate to a peer when # login=NEGOTIATE is specified. Let the GSSAPI # implementation determine which already existing # credentials cache to use instead. # # # ==== SSL / HTTPS / TLS OPTIONS ==== # # tls Encrypt connections to this peer with TLS. # # sslcert=/path/to/ssl/certificate # A client X.509 certificate to use when connecting to # this peer. # # sslkey=/path/to/ssl/key # The private key corresponding to sslcert above. # # If sslkey= is not specified sslcert= is assumed to # reference a PEM file containing both the certificate # and private key. # # sslcipher=... The list of valid SSL ciphers to use when connecting # to this peer. # # tls-min-version=1.N # The minimum TLS protocol version to permit. To control # SSLv3 use the tls-options= parameter. # Supported Values: 1.0 (default), 1.1, 1.2 # # tls-options=... Specify various TLS implementation options. # # OpenSSL options most important are: # # NO_SSLv3 Disallow the use of SSLv3 # # SINGLE_DH_USE # Always create a new key when using # temporary/ephemeral DH key exchanges # # NO_TICKET # Disable use of RFC5077 session tickets. # Some servers may have problems # understanding the TLS extension due # to ambiguous specification in RFC4507. # # ALL Enable various bug workarounds # suggested as "harmless" by OpenSSL # Be warned that this reduces SSL/TLS # strength to some attacks. # # See the OpenSSL SSL_CTX_set_options documentation for a # more complete list. # # GnuTLS options most important are: # # %NO_TICKETS # Disable use of RFC5077 session tickets. # Some servers may have problems # understanding the TLS extension due # to ambiguous specification in RFC4507. # # See the GnuTLS Priority Strings documentation # for a more complete list. # http://www.gnutls.org/manual/gnutls.html#Priority-Strings # # tls-cafile= PEM file containing CA certificates to use when verifying # the peer certificate. May be repeated to load multiple files. # # sslcapath=... A directory containing additional CA certificates to # use when verifying the peer certificate. # Requires OpenSSL or LibreSSL. # # sslcrlfile=... A certificate revocation list file to use when # verifying the peer certificate. # # sslflags=... Specify various flags modifying the SSL implementation: # # DONT_VERIFY_PEER # Accept certificates even if they fail to # verify. # # DONT_VERIFY_DOMAIN # Don't verify the peer certificate # matches the server name # # ssldomain= The peer name as advertised in it's certificate. # Used for verifying the correctness of the received peer # certificate. If not specified the peer hostname will be # used. # # front-end-https[=off|on|auto] # Enable the "Front-End-Https: On" header needed when # using Squid as a SSL frontend in front of Microsoft OWA. # See MS KB document Q307347 for details on this header. # If set to auto the header will only be added if the # request is forwarded as a https:// URL. # # tls-default-ca[=off] # Whether to use the system Trusted CAs. Default is ON. # # tls-no-npn Do not use the TLS NPN extension to advertise HTTP/1.1. # # ==== GENERAL OPTIONS ==== # # connect-timeout=N # A peer-specific connect timeout. # Also see the peer_connect_timeout directive. # # connect-fail-limit=N # How many times connecting to a peer must fail before # it is marked as down. Standby connection failures # count towards this limit. Default is 10. # # allow-miss Disable Squid's use of only-if-cached when forwarding # requests to siblings. This is primarily useful when # icp_hit_stale is used by the sibling. Excessive use # of this option may result in forwarding loops. One way # to prevent peering loops when using this option, is to # deny cache peer usage on requests from a peer: # acl fromPeer ... # cache_peer_access peerName deny fromPeer # # max-conn=N Limit the number of concurrent connections the Squid # may open to this peer, including already opened idle # and standby connections. There is no peer-specific # connection limit by default. # # A peer exceeding the limit is not used for new # requests unless a standby connection is available. # # max-conn currently works poorly with idle persistent # connections: When a peer reaches its max-conn limit, # and there are idle persistent connections to the peer, # the peer may not be selected because the limiting code # does not know whether Squid can reuse those idle # connections. # # standby=N Maintain a pool of N "hot standby" connections to an # UP peer, available for requests when no idle # persistent connection is available (or safe) to use. # By default and with zero N, no such pool is maintained. # N must not exceed the max-conn limit (if any). # # At start or after reconfiguration, Squid opens new TCP # standby connections until there are N connections # available and then replenishes the standby pool as # opened connections are used up for requests. A used # connection never goes back to the standby pool, but # may go to the regular idle persistent connection pool # shared by all peers and origin servers. # # Squid never opens multiple new standby connections # concurrently. This one-at-a-time approach minimizes # flooding-like effect on peers. Furthermore, just a few # standby connections should be sufficient in most cases # to supply most new requests with a ready-to-use # connection. # # Standby connections obey server_idle_pconn_timeout. # For the feature to work as intended, the peer must be # configured to accept and keep them open longer than # the idle timeout at the connecting Squid, to minimize # race conditions typical to idle used persistent # connections. Default request_timeout and # server_idle_pconn_timeout values ensure such a # configuration. # # name=xxx Unique name for the peer. # Required if you have multiple peers on the same host # but different ports. # This name can be used in cache_peer_access and similar # directives to identify the peer. # Can be used by outgoing access controls through the # peername ACL type. # # no-tproxy Do not use the client-spoof TPROXY support when forwarding # requests to this peer. Use normal address selection instead. # This overrides the spoof_client_ip ACL. # # proxy-only objects fetched from the peer will not be stored locally. # #Default: # none # See http://www.privoxy.org/user-manual/config.html # Define Privoxy as parent proxy (without ICP) cache_peer 127.0.0.1 parent 8118 0 no-digest no-query default name=privoxy # If privoxy is run on the LAN: #cache_peer 10.0.1.3 parent 8118 0 no-digest no-query default name=privoxy # I2P # cache_peer 127.0.0.1 parent 4443 0 no-digest no-query default name=i2p # TAG: cache_peer_access # Restricts usage of cache_peer proxies. # # Usage: # cache_peer_access peer-name allow|deny [!]aclname ... # # For the required peer-name parameter, use either the value of the # cache_peer name=value parameter or, if name=value is missing, the # cache_peer hostname parameter. # # This directive narrows down the selection of peering candidates, but # does not determine the order in which the selected candidates are # contacted. That order is determined by the peer selection algorithms # (see PEER SELECTION sections in the cache_peer documentation). # # If a deny rule matches, the corresponding peer will not be contacted # for the current transaction -- Squid will not send ICP queries and # will not forward HTTP requests to that peer. An allow match leaves # the corresponding peer in the selection. The first match for a given # peer wins for that peer. # # The relative order of cache_peer_access directives for the same peer # matters. The relative order of any two cache_peer_access directives # for different peers does not matter. To ease interpretation, it is a # good idea to group cache_peer_access directives for the same peer # together. # # A single cache_peer_access directive may be evaluated multiple times # for a given transaction because individual peer selection algorithms # may check it independently from each other. These redundant checks # may be optimized away in future Squid versions. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # #Default: # No peer usage restrictions. # I2P # acl i2p dstdomain -n .i2p # cache_peer_access i2p allow i2p # cache_peer_access i2p deny all # TAG: neighbor_type_domain # Modify the cache_peer neighbor type when passing requests # about specific domains to the peer. # # Usage: # neighbor_type_domain neighbor parent|sibling domain domain ... # # For example: # cache_peer foo.example.com parent 3128 3130 # neighbor_type_domain foo.example.com sibling .au .de # # The above configuration treats all requests to foo.example.com as a # parent proxy unless the request is for a .au or .de ccTLD domain name. #Default: # The peer type from cache_peer directive is used for all requests to that peer. # TAG: dead_peer_timeout (seconds) # This controls how long Squid waits to declare a peer cache # as "dead." If there are no ICP replies received in this # amount of time, Squid will declare the peer dead and not # expect to receive any further ICP replies. However, it # continues to send ICP queries, and will mark the peer as # alive upon receipt of the first subsequent ICP reply. # # This timeout also affects when Squid expects to receive ICP # replies from peers. If more than 'dead_peer' seconds have # passed since the last ICP reply was received, Squid will not # expect to receive an ICP reply on the next query. Thus, if # your time between requests is greater than this timeout, you # will see a lot of requests sent DIRECT to origin servers # instead of to your parents. #Default: # dead_peer_timeout 10 seconds # TAG: forward_max_tries # Limits the number of attempts to forward the request. # # For the purpose of this limit, Squid counts all high-level request # forwarding attempts, including any same-destination retries after # certain persistent connection failures and any attempts to use a # different peer. However, low-level connection reopening attempts # (enabled using connect_retries) are not counted. # # See also: forward_timeout and connect_retries. #Default: # forward_max_tries 25 # MEMORY CACHE OPTIONS # ----------------------------------------------------------------------------- # TAG: cache_mem (bytes) # NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS SIZE. # IT ONLY PLACES A LIMIT ON HOW MUCH ADDITIONAL MEMORY SQUID WILL # USE AS A MEMORY CACHE OF OBJECTS. SQUID USES MEMORY FOR OTHER # THINGS AS WELL. SEE THE SQUID FAQ SECTION 8 FOR DETAILS. # # 'cache_mem' specifies the ideal amount of memory to be used # for: # * In-Transit objects # * Hot Objects # * Negative-Cached objects # # Data for these objects are stored in 4 KB blocks. This # parameter specifies the ideal upper limit on the total size of # 4 KB blocks allocated. In-Transit objects take the highest # priority. # # In-transit objects have priority over the others. When # additional space is needed for incoming data, negative-cached # and hot objects will be released. In other words, the # negative-cached and hot objects will fill up any unused space # not needed for in-transit objects. # # If circumstances require, this limit will be exceeded. # Specifically, if your incoming request rate requires more than # 'cache_mem' of memory to hold in-transit objects, Squid will # exceed this limit to satisfy the new requests. When the load # decreases, blocks will be freed until the high-water mark is # reached. Thereafter, blocks will be used to store hot # objects. # # If shared memory caching is enabled, Squid does not use the shared # cache space for in-transit objects, but they still consume as much # local memory as they need. For more details about the shared memory # cache, see memory_cache_shared. #Default: # cache_mem 256 MB # TAG: maximum_object_size_in_memory (bytes) # Objects greater than this size will not be attempted to kept in # the memory cache. This should be set high enough to keep objects # accessed frequently in memory to improve performance whilst low # enough to keep larger objects from hoarding cache_mem. #Default: # maximum_object_size_in_memory 512 KB maximum_object_size_in_memory 64 KB # TAG: memory_cache_shared on|off # Controls whether the memory cache is shared among SMP workers. # # The shared memory cache is meant to occupy cache_mem bytes and replace # the non-shared memory cache, although some entities may still be # cached locally by workers for now (e.g., internal and in-transit # objects may be served from a local memory cache even if shared memory # caching is enabled). # # By default, the memory cache is shared if and only if all of the # following conditions are satisfied: Squid runs in SMP mode with # multiple workers, cache_mem is positive, and Squid environment # supports required IPC primitives (e.g., POSIX shared memory segments # and GCC-style atomic operations). # # To avoid blocking locks, shared memory uses opportunistic algorithms # that do not guarantee that every cachable entity that could have been # shared among SMP workers will actually be shared. #Default: # "on" where supported if doing memory caching with multiple SMP workers. # TAG: memory_cache_mode # Controls which objects to keep in the memory cache (cache_mem) # # always Keep most recently fetched objects in memory (default) # # disk Only disk cache hits are kept in memory, which means # an object must first be cached on disk and then hit # a second time before cached in memory. # # network Only objects fetched from network is kept in memory #Default: # Keep the most recently fetched objects in memory # TAG: memory_replacement_policy # The memory replacement policy parameter determines which # objects are purged from memory when memory space is needed. # # See cache_replacement_policy for details on algorithms. #Default: # memory_replacement_policy lru # DISK CACHE OPTIONS # ----------------------------------------------------------------------------- # TAG: cache_replacement_policy # The cache replacement policy parameter determines which # objects are evicted (replaced) when disk space is needed. # # lru : Squid's original list based LRU policy # heap GDSF : Greedy-Dual Size Frequency # heap LFUDA: Least Frequently Used with Dynamic Aging # heap LRU : LRU policy implemented using a heap # # Applies to any cache_dir lines listed below this directive. # # The LRU policies keeps recently referenced objects. # # The heap GDSF policy optimizes object hit rate by keeping smaller # popular objects in cache so it has a better chance of getting a # hit. It achieves a lower byte hit rate than LFUDA though since # it evicts larger (possibly popular) objects. # # The heap LFUDA policy keeps popular objects in cache regardless of # their size and thus optimizes byte hit rate at the expense of # hit rate since one large, popular object will prevent many # smaller, slightly less popular objects from being cached. # # Both policies utilize a dynamic aging mechanism that prevents # cache pollution that can otherwise occur with frequency-based # replacement policies. # # NOTE: if using the LFUDA replacement policy you should increase # the value of maximum_object_size above its default of 4 MB to # to maximize the potential byte hit rate improvement of LFUDA. # # For more information about the GDSF and LFUDA cache replacement # policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html # and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html. #Default: # cache_replacement_policy lru cache_replacement_policy heap LFUDA # TAG: minimum_object_size (bytes) # Objects smaller than this size will NOT be saved on disk. The # value is specified in bytes, and the default is 0 KB, which # means all responses can be stored. #Default: # no limit # TAG: maximum_object_size (bytes) # Set the default value for max-size parameter on any cache_dir. # The value is specified in bytes, and the default is 4 MB. # # If you wish to get a high BYTES hit ratio, you should probably # increase this (one 32 MB object hit counts for 3200 10KB # hits). # # If you wish to increase hit ratio more than you want to # save bandwidth you should leave this low. # # NOTE: if using the LFUDA replacement policy you should increase # this value to maximize the byte hit rate improvement of LFUDA! # See cache_replacement_policy for a discussion of this policy. #Default: # maximum_object_size 4 MB maximum_object_size 64 MB # TAG: cache_dir # Format: # cache_dir Type Directory-Name Fs-specific-data [options] # # You can specify multiple cache_dir lines to spread the # cache among different disk partitions. # # Type specifies the kind of storage system to use. Only "ufs" # is built by default. To enable any of the other storage systems # see the --enable-storeio configure option. # # 'Directory' is a top-level directory where cache swap # files will be stored. If you want to use an entire disk # for caching, this can be the mount-point directory. # The directory must exist and be writable by the Squid # process. Squid will NOT create this directory for you. # # In SMP configurations, cache_dir must not precede the workers option # and should use configuration macros or conditionals to give each # worker interested in disk caching a dedicated cache directory. # # # ==== The ufs store type ==== # # "ufs" is the old well-known Squid storage format that has always # been there. # # Usage: # cache_dir ufs Directory-Name Mbytes L1 L2 [options] # # 'Mbytes' is the amount of disk space (MB) to use under this # directory. The default is 100 MB. Change this to suit your # configuration. Do NOT put the size of your disk drive here. # Instead, if you want Squid to use the entire disk drive, # subtract 20% and use that value. # # 'L1' is the number of first-level subdirectories which # will be created under the 'Directory'. The default is 16. # # 'L2' is the number of second-level subdirectories which # will be created under each first-level directory. The default # is 256. # # # ==== The aufs store type ==== # # "aufs" uses the same storage format as "ufs", utilizing # POSIX-threads to avoid blocking the main Squid process on # disk-I/O. This was formerly known in Squid as async-io. # # Usage: # cache_dir aufs Directory-Name Mbytes L1 L2 [options] # # see argument descriptions under ufs above # # # ==== The diskd store type ==== # # "diskd" uses the same storage format as "ufs", utilizing a # separate process to avoid blocking the main Squid process on # disk-I/O. # # Usage: # cache_dir diskd Directory-Name Mbytes L1 L2 [options] [Q1=n] [Q2=n] # # see argument descriptions under ufs above # # Q1 specifies the number of unacknowledged I/O requests when Squid # stops opening new files. If this many messages are in the queues, # Squid won't open new files. Default is 64 # # Q2 specifies the number of unacknowledged messages when Squid # starts blocking. If this many messages are in the queues, # Squid blocks until it receives some replies. Default is 72 # # When Q1 < Q2 (the default), the cache directory is optimized # for lower response time at the expense of a decrease in hit # ratio. If Q1 > Q2, the cache directory is optimized for # higher hit ratio at the expense of an increase in response # time. # # # ==== The rock store type ==== # # Usage: # cache_dir rock Directory-Name Mbytes [options] # # The Rock Store type is a database-style storage. All cached # entries are stored in a "database" file, using fixed-size slots. # A single entry occupies one or more slots. # # If possible, Squid using Rock Store creates a dedicated kid # process called "disker" to avoid blocking Squid worker(s) on disk # I/O. One disker kid is created for each rock cache_dir. Diskers # are created only when Squid, running in daemon mode, has support # for the IpcIo disk I/O module. # # swap-timeout=msec: Squid will not start writing a miss to or # reading a hit from disk if it estimates that the swap operation # will take more than the specified number of milliseconds. By # default and when set to zero, disables the disk I/O time limit # enforcement. Ignored when using blocking I/O module because # blocking synchronous I/O does not allow Squid to estimate the # expected swap wait time. # # max-swap-rate=swaps/sec: Artificially limits disk access using # the specified I/O rate limit. Swap out requests that # would cause the average I/O rate to exceed the limit are # delayed. Individual swap in requests (i.e., hits or reads) are # not delayed, but they do contribute to measured swap rate and # since they are placed in the same FIFO queue as swap out # requests, they may wait longer if max-swap-rate is smaller. # This is necessary on file systems that buffer "too # many" writes and then start blocking Squid and other processes # while committing those writes to disk. Usually used together # with swap-timeout to avoid excessive delays and queue overflows # when disk demand exceeds available disk "bandwidth". By default # and when set to zero, disables the disk I/O rate limit # enforcement. Currently supported by IpcIo module only. # # slot-size=bytes: The size of a database "record" used for # storing cached responses. A cached response occupies at least # one slot and all database I/O is done using individual slots so # increasing this parameter leads to more disk space waste while # decreasing it leads to more disk I/O overheads. Should be a # multiple of your operating system I/O page size. Defaults to # 16KBytes. A housekeeping header is stored with each slot and # smaller slot-sizes will be rejected. The header is smaller than # 100 bytes. # # # ==== COMMON OPTIONS ==== # # no-store no new objects should be stored to this cache_dir. # # min-size=n the minimum object size in bytes this cache_dir # will accept. It's used to restrict a cache_dir # to only store large objects (e.g. AUFS) while # other stores are optimized for smaller objects # (e.g. Rock). # Defaults to 0. # # max-size=n the maximum object size in bytes this cache_dir # supports. # The value in maximum_object_size directive sets # the default unless more specific details are # available (ie a small store capacity). # # Note: To make optimal use of the max-size limits you should order # the cache_dir lines with the smallest max-size value first. # #Default: # No disk cache. Store cache ojects only in memory. # cache_dir ufs /opt/local/var/squid/cache 256 16 256 # Uncomment and adjust the following to add a disk cache directory. #cache_dir ufs /opt/local/var/squid/cache 100 16 256 # TAG: store_dir_select_algorithm # How Squid selects which cache_dir to use when the response # object will fit into more than one. # # Regardless of which algorithm is used the cache_dir min-size # and max-size parameters are obeyed. As such they can affect # the selection algorithm by limiting the set of considered # cache_dir. # # Algorithms: # # least-load # # This algorithm is suited to caches with similar cache_dir # sizes and disk speeds. # # The disk with the least I/O pending is selected. # When there are multiple disks with the same I/O load ranking # the cache_dir with most available capacity is selected. # # When a mix of cache_dir sizes are configured the faster disks # have a naturally lower I/O loading and larger disks have more # capacity. So space used to store objects and data throughput # may be very unbalanced towards larger disks. # # # round-robin # # This algorithm is suited to caches with unequal cache_dir # disk sizes. # # Each cache_dir is selected in a rotation. The next suitable # cache_dir is used. # # Available cache_dir capacity is only considered in relation # to whether the object will fit and meets the min-size and # max-size parameters. # # Disk I/O loading is only considered to prevent overload on slow # disks. This algorithm does not spread objects by size, so any # I/O loading per-disk may appear very unbalanced and volatile. # # If several cache_dirs use similar min-size, max-size, or other # limits to to reject certain responses, then do not group such # cache_dir lines together, to avoid round-robin selection bias # towards the first cache_dir after the group. Instead, interleave # cache_dir lines from different groups. For example: # # store_dir_select_algorithm round-robin # cache_dir rock /hdd1 ... min-size=100000 # cache_dir rock /ssd1 ... max-size=99999 # cache_dir rock /hdd2 ... min-size=100000 # cache_dir rock /ssd2 ... max-size=99999 # cache_dir rock /hdd3 ... min-size=100000 # cache_dir rock /ssd3 ... max-size=99999 #Default: # store_dir_select_algorithm least-load # TAG: max_open_disk_fds # To avoid having disk as the I/O bottleneck Squid can optionally # bypass the on-disk cache if more than this amount of disk file # descriptors are open. # # A value of 0 indicates no limit. #Default: # no limit # TAG: cache_swap_low (percent, 0-100) # The low-water mark for AUFS/UFS/diskd cache object eviction by # the cache_replacement_policy algorithm. # # Removal begins when the swap (disk) usage of a cache_dir is # above this low-water mark and attempts to maintain utilization # near the low-water mark. # # As swap utilization increases towards the high-water mark set # by cache_swap_high object eviction becomes more agressive. # # The value difference in percentages between low- and high-water # marks represent an eviction rate of 300 objects per second and # the rate continues to scale in agressiveness by multiples of # this above the high-water mark. # # Defaults are 90% and 95%. If you have a large cache, 5% could be # hundreds of MB. If this is the case you may wish to set these # numbers closer together. # # See also cache_swap_high and cache_replacement_policy #Default: # cache_swap_low 90 # TAG: cache_swap_high (percent, 0-100) # The high-water mark for AUFS/UFS/diskd cache object eviction by # the cache_replacement_policy algorithm. # # Removal begins when the swap (disk) usage of a cache_dir is # above the low-water mark set by cache_swap_low and attempts to # maintain utilization near the low-water mark. # # As swap utilization increases towards this high-water mark object # eviction becomes more agressive. # # The value difference in percentages between low- and high-water # marks represent an eviction rate of 300 objects per second and # the rate continues to scale in agressiveness by multiples of # this above the high-water mark. # # Defaults are 90% and 95%. If you have a large cache, 5% could be # hundreds of MB. If this is the case you may wish to set these # numbers closer together. # # See also cache_swap_low and cache_replacement_policy #Default: # cache_swap_high 95 # LOGFILE OPTIONS # ----------------------------------------------------------------------------- # TAG: logformat # Usage: # # logformat # # Defines an access log format. # # The is a string with embedded % format codes # # % format codes all follow the same basic structure where all # components but the formatcode are optional and usually unnecessary, # especially when dealing with common codes. # # % [encoding] [-] [[0]width] [{arg}] formatcode [{arg}] # # encoding escapes or otherwise protects "special" characters: # # " Quoted string encoding where quote(") and # backslash(\) characters are \-escaped while # CR, LF, and TAB characters are encoded as \r, # \n, and \t two-character sequences. # # [ Custom Squid encoding where percent(%), square # brackets([]), backslash(\) and characters with # codes outside of [32,126] range are %-encoded. # SP is not encoded. Used by log_mime_hdrs. # # # URL encoding (a.k.a. percent-encoding) where # all URL unsafe and control characters (per RFC # 1738) are %-encoded. # # / Shell-like encoding where quote(") and # backslash(\) characters are \-escaped while CR # and LF characters are encoded as \r and \n # two-character sequences. Values containing SP # character(s) are surrounded by quotes("). # # ' Raw/as-is encoding with no escaping/quoting. # # Default encoding: When no explicit encoding is # specified, each %code determines its own encoding. # Most %codes use raw/as-is encoding, but some codes use # a so called "pass-through URL encoding" where all URL # unsafe and control characters (per RFC 1738) are # %-encoded, but the percent character(%) is left as is. # # - left aligned # # width minimum and/or maximum field width: # [width_min][.width_max] # When minimum starts with 0, the field is zero-padded. # String values exceeding maximum width are truncated. # # {arg} argument such as header name etc. This field may be # placed before or after the token, but not both at once. # # Format codes: # # % a literal % character # sn Unique sequence number per log line entry # err_code The ID of an error response served by Squid or # a similar internal error identifier. # err_detail Additional err_code-dependent error information. # note The annotation specified by the argument. Also # logs the adaptation meta headers set by the # adaptation_meta configuration parameter. # If no argument given all annotations logged. # The argument may include a separator to use with # annotation values: # name[:separator] # By default, multiple note values are separated with "," # and multiple notes are separated with "\r\n". # When logging named notes with %{name}note, the # explicitly configured separator is used between note # values. When logging all notes with %note, the # explicitly configured separator is used between # individual notes. There is currently no way to # specify both value and notes separators when logging # all notes with %note. # # Connection related format codes: # # >a Client source IP address # >A Client FQDN # >p Client source port # >eui Client source EUI (MAC address, EUI-48 or EUI-64 identifier) # >la Local IP address the client connected to # >lp Local port number the client connected to # >qos Client connection TOS/DSCP value set by Squid # >nfmark Client connection netfilter mark set by Squid # # la Local listening IP address the client connection was connected to. # lp Local listening port number the client connection was connected to. # # handshake Raw client handshake # Initial client bytes received by Squid on a newly # accepted TCP connection or inside a just established # CONNECT tunnel. Squid stops accumulating handshake # bytes as soon as the handshake parser succeeds or # fails (determining whether the client is using the # expected protocol). # # For HTTP clients, the handshake is the request line. # For TLS clients, the handshake consists of all TLS # records up to and including the TLS record that # contains the last byte of the first ClientHello # message. For clients using an unsupported protocol, # this field contains the bytes received by Squid at the # time of the handshake parsing failure. # # See the on_unsupported_protocol directive for more # information on Squid handshake traffic expectations. # # Current support is limited to these contexts: # - http_port connections, but only when the # on_unsupported_protocol directive is in use. # - https_port connections (and CONNECT tunnels) that # are subject to the ssl_bump peek or stare action. # # To protect binary handshake data, this field is always # base64-encoded (RFC 4648 Section 4). If logformat # field encoding is configured, that encoding is applied # on top of base64. Otherwise, the computed base64 value # is recorded as is. # # Time related format codes: # # ts Seconds since epoch # tu subsecond time (milliseconds) # tl Local time. Optional strftime format argument # default %d/%b/%Y:%H:%M:%S %z # tg GMT time. Optional strftime format argument # default %d/%b/%Y:%H:%M:%S %z # tr Response time (milliseconds) # dt Total time spent making DNS lookups (milliseconds) # tS Approximate master transaction start time in # . format. # Currently, Squid considers the master transaction # started when a complete HTTP request header initiating # the transaction is received from the client. This is # the same value that Squid uses to calculate transaction # response time when logging %tr to access.log. Currently, # Squid uses millisecond resolution for %tS values, # similar to the default access.log "current time" field # (%ts.%03tu). # # Access Control related format codes: # # et Tag returned by external acl # ea Log string returned by external acl # un User name (any available) # ul User name from authentication # ue User name from external acl helper # ui User name from ident # un A user name. Expands to the first available name # from the following list of information sources: # - authenticated user name, like %ul # - user name supplied by an external ACL, like %ue # - SSL client name, like %us # - ident user name, like %ui # credentials Client credentials. The exact meaning depends on # the authentication scheme: For Basic authentication, # it is the password; for Digest, the realm sent by the # client; for NTLM and Negotiate, the client challenge # or client credentials prefixed with "YR " or "KK ". # # HTTP related format codes: # # REQUEST # # [http::]rm Request method (GET/POST etc) # [http::]>rm Request method from client # [http::]ru Request URL received from the client (or computed) # # Computed URLs are URIs of internally generated # requests and various "error:..." URIs. # # Unlike %ru, this request URI is not affected # by request adaptation, URL rewriting services, # and strip_query_terms. # # Honors uri_whitespace. # # This field is using pass-through URL encoding # by default. Encoding this field using other # variants of %-encoding will clash with # uri_whitespace modifications that also use # %-encoding. # # [http::]rs Request URL scheme from client # [http::]rd Request URL domain from client # [http::]rP Request URL port from client # [http::]rp Request URL path excluding hostname from client # [http::]rv Request protocol version from client # [http::]h Original received request header. # Usually differs from the request header sent by # Squid, although most fields are often preserved. # Accepts optional header field name/value filter # argument using name[:[separator]element] format. # [http::]>ha Received request header after adaptation and # redirection (pre-cache REQMOD vectoring point). # Usually differs from the request header sent by # Squid, although most fields are often preserved. # Optional header name argument as for >h # # RESPONSE # # [http::]Hs HTTP status code sent to the client # # [http::]h # # [http::]mt MIME content type # # # SIZE COUNTERS # # [http::]st Total size of request + reply traffic with client # [http::]>st Total size of request received from client. # Excluding chunked encoding bytes. # [http::]sh Size of request headers received from client # [http::]sni SSL client SNI sent to Squid. # # ssl::>cert_subject # The Subject field of the received client # SSL certificate or a dash ('-') if Squid has # received an invalid/malformed certificate or # no certificate at all. Consider encoding the # logged value because Subject often has spaces. # # ssl::>cert_issuer # The Issuer field of the received client # SSL certificate or a dash ('-') if Squid has # received an invalid/malformed certificate or # no certificate at all. Consider encoding the # logged value because Issuer often has spaces. # # ssl::negotiated_version The negotiated TLS version of the # client connection. # # %ssl::received_hello_version The TLS version of the Hello # message received from TLS client. # # %ssl::received_supported_version The maximum TLS version # supported by the TLS client. # # %ssl::negotiated_cipher The negotiated cipher of the # client connection. # # %ssl::a %Ss/%03>Hs %a %[ui %[un [%tl] "%rm %ru HTTP/%rv" %>Hs %a %[ui %[un [%tl] "%rm %ru HTTP/%rv" %>Hs %h" "%{User-Agent}>h" %Ss:%Sh #logformat referrer %ts.%03tu %>a %{Referer}>h %ru #logformat useragent %>a [%tl] "%{User-Agent}>h" # # NOTE: When the log_mime_hdrs directive is set to ON. # The squid, common and combined formats have a safely encoded copy # of the mime headers appended to each line within a pair of brackets. # # NOTE: The common and combined formats are not quite true to the Apache definition. # The logs from Squid contain an extra status and hierarchy code appended. # #Default: # The format definitions squid, common, combined, referrer, useragent are built in. # TAG: access_log # Configures whether and how Squid logs HTTP and ICP transactions. # If access logging is enabled, a single line is logged for every # matching HTTP or ICP request. The recommended directive formats are: # # access_log : [option ...] [acl acl ...] # access_log none [acl acl ...] # # The following directive format is accepted but may be deprecated: # access_log : [ [acl acl ...]] # # In most cases, the first ACL name must not contain the '=' character # and should not be equal to an existing logformat name. You can always # start with an 'all' ACL to work around those restrictions. # # Will log to the specified module:place using the specified format (which # must be defined in a logformat directive) those entries which match # ALL the acl's specified (which must be defined in acl clauses). # If no acl is specified, all requests will be logged to this destination. # # ===== Available options for the recommended directive format ===== # # logformat=name Names log line format (either built-in or # defined by a logformat directive). Defaults # to 'squid'. # # buffer-size=64KB Defines approximate buffering limit for log # records (see buffered_logs). Squid should not # keep more than the specified size and, hence, # should flush records before the buffer becomes # full to avoid overflows under normal # conditions (the exact flushing algorithm is # module-dependent though). The on-error option # controls overflow handling. # # on-error=die|drop Defines action on unrecoverable errors. The # 'drop' action ignores (i.e., does not log) # affected log records. The default 'die' action # kills the affected worker. The drop action # support has not been tested for modules other # than tcp. # # rotate=N Specifies the number of log file rotations to # make when you run 'squid -k rotate'. The default # is to obey the logfile_rotate directive. Setting # rotate=0 will disable the file name rotation, # but the log files are still closed and re-opened. # This will enable you to rename the logfiles # yourself just before sending the rotate signal. # Only supported by the stdio module. # # ===== Modules Currently available ===== # # none Do not log any requests matching these ACL. # Do not specify Place or logformat name. # # stdio Write each log line to disk immediately at the completion of # each request. # Place: the filename and path to be written. # # daemon Very similar to stdio. But instead of writing to disk the log # line is passed to a daemon helper for asychronous handling instead. # Place: varies depending on the daemon. # # log_file_daemon Place: the file name and path to be written. # # syslog To log each request via syslog facility. # Place: The syslog facility and priority level for these entries. # Place Format: facility.priority # # where facility could be any of: # authpriv, daemon, local0 ... local7 or user. # # And priority could be any of: # err, warning, notice, info, debug. # # udp To send each log line as text data to a UDP receiver. # Place: The destination host name or IP and port. # Place Format: //host:port # # tcp To send each log line as text data to a TCP receiver. # Lines may be accumulated before sending (see buffered_logs). # Place: The destination host name or IP and port. # Place Format: //host:port # # Default: # access_log daemon:/opt/local/var/squid/logs/access.log squid #Default: # access_log daemon:/opt/local/var/squid/logs/access.log squid access_log daemon:/opt/local/var/squid/logs/access.log squid #access_log daemon:/opt/local/var/squid/logs/access.log squid_ua # TAG: icap_log # ICAP log files record ICAP transaction summaries, one line per # transaction. # # The icap_log option format is: # icap_log [ [acl acl ...]] # icap_log none [acl acl ...]] # # Please see access_log option documentation for details. The two # kinds of logs share the overall configuration approach and many # features. # # ICAP processing of a single HTTP message or transaction may # require multiple ICAP transactions. In such cases, multiple # ICAP transaction log lines will correspond to a single access # log line. # # ICAP log supports many access.log logformat %codes. In ICAP context, # HTTP message-related %codes are applied to the HTTP message embedded # in an ICAP message. Logformat "%http::>..." codes are used for HTTP # messages embedded in ICAP requests while "%http::<..." codes are used # for HTTP messages embedded in ICAP responses. For example: # # http::>h To-be-adapted HTTP message headers sent by Squid to # the ICAP service. For REQMOD transactions, these are # HTTP request headers. For RESPMOD, these are HTTP # response headers, but Squid currently cannot log them # (i.e., %http::>h will expand to "-" for RESPMOD). # # http::st The total size of the ICAP request sent to the ICAP # server (ICAP headers + ICAP body), including chunking # metadata (if any). # # icap::h ICAP request header(s). Similar to >h. # # icap::A %icap::to/%03icap::Hs %icap::\n - logfile data # R\n - rotate file # T\n - truncate file # O\n - reopen file # F\n - flush file # r\n - set rotate count to # b\n - 1 = buffer output, 0 = don't buffer output # # No responses is expected. #Default: # logfile_daemon /opt/local/libexec/squid/log_file_daemon # TAG: stats_collection allow|deny acl acl... # This options allows you to control which requests gets accounted # in performance counters. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow logging for all transactions. # TAG: cache_store_log # Logs the activities of the storage manager. Shows which # objects are ejected from the cache, and which objects are # saved and for how long. # There are not really utilities to analyze this data, so you can safely # disable it (the default). # # Store log uses modular logging outputs. See access_log for the list # of modules supported. # # Example: # cache_store_log stdio:/opt/local/var/squid/logs/store.log # cache_store_log daemon:/opt/local/var/squid/logs/store.log #Default: # none # TAG: cache_swap_state # Location for the cache "swap.state" file. This index file holds # the metadata of objects saved on disk. It is used to rebuild # the cache during startup. Normally this file resides in each # 'cache_dir' directory, but you may specify an alternate # pathname here. Note you must give a full filename, not just # a directory. Since this is the index for the whole object # list you CANNOT periodically rotate it! # # If %s can be used in the file name it will be replaced with a # a representation of the cache_dir name where each / is replaced # with '.'. This is needed to allow adding/removing cache_dir # lines when cache_swap_log is being used. # # If have more than one 'cache_dir', and %s is not used in the name # these swap logs will have names such as: # # cache_swap_log.00 # cache_swap_log.01 # cache_swap_log.02 # # The numbered extension (which is added automatically) # corresponds to the order of the 'cache_dir' lines in this # configuration file. If you change the order of the 'cache_dir' # lines in this file, these index files will NOT correspond to # the correct 'cache_dir' entry (unless you manually rename # them). We recommend you do NOT use this option. It is # better to keep these index files in each 'cache_dir' directory. #Default: # Store the journal inside its cache_dir # TAG: logfile_rotate # Specifies the default number of logfile rotations to make when you # type 'squid -k rotate'. The default is 10, which will rotate # with extensions 0 through 9. Setting logfile_rotate to 0 will # disable the file name rotation, but the logfiles are still closed # and re-opened. This will enable you to rename the logfiles # yourself just before sending the rotate signal. # # Note, from Squid-3.1 this option is only a default for cache.log, # that log can be rotated separately by using debug_options. # # Note, from Squid-4 this option is only a default for access.log # recorded by stdio: module. Those logs can be rotated separately by # using the rotate=N option on their access_log directive. # # Note, the 'squid -k rotate' command normally sends a USR1 # signal to the running squid process. In certain situations # (e.g. on Linux with Async I/O), USR1 is used for other # purposes, so -k rotate uses another signal. It is best to get # in the habit of using 'squid -k rotate' instead of 'kill -USR1 # '. # # Note, from Squid-3.1 this option is only a default for cache.log, # that log can be rotated separately by using debug_options. #Default: # logfile_rotate 10 logfile_rotate 31 # TAG: mime_table # Path to Squid's icon configuration file. # # You shouldn't need to change this, but the default file contains # examples and formatting information if you do. #Default: # mime_table /opt/local/etc/squid/mime.conf # TAG: log_mime_hdrs on|off # The Cache can record both the request and the response MIME # headers for each HTTP transaction. The headers are encoded # safely and will appear as two bracketed fields at the end of # the access log (for either the native or httpd-emulated log # formats). To enable this logging set log_mime_hdrs to 'on'. #Default: # log_mime_hdrs off # TAG: pid_filename # A filename to write the process-id to. To disable, enter "none". #Default: # pid_filename /opt/local/var/run/squid/squid.pid # TAG: client_netmask # A netmask for client addresses in logfiles and cachemgr output. # Change this to protect the privacy of your cache clients. # A netmask of 255.255.255.0 will log all IP's in that range with # the last digit set to '0'. #Default: # Log full client IP address # TAG: strip_query_terms # By default, Squid strips query terms from requested URLs before # logging. This protects your user's privacy and reduces log size. # # When investigating HIT/MISS or other caching behaviour you # will need to disable this to see the full URL used by Squid. #Default: # strip_query_terms on # TAG: buffered_logs on|off # Whether to write/send access_log records ASAP or accumulate them and # then write/send them in larger chunks. Buffering may improve # performance because it decreases the number of I/Os. However, # buffering increases the delay before log records become available to # the final recipient (e.g., a disk file or logging daemon) and, # hence, increases the risk of log records loss. # # Note that even when buffered_logs are off, Squid may have to buffer # records if it cannot write/send them immediately due to pending I/Os # (e.g., the I/O writing the previous log record) or connectivity loss. # # Currently honored by 'daemon' and 'tcp' access_log modules only. #Default: # buffered_logs off buffered_logs on # TAG: netdb_filename # Note: This option is only available if Squid is rebuilt with the # --enable-icmp # # Where Squid stores it's netdb journal. # When enabled this journal preserves netdb state between restarts. # # To disable, enter "none". #Default: # netdb_filename stdio:/opt/local/var/squid/cache/netdb.state # OPTIONS FOR TROUBLESHOOTING # ----------------------------------------------------------------------------- # TAG: cache_log # Squid administrative logging file. # # This is where general information about Squid behavior goes. You can # increase the amount of data logged to this file and how often it is # rotated with "debug_options" #Default: # cache_log /opt/local/var/squid/logs/cache.log # TAG: debug_options # Logging options are set as section,level where each source file # is assigned a unique section. Lower levels result in less # output, Full debugging (level 9) can result in a very large # log file, so be careful. # # The magic word "ALL" sets debugging levels for all sections. # The default is to run with "ALL,1" to record important warnings. # # The rotate=N option can be used to keep more or less of these logs # than would otherwise be kept by logfile_rotate. # For most uses a single log should be enough to monitor current # events affecting Squid. #Default: # Log all critical and important messages. # TAG: coredump_dir # By default Squid leaves core files in the directory from where # it was started. If you set 'coredump_dir' to a directory # that exists, Squid will chdir() to that directory at startup # and coredump files will be left there. # #Default: # Use the directory from where Squid was started. # # Leave coredumps in the first cache dir coredump_dir /opt/local/var/squid/cache # OPTIONS FOR FTP GATEWAYING # ----------------------------------------------------------------------------- # TAG: ftp_user # If you want the anonymous login password to be more informative # (and enable the use of picky FTP servers), set this to something # reasonable for your domain, like wwwuser@somewhere.net # # The reason why this is domainless by default is the # request can be made on the behalf of a user in any domain, # depending on how the cache is used. # Some FTP server also validate the email address is valid # (for example perl.com). #Default: # ftp_user Squid@ # TAG: ftp_passive # If your firewall does not allow Squid to use passive # connections, turn off this option. # # Use of ftp_epsv_all option requires this to be ON. #Default: # ftp_passive on # TAG: ftp_epsv_all # FTP Protocol extensions permit the use of a special "EPSV ALL" command. # # NATs may be able to put the connection on a "fast path" through the # translator, as the EPRT command will never be used and therefore, # translation of the data portion of the segments will never be needed. # # When a client only expects to do two-way FTP transfers this may be # useful. # If squid finds that it must do a three-way FTP transfer after issuing # an EPSV ALL command, the FTP session will fail. # # If you have any doubts about this option do not use it. # Squid will nicely attempt all other connection methods. # # Requires ftp_passive to be ON (default) for any effect. #Default: # ftp_epsv_all off # TAG: ftp_epsv # FTP Protocol extensions permit the use of a special "EPSV" command. # # NATs may be able to put the connection on a "fast path" through the # translator using EPSV, as the EPRT command will never be used # and therefore, translation of the data portion of the segments # will never be needed. # # EPSV is often required to interoperate with FTP servers on IPv6 # networks. On the other hand, it may break some IPv4 servers. # # By default, EPSV may try EPSV with any FTP server. To fine tune # that decision, you may restrict EPSV to certain clients or servers # using ACLs: # # ftp_epsv allow|deny al1 acl2 ... # # WARNING: Disabling EPSV may cause problems with external NAT and IPv6. # # Only fast ACLs are supported. # Requires ftp_passive to be ON (default) for any effect. #Default: # none # TAG: ftp_eprt # FTP Protocol extensions permit the use of a special "EPRT" command. # # This extension provides a protocol neutral alternative to the # IPv4-only PORT command. When supported it enables active FTP data # channels over IPv6 and efficient NAT handling. # # Turning this OFF will prevent EPRT being attempted and will skip # straight to using PORT for IPv4 servers. # # Some devices are known to not handle this extension correctly and # may result in crashes. Devices which suport EPRT enough to fail # cleanly will result in Squid attempting PORT anyway. This directive # should only be disabled when EPRT results in device failures. # # WARNING: Doing so will convert Squid back to the old behavior with all # the related problems with external NAT devices/layers and IPv4-only FTP. #Default: # ftp_eprt on # TAG: ftp_sanitycheck # For security and data integrity reasons Squid by default performs # sanity checks of the addresses of FTP data connections ensure the # data connection is to the requested server. If you need to allow # FTP connections to servers using another IP address for the data # connection turn this off. #Default: # ftp_sanitycheck on # TAG: ftp_telnet_protocol # The FTP protocol is officially defined to use the telnet protocol # as transport channel for the control connection. However, many # implementations are broken and does not respect this aspect of # the FTP protocol. # # If you have trouble accessing files with ASCII code 255 in the # path or similar problems involving this ASCII code you can # try setting this directive to off. If that helps, report to the # operator of the FTP server in question that their FTP server # is broken and does not follow the FTP standard. #Default: # ftp_telnet_protocol on # OPTIONS FOR EXTERNAL SUPPORT PROGRAMS # ----------------------------------------------------------------------------- # TAG: diskd_program # Specify the location of the diskd executable. # Note this is only useful if you have compiled in # diskd as one of the store io modules. #Default: # diskd_program /opt/local/libexec/squid/diskd # TAG: unlinkd_program # Specify the location of the executable for file deletion process. #Default: # unlinkd_program /opt/local/libexec/squid/unlinkd # TAG: pinger_program # Note: This option is only available if Squid is rebuilt with the # --enable-icmp # # Specify the location of the executable for the pinger process. #Default: # pinger_program /opt/local/libexec/squid/pinger # TAG: pinger_enable # Note: This option is only available if Squid is rebuilt with the # --enable-icmp # # Control whether the pinger is active at run-time. # Enables turning ICMP pinger on and off with a simple # squid -k reconfigure. #Default: # pinger_enable on # OPTIONS FOR URL REWRITING # ----------------------------------------------------------------------------- # TAG: url_rewrite_program # Specify the location of the executable URL rewriter to use. # Since they can perform almost any function there isn't one included. # # For each requested URL, the rewriter will receive on line with the format # # [channel-ID ] URL [ extras] # # See url_rewrite_extras on how to send "extras" with optional values to # the helper. # After processing the request the helper must reply using the following format: # # [channel-ID ] result [ kv-pairs] # # The result code can be: # # OK status=30N url="..." # Redirect the URL to the one supplied in 'url='. # 'status=' is optional and contains the status code to send # the client in Squids HTTP response. It must be one of the # HTTP redirect status codes: 301, 302, 303, 307, 308. # When no status is given Squid will use 302. # # OK rewrite-url="..." # Rewrite the URL to the one supplied in 'rewrite-url='. # The new URL is fetched directly by Squid and returned to # the client as the response to its request. # # OK # When neither of url= and rewrite-url= are sent Squid does # not change the URL. # # ERR # Do not change the URL. # # BH # An internal error occurred in the helper, preventing # a result being identified. The 'message=' key name is # reserved for delivering a log message. # # # In addition to the above kv-pairs Squid also understands the following # optional kv-pairs received from URL rewriters: # clt_conn_tag=TAG # Associates a TAG with the client TCP connection. # The TAG is treated as a regular annotation but persists across # future requests on the client connection rather than just the # current request. A helper may update the TAG during subsequent # requests be returning a new kv-pair. # # When using the concurrency= option the protocol is changed by # introducing a query channel tag in front of the request/response. # The query channel tag is a number between 0 and concurrency-1. # This value must be echoed back unchanged to Squid as the first part # of the response relating to its request. # # WARNING: URL re-writing ability should be avoided whenever possible. # Use the URL redirect form of response instead. # # Re-write creates a difference in the state held by the client # and server. Possibly causing confusion when the server response # contains snippets of its view state. Embeded URLs, response # and content Location headers, etc. are not re-written by this # interface. # # By default, a URL rewriter is not used. #Default: # none # TAG: url_rewrite_children # Specifies the maximum number of redirector processes that Squid may # spawn (numberofchildren) and several related options. Using too few of # these helper processes (a.k.a. "helpers") creates request queues. # Using too many helpers wastes your system resources. # # Usage: numberofchildren [option]... # # The startup= and idle= options allow some measure of skew in your # tuning. # # startup= # # Sets a minimum of how many processes are to be spawned when Squid # starts or reconfigures. When set to zero the first request will # cause spawning of the first child process to handle it. # # Starting too few will cause an initial slowdown in traffic as Squid # attempts to simultaneously spawn enough processes to cope. # # idle= # # Sets a minimum of how many processes Squid is to try and keep available # at all times. When traffic begins to rise above what the existing # processes can handle this many more will be spawned up to the maximum # configured. A minimum setting of 1 is required. # # concurrency= # # The number of requests each redirector helper can handle in # parallel. Defaults to 0 which indicates the redirector # is a old-style single threaded redirector. # # When this directive is set to a value >= 1 then the protocol # used to communicate with the helper is modified to include # an ID in front of the request/response. The ID from the request # must be echoed back with the response to that request. # # queue-size=N # # Sets the maximum number of queued requests. A request is queued when # no existing child can accept it due to concurrency limit and no new # child can be started due to numberofchildren limit. The default # maximum is zero if url_rewrite_bypass is enabled and # 2*numberofchildren otherwise. If the queued requests exceed queue size # and redirector_bypass configuration option is set, then redirector is # bypassed. Otherwise, Squid is allowed to temporarily exceed the # configured maximum, marking the affected helper as "overloaded". If # the helper overload lasts more than 3 minutes, the action prescribed # by the on-persistent-overload option applies. # # on-persistent-overload=action # # Specifies Squid reaction to a new helper request arriving when the helper # has been overloaded for more that 3 minutes already. The number of queued # requests determines whether the helper is overloaded (see the queue-size # option). # # Two actions are supported: # # die Squid worker quits. This is the default behavior. # # ERR Squid treats the helper request as if it was # immediately submitted, and the helper immediately # replied with an ERR response. This action has no effect # on the already queued and in-progress helper requests. #Default: # url_rewrite_children 20 startup=0 idle=1 concurrency=0 # TAG: url_rewrite_host_header # To preserve same-origin security policies in browsers and # prevent Host: header forgery by redirectors Squid rewrites # any Host: header in redirected requests. # # If you are running an accelerator this may not be a wanted # effect of a redirector. This directive enables you disable # Host: alteration in reverse-proxy traffic. # # WARNING: Entries are cached on the result of the URL rewriting # process, so be careful if you have domain-virtual hosts. # # WARNING: Squid and other software verifies the URL and Host # are matching, so be careful not to relay through other proxies # or inspecting firewalls with this disabled. #Default: # url_rewrite_host_header on # TAG: url_rewrite_access # If defined, this access list specifies which requests are # sent to the redirector processes. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow, unless rules exist in squid.conf. # TAG: url_rewrite_bypass # When this is 'on', a request will not go through the # redirector if all the helpers are busy. If this is 'off' and the # redirector queue grows too large, the action is prescribed by the # on-persistent-overload option. You should only enable this if the # redirectors are not critical to your caching system. If you use # redirectors for access control, and you enable this option, # users may have access to pages they should not # be allowed to request. # # Enabling this option sets the default url_rewrite_children queue-size # option value to 0. #Default: # url_rewrite_bypass off # TAG: url_rewrite_extras # Specifies a string to be append to request line format for the # rewriter helper. "Quoted" format values may contain spaces and # logformat %macros. In theory, any logformat %macro can be used. # In practice, a %macro expands as a dash (-) if the helper request is # sent before the required macro information is available to Squid. #Default: # url_rewrite_extras "%>a/%>A %un %>rm myip=%la myport=%lp" # TAG: url_rewrite_timeout # Squid times active requests to redirector. The timeout value and Squid # reaction to a timed out request are configurable using the following # format: # # url_rewrite_timeout timeout time-units on_timeout= [response=] # # supported timeout actions: # fail Squid return a ERR_GATEWAY_FAILURE error page # # bypass Do not re-write the URL # # retry Send the lookup to the helper again # # use_configured_response # Use the as helper response #Default: # Squid waits for the helper response forever # OPTIONS FOR STORE ID # ----------------------------------------------------------------------------- # TAG: store_id_program # Specify the location of the executable StoreID helper to use. # Since they can perform almost any function there isn't one included. # # For each requested URL, the helper will receive one line with the format # # [channel-ID ] URL [ extras] # # # After processing the request the helper must reply using the following format: # # [channel-ID ] result [ kv-pairs] # # The result code can be: # # OK store-id="..." # Use the StoreID supplied in 'store-id='. # # ERR # The default is to use HTTP request URL as the store ID. # # BH # An internal error occurred in the helper, preventing # a result being identified. # # In addition to the above kv-pairs Squid also understands the following # optional kv-pairs received from URL rewriters: # clt_conn_tag=TAG # Associates a TAG with the client TCP connection. # Please see url_rewrite_program related documentation for this # kv-pair # # Helper programs should be prepared to receive and possibly ignore # additional whitespace-separated tokens on each input line. # # When using the concurrency= option the protocol is changed by # introducing a query channel tag in front of the request/response. # The query channel tag is a number between 0 and concurrency-1. # This value must be echoed back unchanged to Squid as the first part # of the response relating to its request. # # NOTE: when using StoreID refresh_pattern will apply to the StoreID # returned from the helper and not the URL. # # WARNING: Wrong StoreID value returned by a careless helper may result # in the wrong cached response returned to the user. # # By default, a StoreID helper is not used. #Default: # none # TAG: store_id_extras # Specifies a string to be append to request line format for the # StoreId helper. "Quoted" format values may contain spaces and # logformat %macros. In theory, any logformat %macro can be used. # In practice, a %macro expands as a dash (-) if the helper request is # sent before the required macro information is available to Squid. #Default: # store_id_extras "%>a/%>A %un %>rm myip=%la myport=%lp" # TAG: store_id_children # Specifies the maximum number of StoreID helper processes that Squid # may spawn (numberofchildren) and several related options. Using # too few of these helper processes (a.k.a. "helpers") creates request # queues. Using too many helpers wastes your system resources. # # Usage: numberofchildren [option]... # # The startup= and idle= options allow some measure of skew in your # tuning. # # startup= # # Sets a minimum of how many processes are to be spawned when Squid # starts or reconfigures. When set to zero the first request will # cause spawning of the first child process to handle it. # # Starting too few will cause an initial slowdown in traffic as Squid # attempts to simultaneously spawn enough processes to cope. # # idle= # # Sets a minimum of how many processes Squid is to try and keep available # at all times. When traffic begins to rise above what the existing # processes can handle this many more will be spawned up to the maximum # configured. A minimum setting of 1 is required. # # concurrency= # # The number of requests each storeID helper can handle in # parallel. Defaults to 0 which indicates the helper # is a old-style single threaded program. # # When this directive is set to a value >= 1 then the protocol # used to communicate with the helper is modified to include # an ID in front of the request/response. The ID from the request # must be echoed back with the response to that request. # # queue-size=N # # Sets the maximum number of queued requests to N. A request is queued # when no existing child can accept it due to concurrency limit and no # new child can be started due to numberofchildren limit. The default # maximum is 2*numberofchildren. If the queued requests exceed queue # size and redirector_bypass configuration option is set, then # redirector is bypassed. Otherwise, Squid is allowed to temporarily # exceed the configured maximum, marking the affected helper as # "overloaded". If the helper overload lasts more than 3 minutes, the # action prescribed by the on-persistent-overload option applies. # # on-persistent-overload=action # # Specifies Squid reaction to a new helper request arriving when the helper # has been overloaded for more that 3 minutes already. The number of queued # requests determines whether the helper is overloaded (see the queue-size # option). # # Two actions are supported: # # die Squid worker quits. This is the default behavior. # # ERR Squid treats the helper request as if it was # immediately submitted, and the helper immediately # replied with an ERR response. This action has no effect # on the already queued and in-progress helper requests. #Default: # store_id_children 20 startup=0 idle=1 concurrency=0 # TAG: store_id_access # If defined, this access list specifies which requests are # sent to the StoreID processes. By default all requests # are sent. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow, unless rules exist in squid.conf. # TAG: store_id_bypass # When this is 'on', a request will not go through the # helper if all helpers are busy. If this is 'off' and the helper # queue grows too large, the action is prescribed by the # on-persistent-overload option. You should only enable this if the # helpers are not critical to your caching system. If you use # helpers for critical caching components, and you enable this # option, users may not get objects from cache. # This options sets default queue-size option of the store_id_children # to 0. #Default: # store_id_bypass on # OPTIONS FOR TUNING THE CACHE # ----------------------------------------------------------------------------- # TAG: cache # Requests denied by this directive will not be served from the cache # and their responses will not be stored in the cache. This directive # has no effect on other transactions and on already cached responses. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # # This and the two other similar caching directives listed below are # checked at different transaction processing stages, have different # access to response information, affect different cache operations, # and differ in slow ACLs support: # # * cache: Checked before Squid makes a hit/miss determination. # No access to reply information! # Denies both serving a hit and storing a miss. # Supports both fast and slow ACLs. # * send_hit: Checked after a hit was detected. # Has access to reply (hit) information. # Denies serving a hit only. # Supports fast ACLs only. # * store_miss: Checked before storing a cachable miss. # Has access to reply (miss) information. # Denies storing a miss only. # Supports fast ACLs only. # # If you are not sure which of the three directives to use, apply the # following decision logic: # # * If your ACL(s) are of slow type _and_ need response info, redesign. # Squid does not support that particular combination at this time. # Otherwise: # * If your directive ACL(s) are of slow type, use "cache"; and/or # * if your directive ACL(s) need no response info, use "cache". # Otherwise: # * If you do not want the response cached, use store_miss; and/or # * if you do not want a hit on a cached response, use send_hit. #Default: # By default, this directive is unused and has no effect. # I2P # cache deny i2p # TAG: send_hit # Responses denied by this directive will not be served from the cache # (but may still be cached, see store_miss). This directive has no # effect on the responses it allows and on the cached objects. # # Please see the "cache" directive for a summary of differences among # store_miss, send_hit, and cache directives. # # Unlike the "cache" directive, send_hit only supports fast acl # types. See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # # For example: # # # apply custom Store ID mapping to some URLs # acl MapMe dstdomain .c.example.com # store_id_program ... # store_id_access allow MapMe # # # but prevent caching of special responses # # such as 302 redirects that cause StoreID loops # acl Ordinary http_status 200-299 # store_miss deny MapMe !Ordinary # # # and do not serve any previously stored special responses # # from the cache (in case they were already cached before # # the above store_miss rule was in effect). # send_hit deny MapMe !Ordinary #Default: # By default, this directive is unused and has no effect. # TAG: store_miss # Responses denied by this directive will not be cached (but may still # be served from the cache, see send_hit). This directive has no # effect on the responses it allows and on the already cached responses. # # Please see the "cache" directive for a summary of differences among # store_miss, send_hit, and cache directives. See the # send_hit directive for a usage example. # # Unlike the "cache" directive, store_miss only supports fast acl # types. See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # By default, this directive is unused and has no effect. # TAG: max_stale time-units # This option puts an upper limit on how stale content Squid # will serve from the cache if cache validation fails. # Can be overriden by the refresh_pattern max-stale option. #Default: # max_stale 1 week # TAG: refresh_pattern # usage: refresh_pattern [-i] regex min percent max [options] # # By default, regular expressions are CASE-SENSITIVE. To make # them case-insensitive, use the -i option. # # 'Min' is the time (in minutes) an object without an explicit # expiry time should be considered fresh. The recommended # value is 0, any higher values may cause dynamic applications # to be erroneously cached unless the application designer # has taken the appropriate actions. # # 'Percent' is a percentage of the objects age (time since last # modification age) an object without explicit expiry time # will be considered fresh. # # 'Max' is an upper limit on how long objects without an explicit # expiry time will be considered fresh. The value is also used # to form Cache-Control: max-age header for a request sent from # Squid to origin/parent. # # options: override-expire # override-lastmod # reload-into-ims # ignore-reload # ignore-no-store # ignore-private # max-stale=NN # refresh-ims # store-stale # # override-expire enforces min age even if the server # sent an explicit expiry time (e.g., with the # Expires: header or Cache-Control: max-age). Doing this # VIOLATES the HTTP standard. Enabling this feature # could make you liable for problems which it causes. # # Note: override-expire does not enforce staleness - it only extends # freshness / min. If the server returns a Expires time which # is longer than your max time, Squid will still consider # the object fresh for that period of time. # # override-lastmod enforces min age even on objects # that were modified recently. # # reload-into-ims changes a client no-cache or ``reload'' # request for a cached entry into a conditional request using # If-Modified-Since and/or If-None-Match headers, provided the # cached entry has a Last-Modified and/or a strong ETag header. # Doing this VIOLATES the HTTP standard. Enabling this feature # could make you liable for problems which it causes. # # ignore-reload ignores a client no-cache or ``reload'' # header. Doing this VIOLATES the HTTP standard. Enabling # this feature could make you liable for problems which # it causes. # # ignore-no-store ignores any ``Cache-control: no-store'' # headers received from a server. Doing this VIOLATES # the HTTP standard. Enabling this feature could make you # liable for problems which it causes. # # ignore-private ignores any ``Cache-control: private'' # headers received from a server. Doing this VIOLATES # the HTTP standard. Enabling this feature could make you # liable for problems which it causes. # # refresh-ims causes squid to contact the origin server # when a client issues an If-Modified-Since request. This # ensures that the client will receive an updated version # if one is available. # # store-stale stores responses even if they don't have explicit # freshness or a validator (i.e., Last-Modified or an ETag) # present, or if they're already stale. By default, Squid will # not cache such responses because they usually can't be # reused. Note that such responses will be stale by default. # # max-stale=NN provide a maximum staleness factor. Squid won't # serve objects more stale than this even if it failed to # validate the object. Default: use the max_stale global limit. # # Basically a cached object is: # # FRESH if expire > now, else STALE # STALE if age > max # FRESH if lm-factor < percent, else STALE # FRESH if age < min # else STALE # # The refresh_pattern lines are checked in the order listed here. # The first entry which matches is used. If none of the entries # match the default will be used. # # Note, you must uncomment all the default lines if you want # to change one. The default setting is only active if none is # used. # # # # Add any of your own refresh_pattern entries above these. # refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 #refresh_pattern . 0 20% 4320 # https://www.linux.com/news/speed-your-internet-access-using-squids-refresh-patterns refresh_pattern -i \.(gif|png|jpg|jpeg|ico)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.(iso|avi|wav|mp3|mp4|mpeg|swf|flv|x-flv)$ 43200 90% 432000 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.(deb|rpm|exe|zip|tar|tgz|ram|rar|bin|ppt|doc|tiff)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.index.(html|htm)$ 0 40% 10080 refresh_pattern -i \.(html|htm|css|js)$ 1440 40% 40320 refresh_pattern . 0 40% 40320 # TAG: quick_abort_min (KB) #Default: # quick_abort_min 16 KB quick_abort_min 0 KB # TAG: quick_abort_max (KB) #Default: # quick_abort_max 16 KB quick_abort_max 0 KB # TAG: quick_abort_pct (percent) # The cache by default continues downloading aborted requests # which are almost completed (less than 16 KB remaining). This # may be undesirable on slow (e.g. SLIP) links and/or very busy # caches. Impatient users may tie up file descriptors and # bandwidth by repeatedly requesting and immediately aborting # downloads. # # When the user aborts a request, Squid will check the # quick_abort values to the amount of data transferred until # then. # # If the transfer has less than 'quick_abort_min' KB remaining, # it will finish the retrieval. # # If the transfer has more than 'quick_abort_max' KB remaining, # it will abort the retrieval. # # If more than 'quick_abort_pct' of the transfer has completed, # it will finish the retrieval. # # If you do not want any retrieval to continue after the client # has aborted, set both 'quick_abort_min' and 'quick_abort_max' # to '0 KB'. # # If you want retrievals to always continue if they are being # cached set 'quick_abort_min' to '-1 KB'. #Default: # quick_abort_pct 95 # TAG: read_ahead_gap buffer-size # The amount of data the cache will buffer ahead of what has been # sent to the client when retrieving an object from another server. #Default: # read_ahead_gap 16 KB # TAG: negative_ttl time-units # Set the Default Time-to-Live (TTL) for failed requests. # Certain types of failures (such as "connection refused" and # "404 Not Found") are able to be negatively-cached for a short time. # Modern web servers should provide Expires: header, however if they # do not this can provide a minimum TTL. # The default is not to cache errors with unknown expiry details. # # Note that this is different from negative caching of DNS lookups. # # WARNING: Doing this VIOLATES the HTTP standard. Enabling # this feature could make you liable for problems which it # causes. #Default: # negative_ttl 0 seconds # TAG: positive_dns_ttl time-units # Upper limit on how long Squid will cache positive DNS responses. # Default is 6 hours (360 minutes). This directive must be set # larger than negative_dns_ttl. #Default: # positive_dns_ttl 6 hours # TAG: negative_dns_ttl time-units # Time-to-Live (TTL) for negative caching of failed DNS lookups. # This also sets the lower cache limit on positive lookups. # Minimum value is 1 second, and it is not recommendable to go # much below 10 seconds. #Default: # negative_dns_ttl 1 minutes # TAG: range_offset_limit size [acl acl...] # usage: (size) [units] [[!]aclname] # # Sets an upper limit on how far (number of bytes) into the file # a Range request may be to cause Squid to prefetch the whole file. # If beyond this limit, Squid forwards the Range request as it is and # the result is NOT cached. # # This is to stop a far ahead range request (lets say start at 17MB) # from making Squid fetch the whole object up to that point before # sending anything to the client. # # Multiple range_offset_limit lines may be specified, and they will # be searched from top to bottom on each request until a match is found. # The first match found will be used. If no line matches a request, the # default limit of 0 bytes will be used. # # 'size' is the limit specified as a number of units. # # 'units' specifies whether to use bytes, KB, MB, etc. # If no units are specified bytes are assumed. # # A size of 0 causes Squid to never fetch more than the # client requested. (default) # # A size of 'none' causes Squid to always fetch the object from the # beginning so it may cache the result. (2.0 style) # # 'aclname' is the name of a defined ACL. # # NP: Using 'none' as the byte value here will override any quick_abort settings # that may otherwise apply to the range request. The range request will # be fully fetched from start to finish regardless of the client # actions. This affects bandwidth usage. #Default: # none # TAG: minimum_expiry_time (seconds) # The minimum caching time according to (Expires - Date) # headers Squid honors if the object can't be revalidated. # The default is 60 seconds. # # In reverse proxy environments it might be desirable to honor # shorter object lifetimes. It is most likely better to make # your server return a meaningful Last-Modified header however. # # In ESI environments where page fragments often have short # lifetimes, this will often be best set to 0. #Default: # minimum_expiry_time 60 seconds # TAG: store_avg_object_size (bytes) # Average object size, used to estimate number of objects your # cache can hold. The default is 13 KB. # # This is used to pre-seed the cache index memory allocation to # reduce expensive reallocate operations while handling clients # traffic. Too-large values may result in memory allocation during # peak traffic, too-small values will result in wasted memory. # # Check the cache manager 'info' report metrics for the real # object sizes seen by your Squid before tuning this. #Default: # store_avg_object_size 13 KB # TAG: store_objects_per_bucket # Target number of objects per bucket in the store hash table. # Lowering this value increases the total number of buckets and # also the storage maintenance rate. The default is 20. #Default: # store_objects_per_bucket 20 # HTTP OPTIONS # ----------------------------------------------------------------------------- # TAG: request_header_max_size (KB) # This specifies the maximum size for HTTP headers in a request. # Request headers are usually relatively small (about 512 bytes). # Placing a limit on the request header size will catch certain # bugs (for example with persistent connections) and possibly # buffer-overflow or denial-of-service attacks. #Default: # request_header_max_size 64 KB # TAG: reply_header_max_size (KB) # This specifies the maximum size for HTTP headers in a reply. # Reply headers are usually relatively small (about 512 bytes). # Placing a limit on the reply header size will catch certain # bugs (for example with persistent connections) and possibly # buffer-overflow or denial-of-service attacks. #Default: # reply_header_max_size 64 KB # TAG: request_body_max_size (bytes) # This specifies the maximum size for an HTTP request body. # In other words, the maximum size of a PUT/POST request. # A user who attempts to send a request with a body larger # than this limit receives an "Invalid Request" error message. # If you set this parameter to a zero (the default), there will # be no limit imposed. # # See also client_request_buffer_max_size for an alternative # limitation on client uploads which can be configured. #Default: # No limit. # TAG: client_request_buffer_max_size (bytes) # This specifies the maximum buffer size of a client request. # It prevents squid eating too much memory when somebody uploads # a large file. #Default: # client_request_buffer_max_size 512 KB # TAG: broken_posts # A list of ACL elements which, if matched, causes Squid to send # an extra CRLF pair after the body of a PUT/POST request. # # Some HTTP servers has broken implementations of PUT/POST, # and rely on an extra CRLF pair sent by some WWW clients. # # Quote from RFC2616 section 4.1 on this matter: # # Note: certain buggy HTTP/1.0 client implementations generate an # extra CRLF's after a POST request. To restate what is explicitly # forbidden by the BNF, an HTTP/1.1 client must not preface or follow # a request with an extra CRLF. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # #Example: # acl buggy_server url_regex ^http://.... # broken_posts allow buggy_server #Default: # Obey RFC 2616. # TAG: adaptation_uses_indirect_client on|off # Controls whether the indirect client IP address (instead of the direct # client IP address) is passed to adaptation services. # # See also: follow_x_forwarded_for adaptation_send_client_ip #Default: # adaptation_uses_indirect_client on # TAG: via on|off # If set (default), Squid will include a Via header in requests and # replies as required by RFC2616. #Default: # via on via off # TAG: vary_ignore_expire on|off # Many HTTP servers supporting Vary gives such objects # immediate expiry time with no cache-control header # when requested by a HTTP/1.0 client. This option # enables Squid to ignore such expiry times until # HTTP/1.1 is fully implemented. # # WARNING: If turned on this may eventually cause some # varying objects not intended for caching to get cached. #Default: # vary_ignore_expire off # TAG: request_entities # Squid defaults to deny GET and HEAD requests with request entities, # as the meaning of such requests are undefined in the HTTP standard # even if not explicitly forbidden. # # Set this directive to on if you have clients which insists # on sending request entities in GET or HEAD requests. But be warned # that there is server software (both proxies and web servers) which # can fail to properly process this kind of request which may make you # vulnerable to cache pollution attacks if enabled. #Default: # request_entities off # TAG: request_header_access # Usage: request_header_access header_name allow|deny [!]aclname ... # # WARNING: Doing this VIOLATES the HTTP standard. Enabling # this feature could make you liable for problems which it # causes. # # This option replaces the old 'anonymize_headers' and the # older 'http_anonymizer' option with something that is much # more configurable. A list of ACLs for each header name allows # removal of specific header fields under specific conditions. # # This option only applies to outgoing HTTP request headers (i.e., # headers sent by Squid to the next HTTP hop such as a cache peer # or an origin server). The option has no effect during cache hit # detection. The equivalent adaptation vectoring point in ICAP # terminology is post-cache REQMOD. # # The option is applied to individual outgoing request header # fields. For each request header field F, Squid uses the first # qualifying sets of request_header_access rules: # # 1. Rules with header_name equal to F's name. # 2. Rules with header_name 'Other', provided F's name is not # on the hard-coded list of commonly used HTTP header names. # 3. Rules with header_name 'All'. # # Within that qualifying rule set, rule ACLs are checked as usual. # If ACLs of an "allow" rule match, the header field is allowed to # go through as is. If ACLs of a "deny" rule match, the header is # removed and request_header_replace is then checked to identify # if the removed header has a replacement. If no rules within the # set have matching ACLs, the header field is left as is. # # For example, to achieve the same behavior as the old # 'http_anonymizer standard' option, you should use: # # request_header_access From deny all # request_header_access Referer deny all # request_header_access User-Agent deny all # # Or, to reproduce the old 'http_anonymizer paranoid' feature # you should use: # # request_header_access Authorization allow all # request_header_access Proxy-Authorization allow all # request_header_access Cache-Control allow all # request_header_access Content-Length allow all # request_header_access Content-Type allow all # request_header_access Date allow all # request_header_access Host allow all # request_header_access If-Modified-Since allow all # request_header_access Pragma allow all # request_header_access Accept allow all # request_header_access Accept-Charset allow all # request_header_access Accept-Encoding allow all # request_header_access Accept-Language allow all # request_header_access Connection allow all # request_header_access All deny all # # HTTP reply headers are controlled with the reply_header_access directive. # # By default, all headers are allowed (no anonymizing is performed). #Default: # No limits. # allow localnet headers request_header_access From allow localnet request_header_access Server allow localnet request_header_access Link allow localnet request_header_access Cache-Control allow localnet request_header_access X-Cache allow localnet request_header_access X-Cache-Lookup allow localnet request_header_access Via allow localnet request_header_access Forwarded-For allow localnet request_header_access X-Forwarded-For allow localnet request_header_access Pragma allow localnet # old 'http_anonymizer standard' request_header_access From deny all # allow privoxy configuration to see the referer, then acl privoxy-config dstdomain config.privoxy.org p.p request_header_access Referer allow privoxy-config cache deny privoxy-config # forge Referer in Privoxy request_header_access Referer deny all request_header_access Server deny all # forge User-Agent below and in Privoxy # header_access User-Agent deny all # this breaks web authentication -- do not use #! header_access WWW-Authenticate deny all request_header_access Link deny all # more privacy request_header_access X-Cache deny all request_header_access X-Cache-Lookup deny all request_header_access Via deny all request_header_access Forwarded-For deny all request_header_access X-Forwarded-For deny all request_header_access Pragma deny all #! These slow down browsing a lot -- do not use # header_access Cache-Control deny all # header_access Keep-Alive deny all # Mobile carrier uniquely identifying headers request_header_access MSISDN deny all # T-Mobile request_header_access X-MSISDN deny all # T-Mobile request_header_access X-UIDH deny all # Verizon request_header_access x-up-subno deny all # AT&T request_header_access X-ACR deny all # AT&T request_header_access X-UP-SUBSCRIBER-COS deny all request_header_access X-OPWV-DDM-HTTPMISCDD deny all request_header_access X-OPWV-DDM-IDENTITY deny all request_header_access X-OPWV-DDM-SUBSCRIBER deny all request_header_access CLIENTID deny all request_header_access X-VF-ACR deny all request_header_access X_MTI_USERNAME deny all request_header_access X_MTI_EMAIL deny all request_header_access X_MTI_EMPID deny all request_header_access User-Agent deny all request_header_replace User-Agent Mozilla/5.0 (iPad; CPU OS 12_1_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Mobile/15E148 Safari/604.1 # TAG: reply_header_access # Usage: reply_header_access header_name allow|deny [!]aclname ... # # WARNING: Doing this VIOLATES the HTTP standard. Enabling # this feature could make you liable for problems which it # causes. # # This option only applies to reply headers, i.e., from the # server to the client. # # This is the same as request_header_access, but in the other # direction. Please see request_header_access for detailed # documentation. # # For example, to achieve the same behavior as the old # 'http_anonymizer standard' option, you should use: # # reply_header_access Server deny all # reply_header_access WWW-Authenticate deny all # reply_header_access Link deny all # # Or, to reproduce the old 'http_anonymizer paranoid' feature # you should use: # # reply_header_access Allow allow all # reply_header_access WWW-Authenticate allow all # reply_header_access Proxy-Authenticate allow all # reply_header_access Cache-Control allow all # reply_header_access Content-Encoding allow all # reply_header_access Content-Length allow all # reply_header_access Content-Type allow all # reply_header_access Date allow all # reply_header_access Expires allow all # reply_header_access Last-Modified allow all # reply_header_access Location allow all # reply_header_access Pragma allow all # reply_header_access Content-Language allow all # reply_header_access Retry-After allow all # reply_header_access Title allow all # reply_header_access Content-Disposition allow all # reply_header_access Connection allow all # reply_header_access All deny all # # HTTP request headers are controlled with the request_header_access directive. # # By default, all headers are allowed (no anonymizing is # performed). #Default: # No limits. # TAG: request_header_replace # Usage: request_header_replace header_name message # Example: request_header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit) # # This option allows you to change the contents of headers # denied with request_header_access above, by replacing them # with some fixed string. # # This only applies to request headers, not reply headers. # # By default, headers are removed if denied. #Default: # none # TAG: reply_header_replace # Usage: reply_header_replace header_name message # Example: reply_header_replace Server Foo/1.0 # # This option allows you to change the contents of headers # denied with reply_header_access above, by replacing them # with some fixed string. # # This only applies to reply headers, not request headers. # # By default, headers are removed if denied. #Default: # none # TAG: request_header_add # Usage: request_header_add field-name field-value [ acl ... ] # Example: request_header_add X-Client-CA "CA=%ssl::>cert_issuer" all # # This option adds header fields to outgoing HTTP requests (i.e., # request headers sent by Squid to the next HTTP hop such as a # cache peer or an origin server). The option has no effect during # cache hit detection. The equivalent adaptation vectoring point # in ICAP terminology is post-cache REQMOD. # # Field-name is a token specifying an HTTP header name. If a # standard HTTP header name is used, Squid does not check whether # the new header conflicts with any existing headers or violates # HTTP rules. If the request to be modified already contains a # field with the same name, the old field is preserved but the # header field values are not merged. # # Field-value is either a token or a quoted string. If quoted # string format is used, then the surrounding quotes are removed # while escape sequences and %macros are processed. # # One or more Squid ACLs may be specified to restrict header # injection to matching requests. As always in squid.conf, all # ACLs in the ACL list must be satisfied for the insertion to # happen. The request_header_add supports fast ACLs only. # # See also: reply_header_add. #Default: # none # TAG: reply_header_add # Usage: reply_header_add field-name field-value [ acl ... ] # Example: reply_header_add X-Client-CA "CA=%ssl::>cert_issuer" all # # This option adds header fields to outgoing HTTP responses (i.e., response # headers delivered by Squid to the client). This option has no effect on # cache hit detection. The equivalent adaptation vectoring point in # ICAP terminology is post-cache RESPMOD. This option does not apply to # successful CONNECT replies. # # Field-name is a token specifying an HTTP header name. If a # standard HTTP header name is used, Squid does not check whether # the new header conflicts with any existing headers or violates # HTTP rules. If the response to be modified already contains a # field with the same name, the old field is preserved but the # header field values are not merged. # # Field-value is either a token or a quoted string. If quoted # string format is used, then the surrounding quotes are removed # while escape sequences and %macros are processed. # # One or more Squid ACLs may be specified to restrict header # injection to matching responses. As always in squid.conf, all # ACLs in the ACL list must be satisfied for the insertion to # happen. The reply_header_add option supports fast ACLs only. # # See also: request_header_add. #Default: # none # TAG: note # This option used to log custom information about the master # transaction. For example, an admin may configure Squid to log # which "user group" the transaction belongs to, where "user group" # will be determined based on a set of ACLs and not [just] # authentication information. # Values of key/value pairs can be logged using %{key}note macros: # # note key value acl ... # logformat myFormat ... %{key}note ... #Default: # none # TAG: relaxed_header_parser on|off|warn # In the default "on" setting Squid accepts certain forms # of non-compliant HTTP messages where it is unambiguous # what the sending application intended even if the message # is not correctly formatted. The messages is then normalized # to the correct form when forwarded by Squid. # # If set to "warn" then a warning will be emitted in cache.log # each time such HTTP error is encountered. # # If set to "off" then such HTTP errors will cause the request # or response to be rejected. #Default: # relaxed_header_parser on # TAG: collapsed_forwarding (on|off) # This option controls whether Squid is allowed to merge multiple # potentially cachable requests for the same URI before Squid knows # whether the response is going to be cachable. # # When enabled, instead of forwarding each concurrent request for # the same URL, Squid just sends the first of them. The other, so # called "collapsed" requests, wait for the response to the first # request and, if it happens to be cachable, use that response. # Here, "concurrent requests" means "received after the first # request headers were parsed and before the corresponding response # headers were parsed". # # This feature is disabled by default: enabling collapsed # forwarding needlessly delays forwarding requests that look # cachable (when they are collapsed) but then need to be forwarded # individually anyway because they end up being for uncachable # content. However, in some cases, such as acceleration of highly # cachable content with periodic or grouped expiration times, the # gains from collapsing [large volumes of simultaneous refresh # requests] outweigh losses from such delays. # # Squid collapses two kinds of requests: regular client requests # received on one of the listening ports and internal "cache # revalidation" requests which are triggered by those regular # requests hitting a stale cached object. Revalidation collapsing # is currently disabled for Squid instances containing SMP-aware # disk or memory caches and for Vary-controlled cached objects. #Default: # collapsed_forwarding off # TAG: collapsed_forwarding_shared_entries_limit (number of entries) # This limits the size of a table used for sharing information # about collapsible entries among SMP workers. Limiting sharing # too much results in cache content duplication and missed # collapsing opportunities. Using excessively large values # wastes shared memory. # # The limit should be significantly larger then the number of # concurrent collapsible entries one wants to share. For a cache # that handles less than 5000 concurrent requests, the default # setting of 16384 should be plenty. # # If the limit is set to zero, it disables sharing of collapsed # forwarding between SMP workers. #Default: # collapsed_forwarding_shared_entries_limit 16384 # TIMEOUTS # ----------------------------------------------------------------------------- # TAG: forward_timeout time-units # This parameter specifies how long Squid should at most attempt in # finding a forwarding path for the request before giving up. #Default: # forward_timeout 4 minutes # TAG: connect_timeout time-units # This parameter specifies how long to wait for the TCP connect to # the requested server or peer to complete before Squid should # attempt to find another path where to forward the request. #Default: # connect_timeout 1 minute # TAG: peer_connect_timeout time-units # This parameter specifies how long to wait for a pending TCP # connection to a peer cache. The default is 30 seconds. You # may also set different timeout values for individual neighbors # with the 'connect-timeout' option on a 'cache_peer' line. #Default: # peer_connect_timeout 30 seconds # TAG: read_timeout time-units # Applied on peer server connections. # # After each successful read(), the timeout will be extended by this # amount. If no data is read again after this amount of time, # the request is aborted and logged with ERR_READ_TIMEOUT. # # The default is 15 minutes. #Default: # read_timeout 15 minutes # TAG: write_timeout time-units # This timeout is tracked for all connections that have data # available for writing and are waiting for the socket to become # ready. After each successful write, the timeout is extended by # the configured amount. If Squid has data to write but the # connection is not ready for the configured duration, the # transaction associated with the connection is terminated. The # default is 15 minutes. #Default: # write_timeout 15 minutes # TAG: request_timeout # How long to wait for complete HTTP request headers after initial # connection establishment. #Default: # request_timeout 5 minutes # TAG: request_start_timeout # How long to wait for the first request byte after initial # connection establishment. #Default: # request_start_timeout 5 minutes # TAG: client_idle_pconn_timeout # How long to wait for the next HTTP request on a persistent # client connection after the previous request completes. #Default: # client_idle_pconn_timeout 2 minutes # TAG: ftp_client_idle_timeout # How long to wait for an FTP request on a connection to Squid ftp_port. # Many FTP clients do not deal with idle connection closures well, # necessitating a longer default timeout than client_idle_pconn_timeout # used for incoming HTTP requests. #Default: # ftp_client_idle_timeout 30 minutes # TAG: client_lifetime time-units # The maximum amount of time a client (browser) is allowed to # remain connected to the cache process. This protects the Cache # from having a lot of sockets (and hence file descriptors) tied up # in a CLOSE_WAIT state from remote clients that go away without # properly shutting down (either because of a network failure or # because of a poor client implementation). The default is one # day, 1440 minutes. # # NOTE: The default value is intended to be much larger than any # client would ever need to be connected to your cache. You # should probably change client_lifetime only as a last resort. # If you seem to have many client connections tying up # filedescriptors, we recommend first tuning the read_timeout, # request_timeout, persistent_request_timeout and quick_abort values. #Default: # client_lifetime 1 day # TAG: pconn_lifetime time-units # Desired maximum lifetime of a persistent connection. # When set, Squid will close a now-idle persistent connection that # exceeded configured lifetime instead of moving the connection into # the idle connection pool (or equivalent). No effect on ongoing/active # transactions. Connection lifetime is the time period from the # connection acceptance or opening time until "now". # # This limit is useful in environments with long-lived connections # where Squid configuration or environmental factors change during a # single connection lifetime. If unrestricted, some connections may # last for hours and even days, ignoring those changes that should # have affected their behavior or their existence. # # Currently, a new lifetime value supplied via Squid reconfiguration # has no effect on already idle connections unless they become busy. # # When set to '0' this limit is not used. #Default: # pconn_lifetime 0 seconds # TAG: half_closed_clients # Some clients may shutdown the sending side of their TCP # connections, while leaving their receiving sides open. Sometimes, # Squid can not tell the difference between a half-closed and a # fully-closed TCP connection. # # By default, Squid will immediately close client connections when # read(2) returns "no more data to read." # # Change this option to 'on' and Squid will keep open connections # until a read(2) or write(2) on the socket returns an error. # This may show some benefits for reverse proxies. But if not # it is recommended to leave OFF. #Default: # half_closed_clients off # TAG: server_idle_pconn_timeout # Timeout for idle persistent connections to servers and other # proxies. #Default: # server_idle_pconn_timeout 1 minute # TAG: ident_timeout # Maximum time to wait for IDENT lookups to complete. # # If this is too high, and you enabled IDENT lookups from untrusted # users, you might be susceptible to denial-of-service by having # many ident requests going at once. #Default: # ident_timeout 10 seconds # TAG: shutdown_lifetime time-units # When SIGTERM or SIGHUP is received, the cache is put into # "shutdown pending" mode until all active sockets are closed. # This value is the lifetime to set for all open descriptors # during shutdown mode. Any active clients after this many # seconds will receive a 'timeout' message. #Default: # shutdown_lifetime 30 seconds # Make this significantly less than daemondo's kChildDeathTimeout # to avoid multiple squid processes at boot or on network change # const CFTimeInterval kChildDeathTimeout = 20; shutdown_lifetime 5 seconds # ADMINISTRATIVE PARAMETERS # ----------------------------------------------------------------------------- # TAG: cache_mgr # Email-address of local cache manager who will receive # mail if the cache dies. The default is "webmaster". #Default: # cache_mgr webmaster # TAG: mail_from # From: email-address for mail sent when the cache dies. # The default is to use 'squid@unique_hostname'. # # See also: unique_hostname directive. #Default: # none # TAG: mail_program # Email program used to send mail if the cache dies. # The default is "mail". The specified program must comply # with the standard Unix mail syntax: # mail-program recipient < mailfile # # Optional command line options can be specified. #Default: # mail_program mail # TAG: cache_effective_user # If you start Squid as root, it will change its effective/real # UID/GID to the user specified below. The default is to change # to UID of squid. # see also; cache_effective_group #Default: # cache_effective_user squid # TAG: cache_effective_group # Squid sets the GID to the effective user's default group ID # (taken from the password file) and supplementary group list # from the groups membership. # # If you want Squid to run with a specific GID regardless of # the group memberships of the effective user then set this # to the group (or GID) you want Squid to run as. When set # all other group privileges of the effective user are ignored # and only this GID is effective. If Squid is not started as # root the user starting Squid MUST be member of the specified # group. # # This option is not recommended by the Squid Team. # Our preference is for administrators to configure a secure # user account for squid with UID/GID matching system policies. #Default: # Use system group memberships of the cache_effective_user account # TAG: httpd_suppress_version_string on|off # Suppress Squid version string info in HTTP headers and HTML error pages. #Default: # httpd_suppress_version_string off # TAG: visible_hostname # If you want to present a special hostname in error messages, etc, # define this. Otherwise, the return value of gethostname() # will be used. If you have multiple caches in a cluster and # get errors about IP-forwarding you must set them to have individual # names with this setting. #Default: # Automatically detect the system host name visible_hostname localhost # TAG: unique_hostname # If you want to have multiple machines with the same # 'visible_hostname' you must give each machine a different # 'unique_hostname' so forwarding loops can be detected. #Default: # Copy the value from visible_hostname # TAG: hostname_aliases # A list of other DNS names your cache has. #Default: # none # TAG: umask # Minimum umask which should be enforced while the proxy # is running, in addition to the umask set at startup. # # For a traditional octal representation of umasks, start # your value with 0. #Default: # umask 027 # OPTIONS FOR THE CACHE REGISTRATION SERVICE # ----------------------------------------------------------------------------- # # This section contains parameters for the (optional) cache # announcement service. This service is provided to help # cache administrators locate one another in order to join or # create cache hierarchies. # # An 'announcement' message is sent (via UDP) to the registration # service by Squid. By default, the announcement message is NOT # SENT unless you enable it with 'announce_period' below. # # The announcement message includes your hostname, plus the # following information from this configuration file: # # http_port # icp_port # cache_mgr # # All current information is processed regularly and made # available on the Web at http://www.ircache.net/Cache/Tracker/. # TAG: announce_period # This is how frequently to send cache announcements. # # To enable announcing your cache, just set an announce period. # # Example: # announce_period 1 day #Default: # Announcement messages disabled. # TAG: announce_host # Set the hostname where announce registration messages will be sent. # # See also announce_port and announce_file #Default: # announce_host tracker.ircache.net # TAG: announce_file # The contents of this file will be included in the announce # registration messages. #Default: # none # TAG: announce_port # Set the port where announce registration messages will be sent. # # See also announce_host and announce_file #Default: # announce_port 3131 # HTTPD-ACCELERATOR OPTIONS # ----------------------------------------------------------------------------- # TAG: httpd_accel_surrogate_id # Surrogates (http://www.esi.org/architecture_spec_1.0.html) # need an identification token to allow control targeting. Because # a farm of surrogates may all perform the same tasks, they may share # an identification token. #Default: # visible_hostname is used if no specific ID is set. # TAG: http_accel_surrogate_remote on|off # Remote surrogates (such as those in a CDN) honour the header # "Surrogate-Control: no-store-remote". # # Set this to on to have squid behave as a remote surrogate. #Default: # http_accel_surrogate_remote off # TAG: esi_parser libxml2|expat # Selects the XML parsing library to use when interpreting responses with # Edge Side Includes. # # To disable ESI handling completely, ./configure Squid with --disable-esi. #Default: # Selects libxml2 if available at ./configure time or libexpat otherwise. # DELAY POOL PARAMETERS # ----------------------------------------------------------------------------- # TAG: delay_pools # This represents the number of delay pools to be used. For example, # if you have one class 2 delay pool and one class 3 delays pool, you # have a total of 2 delay pools. # # See also delay_parameters, delay_class, delay_access for pool # configuration details. #Default: # delay_pools 0 # TAG: delay_class # This defines the class of each delay pool. There must be exactly one # delay_class line for each delay pool. For example, to define two # delay pools, one of class 2 and one of class 3, the settings above # and here would be: # # Example: # delay_pools 4 # 4 delay pools # delay_class 1 2 # pool 1 is a class 2 pool # delay_class 2 3 # pool 2 is a class 3 pool # delay_class 3 4 # pool 3 is a class 4 pool # delay_class 4 5 # pool 4 is a class 5 pool # # The delay pool classes are: # # class 1 Everything is limited by a single aggregate # bucket. # # class 2 Everything is limited by a single aggregate # bucket as well as an "individual" bucket chosen # from bits 25 through 32 of the IPv4 address. # # class 3 Everything is limited by a single aggregate # bucket as well as a "network" bucket chosen # from bits 17 through 24 of the IP address and a # "individual" bucket chosen from bits 17 through # 32 of the IPv4 address. # # class 4 Everything in a class 3 delay pool, with an # additional limit on a per user basis. This # only takes effect if the username is established # in advance - by forcing authentication in your # http_access rules. # # class 5 Requests are grouped according their tag (see # external_acl's tag= reply). # # # Each pool also requires a delay_parameters directive to configure the pool size # and speed limits used whenever the pool is applied to a request. Along with # a set of delay_access directives to determine when it is used. # # NOTE: If an IP address is a.b.c.d # -> bits 25 through 32 are "d" # -> bits 17 through 24 are "c" # -> bits 17 through 32 are "c * 256 + d" # # NOTE-2: Due to the use of bitmasks in class 2,3,4 pools they only apply to # IPv4 traffic. Class 1 and 5 pools may be used with IPv6 traffic. # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # # See also delay_parameters and delay_access. #Default: # none # TAG: delay_access # This is used to determine which delay pool a request falls into. # # delay_access is sorted per pool and the matching starts with pool 1, # then pool 2, ..., and finally pool N. The first delay pool where the # request is allowed is selected for the request. If it does not allow # the request to any pool then the request is not delayed (default). # # For example, if you want some_big_clients in delay # pool 1 and lotsa_little_clients in delay pool 2: # # delay_access 1 allow some_big_clients # delay_access 1 deny all # delay_access 2 allow lotsa_little_clients # delay_access 2 deny all # delay_access 3 allow authenticated_clients # # See also delay_parameters and delay_class. # #Default: # Deny using the pool, unless allow rules exist in squid.conf for the pool. # TAG: delay_parameters # This defines the parameters for a delay pool. Each delay pool has # a number of "buckets" associated with it, as explained in the # description of delay_class. # # For a class 1 delay pool, the syntax is: # delay_class pool 1 # delay_parameters pool aggregate # # For a class 2 delay pool: # delay_class pool 2 # delay_parameters pool aggregate individual # # For a class 3 delay pool: # delay_class pool 3 # delay_parameters pool aggregate network individual # # For a class 4 delay pool: # delay_class pool 4 # delay_parameters pool aggregate network individual user # # For a class 5 delay pool: # delay_class pool 5 # delay_parameters pool tagrate # # The option variables are: # # pool a pool number - ie, a number between 1 and the # number specified in delay_pools as used in # delay_class lines. # # aggregate the speed limit parameters for the aggregate bucket # (class 1, 2, 3). # # individual the speed limit parameters for the individual # buckets (class 2, 3). # # network the speed limit parameters for the network buckets # (class 3). # # user the speed limit parameters for the user buckets # (class 4). # # tagrate the speed limit parameters for the tag buckets # (class 5). # # A pair of delay parameters is written restore/maximum, where restore is # the number of bytes (not bits - modem and network speeds are usually # quoted in bits) per second placed into the bucket, and maximum is the # maximum number of bytes which can be in the bucket at any time. # # There must be one delay_parameters line for each delay pool. # # # For example, if delay pool number 1 is a class 2 delay pool as in the # above example, and is being used to strictly limit each host to 64Kbit/sec # (plus overheads), with no overall limit, the line is: # # delay_parameters 1 none 8000/8000 # # Note that 8 x 8K Byte/sec -> 64K bit/sec. # # Note that the word 'none' is used to represent no limit. # # # And, if delay pool number 2 is a class 3 delay pool as in the above # example, and you want to limit it to a total of 256Kbit/sec (strict limit) # with each 8-bit network permitted 64Kbit/sec (strict limit) and each # individual host permitted 4800bit/sec with a bucket maximum size of 64Kbits # to permit a decent web page to be downloaded at a decent speed # (if the network is not being limited due to overuse) but slow down # large downloads more significantly: # # delay_parameters 2 32000/32000 8000/8000 600/8000 # # Note that 8 x 32K Byte/sec -> 256K bit/sec. # 8 x 8K Byte/sec -> 64K bit/sec. # 8 x 600 Byte/sec -> 4800 bit/sec. # # # Finally, for a class 4 delay pool as in the example - each user will # be limited to 128Kbits/sec no matter how many workstations they are logged into.: # # delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000 # # # See also delay_class and delay_access. # #Default: # none # TAG: delay_initial_bucket_level (percent, 0-100) # The initial bucket percentage is used to determine how much is put # in each bucket when squid starts, is reconfigured, or first notices # a host accessing it (in class 2 and class 3, individual hosts and # networks only have buckets associated with them once they have been # "seen" by squid). #Default: # delay_initial_bucket_level 50 # CLIENT DELAY POOL PARAMETERS # ----------------------------------------------------------------------------- # TAG: client_delay_pools # This option specifies the number of client delay pools used. It must # preceed other client_delay_* options. # # Example: # client_delay_pools 2 # # See also client_delay_parameters and client_delay_access. #Default: # client_delay_pools 0 # TAG: client_delay_initial_bucket_level (percent, 0-no_limit) # This option determines the initial bucket size as a percentage of # max_bucket_size from client_delay_parameters. Buckets are created # at the time of the "first" connection from the matching IP. Idle # buckets are periodically deleted up. # # You can specify more than 100 percent but note that such "oversized" # buckets are not refilled until their size goes down to max_bucket_size # from client_delay_parameters. # # Example: # client_delay_initial_bucket_level 50 #Default: # client_delay_initial_bucket_level 50 # TAG: client_delay_parameters # # This option configures client-side bandwidth limits using the # following format: # # client_delay_parameters pool speed_limit max_bucket_size # # pool is an integer ID used for client_delay_access matching. # # speed_limit is bytes added to the bucket per second. # # max_bucket_size is the maximum size of a bucket, enforced after any # speed_limit additions. # # Please see the delay_parameters option for more information and # examples. # # Example: # client_delay_parameters 1 1024 2048 # client_delay_parameters 2 51200 16384 # # See also client_delay_access. # #Default: # none # TAG: client_delay_access # This option determines the client-side delay pool for the # request: # # client_delay_access pool_ID allow|deny acl_name # # All client_delay_access options are checked in their pool ID # order, starting with pool 1. The first checked pool with allowed # request is selected for the request. If no ACL matches or there # are no client_delay_access options, the request bandwidth is not # limited. # # The ACL-selected pool is then used to find the # client_delay_parameters for the request. Client-side pools are # not used to aggregate clients. Clients are always aggregated # based on their source IP addresses (one bucket per source IP). # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # Additionally, only the client TCP connection details are available. # ACLs testing HTTP properties will not work. # # Please see delay_access for more examples. # # Example: # client_delay_access 1 allow low_rate_network # client_delay_access 2 allow vips_network # # # See also client_delay_parameters and client_delay_pools. #Default: # Deny use of the pool, unless allow rules exist in squid.conf for the pool. # WCCPv1 AND WCCPv2 CONFIGURATION OPTIONS # ----------------------------------------------------------------------------- # TAG: wccp_router # Use this option to define your WCCP ``home'' router for # Squid. # # wccp_router supports a single WCCP(v1) router # # wccp2_router supports multiple WCCPv2 routers # # only one of the two may be used at the same time and defines # which version of WCCP to use. #Default: # WCCP disabled. # TAG: wccp2_router # Use this option to define your WCCP ``home'' router for # Squid. # # wccp_router supports a single WCCP(v1) router # # wccp2_router supports multiple WCCPv2 routers # # only one of the two may be used at the same time and defines # which version of WCCP to use. #Default: # WCCPv2 disabled. # TAG: wccp_version # This directive is only relevant if you need to set up WCCP(v1) # to some very old and end-of-life Cisco routers. In all other # setups it must be left unset or at the default setting. # It defines an internal version in the WCCP(v1) protocol, # with version 4 being the officially documented protocol. # # According to some users, Cisco IOS 11.2 and earlier only # support WCCP version 3. If you're using that or an earlier # version of IOS, you may need to change this value to 3, otherwise # do not specify this parameter. #Default: # wccp_version 4 # TAG: wccp2_rebuild_wait # If this is enabled Squid will wait for the cache dir rebuild to finish # before sending the first wccp2 HereIAm packet #Default: # wccp2_rebuild_wait on # TAG: wccp2_forwarding_method # WCCP2 allows the setting of forwarding methods between the # router/switch and the cache. Valid values are as follows: # # gre - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) # l2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) # # Currently (as of IOS 12.4) cisco routers only support GRE. # Cisco switches only support the L2 redirect assignment method. #Default: # wccp2_forwarding_method gre # TAG: wccp2_return_method # WCCP2 allows the setting of return methods between the # router/switch and the cache for packets that the cache # decides not to handle. Valid values are as follows: # # gre - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) # l2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) # # Currently (as of IOS 12.4) cisco routers only support GRE. # Cisco switches only support the L2 redirect assignment. # # If the "ip wccp redirect exclude in" command has been # enabled on the cache interface, then it is still safe for # the proxy server to use a l2 redirect method even if this # option is set to GRE. #Default: # wccp2_return_method gre # TAG: wccp2_assignment_method # WCCP2 allows the setting of methods to assign the WCCP hash # Valid values are as follows: # # hash - Hash assignment # mask - Mask assignment # # As a general rule, cisco routers support the hash assignment method # and cisco switches support the mask assignment method. #Default: # wccp2_assignment_method hash # TAG: wccp2_service # WCCP2 allows for multiple traffic services. There are two # types: "standard" and "dynamic". The standard type defines # one service id - http (id 0). The dynamic service ids can be from # 51 to 255 inclusive. In order to use a dynamic service id # one must define the type of traffic to be redirected; this is done # using the wccp2_service_info option. # # The "standard" type does not require a wccp2_service_info option, # just specifying the service id will suffice. # # MD5 service authentication can be enabled by adding # "password=" to the end of this service declaration. # # Examples: # # wccp2_service standard 0 # for the 'web-cache' standard service # wccp2_service dynamic 80 # a dynamic service type which will be # # fleshed out with subsequent options. # wccp2_service standard 0 password=foo #Default: # Use the 'web-cache' standard service. # TAG: wccp2_service_info # Dynamic WCCPv2 services require further information to define the # traffic you wish to have diverted. # # The format is: # # wccp2_service_info protocol= flags=,.. # priority= ports=,.. # # The relevant WCCPv2 flags: # + src_ip_hash, dst_ip_hash # + source_port_hash, dst_port_hash # + src_ip_alt_hash, dst_ip_alt_hash # + src_port_alt_hash, dst_port_alt_hash # + ports_source # # The port list can be one to eight entries. # # Example: # # wccp2_service_info 80 protocol=tcp flags=src_ip_hash,ports_source # priority=240 ports=80 # # Note: the service id must have been defined by a previous # 'wccp2_service dynamic ' entry. #Default: # none # TAG: wccp2_weight # Each cache server gets assigned a set of the destination # hash proportional to their weight. #Default: # wccp2_weight 10000 # TAG: wccp_address # Use this option if you require WCCPv2 to use a specific # interface address. # # The default behavior is to not bind to any specific address. #Default: # Address selected by the operating system. # TAG: wccp2_address # Use this option if you require WCCP to use a specific # interface address. # # The default behavior is to not bind to any specific address. #Default: # Address selected by the operating system. # PERSISTENT CONNECTION HANDLING # ----------------------------------------------------------------------------- # # Also see "pconn_timeout" in the TIMEOUTS section # TAG: client_persistent_connections # Persistent connection support for clients. # Squid uses persistent connections (when allowed). You can use # this option to disable persistent connections with clients. #Default: # client_persistent_connections on # TAG: server_persistent_connections # Persistent connection support for servers. # Squid uses persistent connections (when allowed). You can use # this option to disable persistent connections with servers. #Default: # server_persistent_connections on # TAG: persistent_connection_after_error # With this directive the use of persistent connections after # HTTP errors can be disabled. Useful if you have clients # who fail to handle errors on persistent connections proper. #Default: # persistent_connection_after_error on # TAG: detect_broken_pconn # Some servers have been found to incorrectly signal the use # of HTTP/1.0 persistent connections even on replies not # compatible, causing significant delays. This server problem # has mostly been seen on redirects. # # By enabling this directive Squid attempts to detect such # broken replies and automatically assume the reply is finished # after 10 seconds timeout. #Default: # detect_broken_pconn off # CACHE DIGEST OPTIONS # ----------------------------------------------------------------------------- # TAG: digest_generation # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests # # This controls whether the server will generate a Cache Digest # of its contents. By default, Cache Digest generation is # enabled if Squid is compiled with --enable-cache-digests defined. #Default: # digest_generation on # TAG: digest_bits_per_entry # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests # # This is the number of bits of the server's Cache Digest which # will be associated with the Digest entry for a given HTTP # Method and URL (public key) combination. The default is 5. #Default: # digest_bits_per_entry 5 # TAG: digest_rebuild_period (seconds) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests # # This is the wait time between Cache Digest rebuilds. #Default: # digest_rebuild_period 1 hour # TAG: digest_rewrite_period (seconds) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests # # This is the wait time between Cache Digest writes to # disk. #Default: # digest_rewrite_period 1 hour # TAG: digest_swapout_chunk_size (bytes) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests # # This is the number of bytes of the Cache Digest to write to # disk at a time. It defaults to 4096 bytes (4KB), the Squid # default swap page. #Default: # digest_swapout_chunk_size 4096 bytes # TAG: digest_rebuild_chunk_percentage (percent, 0-100) # Note: This option is only available if Squid is rebuilt with the # --enable-cache-digests # # This is the percentage of the Cache Digest to be scanned at a # time. By default it is set to 10% of the Cache Digest. #Default: # digest_rebuild_chunk_percentage 10 # SNMP OPTIONS # ----------------------------------------------------------------------------- # TAG: snmp_port # The port number where Squid listens for SNMP requests. To enable # SNMP support set this to a suitable port number. Port number # 3401 is often used for the Squid SNMP agent. By default it's # set to "0" (disabled) # # Example: # snmp_port 3401 #Default: # SNMP disabled. # TAG: snmp_access # Allowing or denying access to the SNMP port. # # All access to the agent is denied by default. # usage: # # snmp_access allow|deny [!]aclname ... # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # #Example: # snmp_access allow snmppublic localhost # snmp_access deny all #Default: # Deny, unless rules exist in squid.conf. # TAG: snmp_incoming_address # Just like 'udp_incoming_address', but for the SNMP port. # # snmp_incoming_address is used for the SNMP socket receiving # messages from SNMP agents. # # The default snmp_incoming_address is to listen on all # available network interfaces. #Default: # Accept SNMP packets from all machine interfaces. # TAG: snmp_outgoing_address # Just like 'udp_outgoing_address', but for the SNMP port. # # snmp_outgoing_address is used for SNMP packets returned to SNMP # agents. # # If snmp_outgoing_address is not set it will use the same socket # as snmp_incoming_address. Only change this if you want to have # SNMP replies sent using another address than where this Squid # listens for SNMP queries. # # NOTE, snmp_incoming_address and snmp_outgoing_address can not have # the same value since they both use the same port. #Default: # Use snmp_incoming_address or an address selected by the operating system. # ICP OPTIONS # ----------------------------------------------------------------------------- # TAG: icp_port # The port number where Squid sends and receives ICP queries to # and from neighbor caches. The standard UDP port for ICP is 3130. # # Example: # icp_port 3130 #Default: # ICP disabled. # TAG: htcp_port # The port number where Squid sends and receives HTCP queries to # and from neighbor caches. To turn it on you want to set it to # 4827. # # Example: # htcp_port 4827 #Default: # HTCP disabled. # TAG: log_icp_queries on|off # If set, ICP queries are logged to access.log. You may wish # do disable this if your ICP load is VERY high to speed things # up or to simplify log analysis. #Default: # log_icp_queries on log_icp_queries off # TAG: udp_incoming_address # udp_incoming_address is used for UDP packets received from other # caches. # # The default behavior is to not bind to any specific address. # # Only change this if you want to have all UDP queries received on # a specific interface/address. # # NOTE: udp_incoming_address is used by the ICP, HTCP, and DNS # modules. Altering it will affect all of them in the same manner. # # see also; udp_outgoing_address # # NOTE, udp_incoming_address and udp_outgoing_address can not # have the same value since they both use the same port. #Default: # Accept packets from all machine interfaces. # TAG: udp_outgoing_address # udp_outgoing_address is used for UDP packets sent out to other # caches. # # The default behavior is to not bind to any specific address. # # Instead it will use the same socket as udp_incoming_address. # Only change this if you want to have UDP queries sent using another # address than where this Squid listens for UDP queries from other # caches. # # NOTE: udp_outgoing_address is used by the ICP, HTCP, and DNS # modules. Altering it will affect all of them in the same manner. # # see also; udp_incoming_address # # NOTE, udp_incoming_address and udp_outgoing_address can not # have the same value since they both use the same port. #Default: # Use udp_incoming_address or an address selected by the operating system. # TAG: icp_hit_stale on|off # If you want to return ICP_HIT for stale cache objects, set this # option to 'on'. If you have sibling relationships with caches # in other administrative domains, this should be 'off'. If you only # have sibling relationships with caches under your control, # it is probably okay to set this to 'on'. # If set to 'on', your siblings should use the option "allow-miss" # on their cache_peer lines for connecting to you. #Default: # icp_hit_stale off # TAG: minimum_direct_hops # If using the ICMP pinging stuff, do direct fetches for sites # which are no more than this many hops away. #Default: # minimum_direct_hops 4 # TAG: minimum_direct_rtt (msec) # If using the ICMP pinging stuff, do direct fetches for sites # which are no more than this many rtt milliseconds away. #Default: # minimum_direct_rtt 400 # TAG: netdb_low # The low water mark for the ICMP measurement database. # # Note: high watermark controlled by netdb_high directive. # # These watermarks are counts, not percents. The defaults are # (low) 900 and (high) 1000. When the high water mark is # reached, database entries will be deleted until the low # mark is reached. #Default: # netdb_low 900 # TAG: netdb_high # The high water mark for the ICMP measurement database. # # Note: low watermark controlled by netdb_low directive. # # These watermarks are counts, not percents. The defaults are # (low) 900 and (high) 1000. When the high water mark is # reached, database entries will be deleted until the low # mark is reached. #Default: # netdb_high 1000 # TAG: netdb_ping_period # The minimum period for measuring a site. There will be at # least this much delay between successive pings to the same # network. The default is five minutes. #Default: # netdb_ping_period 5 minutes # TAG: query_icmp on|off # If you want to ask your peers to include ICMP data in their ICP # replies, enable this option. # # If your peer has configured Squid (during compilation) with # '--enable-icmp' that peer will send ICMP pings to origin server # sites of the URLs it receives. If you enable this option the # ICP replies from that peer will include the ICMP data (if available). # Then, when choosing a parent cache, Squid will choose the parent with # the minimal RTT to the origin server. When this happens, the # hierarchy field of the access.log will be # "CLOSEST_PARENT_MISS". This option is off by default. #Default: # query_icmp off # TAG: test_reachability on|off # When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH # instead of ICP_MISS if the target host is NOT in the ICMP # database, or has a zero RTT. #Default: # test_reachability off # TAG: icp_query_timeout (msec) # Normally Squid will automatically determine an optimal ICP # query timeout value based on the round-trip-time of recent ICP # queries. If you want to override the value determined by # Squid, set this 'icp_query_timeout' to a non-zero value. This # value is specified in MILLISECONDS, so, to use a 2-second # timeout (the old default), you would write: # # icp_query_timeout 2000 #Default: # Dynamic detection. # TAG: maximum_icp_query_timeout (msec) # Normally the ICP query timeout is determined dynamically. But # sometimes it can lead to very large values (say 5 seconds). # Use this option to put an upper limit on the dynamic timeout # value. Do NOT use this option to always use a fixed (instead # of a dynamic) timeout value. To set a fixed timeout see the # 'icp_query_timeout' directive. #Default: # maximum_icp_query_timeout 2000 # TAG: minimum_icp_query_timeout (msec) # Normally the ICP query timeout is determined dynamically. But # sometimes it can lead to very small timeouts, even lower than # the normal latency variance on your link due to traffic. # Use this option to put an lower limit on the dynamic timeout # value. Do NOT use this option to always use a fixed (instead # of a dynamic) timeout value. To set a fixed timeout see the # 'icp_query_timeout' directive. #Default: # minimum_icp_query_timeout 5 # TAG: background_ping_rate time-units # Controls how often the ICP pings are sent to siblings that # have background-ping set. #Default: # background_ping_rate 10 seconds # MULTICAST ICP OPTIONS # ----------------------------------------------------------------------------- # TAG: mcast_groups # This tag specifies a list of multicast groups which your server # should join to receive multicasted ICP queries. # # NOTE! Be very careful what you put here! Be sure you # understand the difference between an ICP _query_ and an ICP # _reply_. This option is to be set only if you want to RECEIVE # multicast queries. Do NOT set this option to SEND multicast # ICP (use cache_peer for that). ICP replies are always sent via # unicast, so this option does not affect whether or not you will # receive replies from multicast group members. # # You must be very careful to NOT use a multicast address which # is already in use by another group of caches. # # If you are unsure about multicast, please read the Multicast # chapter in the Squid FAQ (http://www.squid-cache.org/FAQ/). # # Usage: mcast_groups 239.128.16.128 224.0.1.20 # # By default, Squid doesn't listen on any multicast groups. #Default: # none # TAG: mcast_miss_addr # Note: This option is only available if Squid is rebuilt with the # -DMULTICAST_MISS_STREAM define # # If you enable this option, every "cache miss" URL will # be sent out on the specified multicast address. # # Do not enable this option unless you are are absolutely # certain you understand what you are doing. #Default: # disabled. # TAG: mcast_miss_ttl # Note: This option is only available if Squid is rebuilt with the # -DMULTICAST_MISS_STREAM define # # This is the time-to-live value for packets multicasted # when multicasting off cache miss URLs is enabled. By # default this is set to 'site scope', i.e. 16. #Default: # mcast_miss_ttl 16 # TAG: mcast_miss_port # Note: This option is only available if Squid is rebuilt with the # -DMULTICAST_MISS_STREAM define # # This is the port number to be used in conjunction with # 'mcast_miss_addr'. #Default: # mcast_miss_port 3135 # TAG: mcast_miss_encode_key # Note: This option is only available if Squid is rebuilt with the # -DMULTICAST_MISS_STREAM define # # The URLs that are sent in the multicast miss stream are # encrypted. This is the encryption key. #Default: # mcast_miss_encode_key XXXXXXXXXXXXXXXX # TAG: mcast_icp_query_timeout (msec) # For multicast peers, Squid regularly sends out ICP "probes" to # count how many other peers are listening on the given multicast # address. This value specifies how long Squid should wait to # count all the replies. The default is 2000 msec, or 2 # seconds. #Default: # mcast_icp_query_timeout 2000 # INTERNAL ICON OPTIONS # ----------------------------------------------------------------------------- # TAG: icon_directory # Where the icons are stored. These are normally kept in # /opt/local/share/squid/icons #Default: # icon_directory /opt/local/share/squid/icons # TAG: global_internal_static # This directive controls is Squid should intercept all requests for # /squid-internal-static/ no matter which host the URL is requesting # (default on setting), or if nothing special should be done for # such URLs (off setting). The purpose of this directive is to make # icons etc work better in complex cache hierarchies where it may # not always be possible for all corners in the cache mesh to reach # the server generating a directory listing. #Default: # global_internal_static on # TAG: short_icon_urls # If this is enabled Squid will use short URLs for icons. # If disabled it will revert to the old behavior of including # it's own name and port in the URL. # # If you run a complex cache hierarchy with a mix of Squid and # other proxies you may need to disable this directive. #Default: # short_icon_urls on # ERROR PAGE OPTIONS # ----------------------------------------------------------------------------- # TAG: error_directory # If you wish to create your own versions of the default # error files to customize them to suit your company copy # the error/template files to another directory and point # this tag at them. # # WARNING: This option will disable multi-language support # on error pages if used. # # The squid developers are interested in making squid available in # a wide variety of languages. If you are making translations for a # language that Squid does not currently provide please consider # contributing your translation back to the project. # http://wiki.squid-cache.org/Translations # # The squid developers working on translations are happy to supply drop-in # translated error files in exchange for any new language contributions. #Default: # Send error pages in the clients preferred language # TAG: error_default_language # Set the default language which squid will send error pages in # if no existing translation matches the clients language # preferences. # # If unset (default) generic English will be used. # # The squid developers are interested in making squid available in # a wide variety of languages. If you are interested in making # translations for any language see the squid wiki for details. # http://wiki.squid-cache.org/Translations #Default: # Generate English language pages. # TAG: error_log_languages # Log to cache.log what languages users are attempting to # auto-negotiate for translations. # # Successful negotiations are not logged. Only failures # have meaning to indicate that Squid may need an upgrade # of its error page translations. #Default: # error_log_languages on # TAG: err_page_stylesheet # CSS Stylesheet to pattern the display of Squid default error pages. # # For information on CSS see http://www.w3.org/Style/CSS/ #Default: # err_page_stylesheet /opt/local/etc/squid/errorpage.css # TAG: err_html_text # HTML text to include in error messages. Make this a "mailto" # URL to your admin address, or maybe just a link to your # organizations Web page. # # To include this in your error messages, you must rewrite # the error template files (found in the "errors" directory). # Wherever you want the 'err_html_text' line to appear, # insert a %L tag in the error template file. #Default: # none # TAG: email_err_data on|off # If enabled, information about the occurred error will be # included in the mailto links of the ERR pages (if %W is set) # so that the email body contains the data. # Syntax is %w #Default: # email_err_data on # TAG: deny_info # Usage: deny_info err_page_name acl # or deny_info http://... acl # or deny_info TCP_RESET acl # # This can be used to return a ERR_ page for requests which # do not pass the 'http_access' rules. Squid remembers the last # acl it evaluated in http_access, and if a 'deny_info' line exists # for that ACL Squid returns a corresponding error page. # # The acl is typically the last acl on the http_access deny line which # denied access. The exceptions to this rule are: # - When Squid needs to request authentication credentials. It's then # the first authentication related acl encountered # - When none of the http_access lines matches. It's then the last # acl processed on the last http_access line. # - When the decision to deny access was made by an adaptation service, # the acl name is the corresponding eCAP or ICAP service_name. # # NP: If providing your own custom error pages with error_directory # you may also specify them by your custom file name: # Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys # # By defaut Squid will send "403 Forbidden". A different 4xx or 5xx # may be specified by prefixing the file name with the code and a colon. # e.g. 404:ERR_CUSTOM_ACCESS_DENIED # # Alternatively you can tell Squid to reset the TCP connection # by specifying TCP_RESET. # # Or you can specify an error URL or URL pattern. The browsers will # get redirected to the specified URL after formatting tags have # been replaced. Redirect will be done with 302 or 307 according to # HTTP/1.1 specs. A different 3xx code may be specified by prefixing # the URL. e.g. 303:http://example.com/ # # URL FORMAT TAGS: # %a - username (if available. Password NOT included) # %B - FTP path URL # %e - Error number # %E - Error description # %h - Squid hostname # %H - Request domain name # %i - Client IP Address # %M - Request Method # %O - Unescaped message result from external ACL helper # %o - Message result from external ACL helper # %p - Request Port number # %P - Request Protocol name # %R - Request URL path # %T - Timestamp in RFC 1123 format # %U - Full canonical URL from client # (HTTPS URLs terminate with *) # %u - Full canonical URL from client # %w - Admin email from squid.conf # %x - Error name # %% - Literal percent (%) code # #Default: # none # OPTIONS INFLUENCING REQUEST FORWARDING # ----------------------------------------------------------------------------- # TAG: nonhierarchical_direct # By default, Squid will send any non-hierarchical requests # (not cacheable request type) direct to origin servers. # # When this is set to "off", Squid will prefer to send these # requests to parents. # # Note that in most configurations, by turning this off you will only # add latency to these request without any improvement in global hit # ratio. # # This option only sets a preference. If the parent is unavailable a # direct connection to the origin server may still be attempted. To # completely prevent direct connections use never_direct. #Default: # nonhierarchical_direct on # TAG: prefer_direct # Normally Squid tries to use parents for most requests. If you for some # reason like it to first try going direct and only use a parent if # going direct fails set this to on. # # By combining nonhierarchical_direct off and prefer_direct on you # can set up Squid to use a parent as a backup path if going direct # fails. # # Note: If you want Squid to use parents for all requests see # the never_direct directive. prefer_direct only modifies how Squid # acts on cacheable requests. #Default: # prefer_direct off # TAG: cache_miss_revalidate on|off # RFC 7232 defines a conditional request mechanism to prevent # response objects being unnecessarily transferred over the network. # If that mechanism is used by the client and a cache MISS occurs # it can prevent new cache entries being created. # # This option determines whether Squid on cache MISS will pass the # client revalidation request to the server or tries to fetch new # content for caching. It can be useful while the cache is mostly # empty to more quickly have the cache populated by generating # non-conditional GETs. # # When set to 'on' (default), Squid will pass all client If-* headers # to the server. This permits server responses without a cacheable # payload to be delivered and on MISS no new cache entry is created. # # When set to 'off' and if the request is cacheable, Squid will # remove the clients If-Modified-Since and If-None-Match headers from # the request sent to the server. This requests a 200 status response # from the server to create a new cache entry with. #Default: # cache_miss_revalidate on # TAG: always_direct # Usage: always_direct allow|deny [!]aclname ... # # Here you can use ACL elements to specify requests which should # ALWAYS be forwarded by Squid to the origin servers without using # any peers. For example, to always directly forward requests for # local servers ignoring any parents or siblings you may have use # something like: # # acl local-servers dstdomain my.domain.net # always_direct allow local-servers # # To always forward FTP requests directly, use # # acl FTP proto FTP # always_direct allow FTP # # NOTE: There is a similar, but opposite option named # 'never_direct'. You need to be aware that "always_direct deny # foo" is NOT the same thing as "never_direct allow foo". You # may need to use a deny rule to exclude a more-specific case of # some other rule. Example: # # acl local-external dstdomain external.foo.net # acl local-servers dstdomain .foo.net # always_direct deny local-external # always_direct allow local-servers # # NOTE: If your goal is to make the client forward the request # directly to the origin server bypassing Squid then this needs # to be done in the client configuration. Squid configuration # can only tell Squid how Squid should fetch the object. # # NOTE: This directive is not related to caching. The replies # is cached as usual even if you use always_direct. To not cache # the replies see the 'cache' directive. # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Prevent any cache_peer being used for this request. # Do not send AWS requests through Privoxy acl aws-domains dstdomain \ .aws.amazon.com \ .cloudfront.net always_direct allow aws-domains # See http://www.privoxy.org/user-manual/config.html # Define ACL for protocol FTP acl ftp proto FTP always_direct allow ftp # Direct to specified domain names #acl mydomainname dstdomain .mydomainname.com #always_direct allow mydomainname # Do not forward SSL requests to Privoxy #always_direct allow SSL_ports # TAG: never_direct # Usage: never_direct allow|deny [!]aclname ... # # never_direct is the opposite of always_direct. Please read # the description for always_direct if you have not already. # # With 'never_direct' you can use ACL elements to specify # requests which should NEVER be forwarded directly to origin # servers. For example, to force the use of a proxy for all # requests, except those in your local domain use something like: # # acl local-servers dstdomain .foo.net # never_direct deny local-servers # never_direct allow all # # or if Squid is inside a firewall and there are local intranet # servers inside the firewall use something like: # # acl local-intranet dstdomain .foo.net # acl local-external dstdomain external.foo.net # always_direct deny local-external # always_direct allow local-intranet # never_direct allow all # # This clause supports both fast and slow acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. #Default: # Allow DNS results to be used for this request. # See http://www.privoxy.org/user-manual/config.html # Forward all the rest to Privoxy never_direct allow all # ADVANCED NETWORKING OPTIONS # ----------------------------------------------------------------------------- # TAG: incoming_udp_average # Heavy voodoo here. I can't even believe you are reading this. # Are you crazy? Don't even think about adjusting these unless # you understand the algorithms in comm_select.c first! #Default: # incoming_udp_average 6 # TAG: incoming_tcp_average # Heavy voodoo here. I can't even believe you are reading this. # Are you crazy? Don't even think about adjusting these unless # you understand the algorithms in comm_select.c first! #Default: # incoming_tcp_average 4 # TAG: incoming_dns_average # Heavy voodoo here. I can't even believe you are reading this. # Are you crazy? Don't even think about adjusting these unless # you understand the algorithms in comm_select.c first! #Default: # incoming_dns_average 4 # TAG: min_udp_poll_cnt # Heavy voodoo here. I can't even believe you are reading this. # Are you crazy? Don't even think about adjusting these unless # you understand the algorithms in comm_select.c first! #Default: # min_udp_poll_cnt 8 # TAG: min_dns_poll_cnt # Heavy voodoo here. I can't even believe you are reading this. # Are you crazy? Don't even think about adjusting these unless # you understand the algorithms in comm_select.c first! #Default: # min_dns_poll_cnt 8 # TAG: min_tcp_poll_cnt # Heavy voodoo here. I can't even believe you are reading this. # Are you crazy? Don't even think about adjusting these unless # you understand the algorithms in comm_select.c first! #Default: # min_tcp_poll_cnt 8 # TAG: accept_filter # FreeBSD: # # The name of an accept(2) filter to install on Squid's # listen socket(s). This feature is perhaps specific to # FreeBSD and requires support in the kernel. # # The 'httpready' filter delays delivering new connections # to Squid until a full HTTP request has been received. # See the accf_http(9) man page for details. # # The 'dataready' filter delays delivering new connections # to Squid until there is some data to process. # See the accf_dataready(9) man page for details. # # Linux: # # The 'data' filter delays delivering of new connections # to Squid until there is some data to process by TCP_ACCEPT_DEFER. # You may optionally specify a number of seconds to wait by # 'data=N' where N is the number of seconds. Defaults to 30 # if not specified. See the tcp(7) man page for details. #EXAMPLE: ## FreeBSD #accept_filter httpready ## Linux #accept_filter data #Default: # none # TAG: client_ip_max_connections # Set an absolute limit on the number of connections a single # client IP can use. Any more than this and Squid will begin to drop # new connections from the client until it closes some links. # # Note that this is a global limit. It affects all HTTP, HTCP, Gopher and FTP # connections from the client. For finer control use the ACL access controls. # # Requires client_db to be enabled (the default). # # WARNING: This may noticably slow down traffic received via external proxies # or NAT devices and cause them to rebound error messages back to their clients. #Default: # No limit. # TAG: tcp_recv_bufsize (bytes) # Size of receive buffer to set for TCP sockets. Probably just # as easy to change your kernel's default. # Omit from squid.conf to use the default buffer size. #Default: # Use operating system TCP defaults. # ICAP OPTIONS # ----------------------------------------------------------------------------- # TAG: icap_enable on|off # If you want to enable the ICAP module support, set this to on. #Default: # icap_enable off # TAG: icap_connect_timeout # This parameter specifies how long to wait for the TCP connect to # the requested ICAP server to complete before giving up and either # terminating the HTTP transaction or bypassing the failure. # # The default for optional services is peer_connect_timeout. # The default for essential services is connect_timeout. # If this option is explicitly set, its value applies to all services. #Default: # none # TAG: icap_io_timeout time-units # This parameter specifies how long to wait for an I/O activity on # an established, active ICAP connection before giving up and # either terminating the HTTP transaction or bypassing the # failure. #Default: # Use read_timeout. # TAG: icap_service_failure_limit limit [in memory-depth time-units] # The limit specifies the number of failures that Squid tolerates # when establishing a new TCP connection with an ICAP service. If # the number of failures exceeds the limit, the ICAP service is # not used for new ICAP requests until it is time to refresh its # OPTIONS. # # A negative value disables the limit. Without the limit, an ICAP # service will not be considered down due to connectivity failures # between ICAP OPTIONS requests. # # Squid forgets ICAP service failures older than the specified # value of memory-depth. The memory fading algorithm # is approximate because Squid does not remember individual # errors but groups them instead, splitting the option # value into ten time slots of equal length. # # When memory-depth is 0 and by default this option has no # effect on service failure expiration. # # Squid always forgets failures when updating service settings # using an ICAP OPTIONS transaction, regardless of this option # setting. # # For example, # # suspend service usage after 10 failures in 5 seconds: # icap_service_failure_limit 10 in 5 seconds #Default: # icap_service_failure_limit 10 # TAG: icap_service_revival_delay # The delay specifies the number of seconds to wait after an ICAP # OPTIONS request failure before requesting the options again. The # failed ICAP service is considered "down" until fresh OPTIONS are # fetched. # # The actual delay cannot be smaller than the hardcoded minimum # delay of 30 seconds. #Default: # icap_service_revival_delay 180 # TAG: icap_preview_enable on|off # The ICAP Preview feature allows the ICAP server to handle the # HTTP message by looking only at the beginning of the message body # or even without receiving the body at all. In some environments, # previews greatly speedup ICAP processing. # # During an ICAP OPTIONS transaction, the server may tell Squid what # HTTP messages should be previewed and how big the preview should be. # Squid will not use Preview if the server did not request one. # # To disable ICAP Preview for all ICAP services, regardless of # individual ICAP server OPTIONS responses, set this option to "off". #Example: #icap_preview_enable off #Default: # icap_preview_enable on # TAG: icap_preview_size # The default size of preview data to be sent to the ICAP server. # This value might be overwritten on a per server basis by OPTIONS requests. #Default: # No preview sent. # TAG: icap_206_enable on|off # 206 (Partial Content) responses is an ICAP extension that allows the # ICAP agents to optionally combine adapted and original HTTP message # content. The decision to combine is postponed until the end of the # ICAP response. Squid supports Partial Content extension by default. # # Activation of the Partial Content extension is negotiated with each # ICAP service during OPTIONS exchange. Most ICAP servers should handle # negotation correctly even if they do not support the extension, but # some might fail. To disable Partial Content support for all ICAP # services and to avoid any negotiation, set this option to "off". # # Example: # icap_206_enable off #Default: # icap_206_enable on # TAG: icap_default_options_ttl # The default TTL value for ICAP OPTIONS responses that don't have # an Options-TTL header. #Default: # icap_default_options_ttl 60 # TAG: icap_persistent_connections on|off # Whether or not Squid should use persistent connections to # an ICAP server. #Default: # icap_persistent_connections on # TAG: adaptation_send_client_ip on|off # If enabled, Squid shares HTTP client IP information with adaptation # services. For ICAP, Squid adds the X-Client-IP header to ICAP requests. # For eCAP, Squid sets the libecap::metaClientIp transaction option. # # See also: adaptation_uses_indirect_client #Default: # adaptation_send_client_ip off # TAG: adaptation_send_username on|off # This sends authenticated HTTP client username (if available) to # the adaptation service. # # For ICAP, the username value is encoded based on the # icap_client_username_encode option and is sent using the header # specified by the icap_client_username_header option. #Default: # adaptation_send_username off # TAG: icap_client_username_header # ICAP request header name to use for adaptation_send_username. #Default: # icap_client_username_header X-Client-Username # TAG: icap_client_username_encode on|off # Whether to base64 encode the authenticated client username. #Default: # icap_client_username_encode off # TAG: icap_service # Defines a single ICAP service using the following format: # # icap_service id vectoring_point uri [option ...] # # id: ID # an opaque identifier or name which is used to direct traffic to # this specific service. Must be unique among all adaptation # services in squid.conf. # # vectoring_point: reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache # This specifies at which point of transaction processing the # ICAP service should be activated. *_postcache vectoring points # are not yet supported. # # uri: icap://servername:port/servicepath # ICAP server and service location. # icaps://servername:port/servicepath # The "icap:" URI scheme is used for traditional ICAP server and # service location (default port is 1344, connections are not # encrypted). The "icaps:" URI scheme is for Secure ICAP # services that use SSL/TLS-encrypted ICAP connections (by # default, on port 11344). # # ICAP does not allow a single service to handle both REQMOD and RESPMOD # transactions. Squid does not enforce that requirement. You can specify # services with the same service_url and different vectoring_points. You # can even specify multiple identical services as long as their # service_names differ. # # To activate a service, use the adaptation_access directive. To group # services, use adaptation_service_chain and adaptation_service_set. # # Service options are separated by white space. ICAP services support # the following name=value options: # # bypass=on|off|1|0 # If set to 'on' or '1', the ICAP service is treated as # optional. If the service cannot be reached or malfunctions, # Squid will try to ignore any errors and process the message as # if the service was not enabled. No all ICAP errors can be # bypassed. If set to 0, the ICAP service is treated as # essential and all ICAP errors will result in an error page # returned to the HTTP client. # # Bypass is off by default: services are treated as essential. # # routing=on|off|1|0 # If set to 'on' or '1', the ICAP service is allowed to # dynamically change the current message adaptation plan by # returning a chain of services to be used next. The services # are specified using the X-Next-Services ICAP response header # value, formatted as a comma-separated list of service names. # Each named service should be configured in squid.conf. Other # services are ignored. An empty X-Next-Services value results # in an empty plan which ends the current adaptation. # # Dynamic adaptation plan may cross or cover multiple supported # vectoring points in their natural processing order. # # Routing is not allowed by default: the ICAP X-Next-Services # response header is ignored. # # ipv6=on|off # Only has effect on split-stack systems. The default on those systems # is to use IPv4-only connections. When set to 'on' this option will # make Squid use IPv6-only connections to contact this ICAP service. # # on-overload=block|bypass|wait|force # If the service Max-Connections limit has been reached, do # one of the following for each new ICAP transaction: # * block: send an HTTP error response to the client # * bypass: ignore the "over-connected" ICAP service # * wait: wait (in a FIFO queue) for an ICAP connection slot # * force: proceed, ignoring the Max-Connections limit # # In SMP mode with N workers, each worker assumes the service # connection limit is Max-Connections/N, even though not all # workers may use a given service. # # The default value is "bypass" if service is bypassable, # otherwise it is set to "wait". # # # max-conn=number # Use the given number as the Max-Connections limit, regardless # of the Max-Connections value given by the service, if any. # # connection-encryption=on|off # Determines the ICAP service effect on the connections_encrypted # ACL. # # The default is "on" for Secure ICAP services (i.e., those # with the icaps:// service URIs scheme) and "off" for plain ICAP # services. # # Does not affect ICAP connections (e.g., does not turn Secure # ICAP on or off). # # ==== ICAPS / TLS OPTIONS ==== # # These options are used for Secure ICAP (icaps://....) services only. # # tls-cert=/path/to/ssl/certificate # A client X.509 certificate to use when connecting to # this ICAP server. # # tls-key=/path/to/ssl/key # The private key corresponding to the previous # tls-cert= option. # # If tls-key= is not specified tls-cert= is assumed to # reference a PEM file containing both the certificate # and private key. # # tls-cipher=... The list of valid TLS/SSL ciphers to use when connecting # to this icap server. # # tls-min-version=1.N # The minimum TLS protocol version to permit. To control # SSLv3 use the tls-options= parameter. # Supported Values: 1.0 (default), 1.1, 1.2 # # tls-options=... Specify various OpenSSL library options: # # NO_SSLv3 Disallow the use of SSLv3 # # SINGLE_DH_USE # Always create a new key when using # temporary/ephemeral DH key exchanges # # ALL Enable various bug workarounds # suggested as "harmless" by OpenSSL # Be warned that this reduces SSL/TLS # strength to some attacks. # # See the OpenSSL SSL_CTX_set_options documentation for a # more complete list. Options relevant only to SSLv2 are # not supported. # # tls-cafile= PEM file containing CA certificates to use when verifying # the icap server certificate. # Use to specify intermediate CA certificate(s) if not sent # by the server. Or the full CA chain for the server when # using the tls-default-ca=off flag. # May be repeated to load multiple files. # # tls-capath=... A directory containing additional CA certificates to # use when verifying the icap server certificate. # Requires OpenSSL or LibreSSL. # # tls-crlfile=... A certificate revocation list file to use when # verifying the icap server certificate. # # tls-flags=... Specify various flags modifying the Squid TLS implementation: # # DONT_VERIFY_PEER # Accept certificates even if they fail to # verify. # DONT_VERIFY_DOMAIN # Don't verify the icap server certificate # matches the server name # # tls-default-ca[=off] # Whether to use the system Trusted CAs. Default is ON. # # tls-domain= The icap server name as advertised in it's certificate. # Used for verifying the correctness of the received icap # server certificate. If not specified the icap server # hostname extracted from ICAP URI will be used. # # Older icap_service format without optional named parameters is # deprecated but supported for backward compatibility. # #Example: #icap_service svcBlocker reqmod_precache icap://icap1.mydomain.net:1344/reqmod bypass=0 #icap_service svcLogger reqmod_precache icaps://icap2.mydomain.net:11344/reqmod routing=on #Default: # none # TAG: icap_class # This deprecated option was documented to define an ICAP service # chain, even though it actually defined a set of similar, redundant # services, and the chains were not supported. # # To define a set of redundant services, please use the # adaptation_service_set directive. For service chains, use # adaptation_service_chain. #Default: # none # TAG: icap_access # This option is deprecated. Please use adaptation_access, which # has the same ICAP functionality, but comes with better # documentation, and eCAP support. #Default: # none # eCAP OPTIONS # ----------------------------------------------------------------------------- # TAG: ecap_enable on|off # Note: This option is only available if Squid is rebuilt with the # --enable-ecap # # Controls whether eCAP support is enabled. #Default: # ecap_enable off # TAG: ecap_service # Note: This option is only available if Squid is rebuilt with the # --enable-ecap # # Defines a single eCAP service # # ecap_service id vectoring_point uri [option ...] # # id: ID # an opaque identifier or name which is used to direct traffic to # this specific service. Must be unique among all adaptation # services in squid.conf. # # vectoring_point: reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache # This specifies at which point of transaction processing the # eCAP service should be activated. *_postcache vectoring points # are not yet supported. # # uri: ecap://vendor/service_name?custom&cgi=style¶meters=optional # Squid uses the eCAP service URI to match this configuration # line with one of the dynamically loaded services. Each loaded # eCAP service must have a unique URI. Obtain the right URI from # the service provider. # # To activate a service, use the adaptation_access directive. To group # services, use adaptation_service_chain and adaptation_service_set. # # Service options are separated by white space. eCAP services support # the following name=value options: # # bypass=on|off|1|0 # If set to 'on' or '1', the eCAP service is treated as optional. # If the service cannot be reached or malfunctions, Squid will try # to ignore any errors and process the message as if the service # was not enabled. No all eCAP errors can be bypassed. # If set to 'off' or '0', the eCAP service is treated as essential # and all eCAP errors will result in an error page returned to the # HTTP client. # # Bypass is off by default: services are treated as essential. # # routing=on|off|1|0 # If set to 'on' or '1', the eCAP service is allowed to # dynamically change the current message adaptation plan by # returning a chain of services to be used next. # # Dynamic adaptation plan may cross or cover multiple supported # vectoring points in their natural processing order. # # Routing is not allowed by default. # # connection-encryption=on|off # Determines the eCAP service effect on the connections_encrypted # ACL. # # Defaults to "on", which does not taint the master transaction # w.r.t. that ACL. # # Does not affect eCAP API calls. # # Older ecap_service format without optional named parameters is # deprecated but supported for backward compatibility. # # #Example: #ecap_service s1 reqmod_precache ecap://filters.R.us/leakDetector?on_error=block bypass=off #ecap_service s2 respmod_precache ecap://filters.R.us/virusFilter config=/etc/vf.cfg bypass=on #Default: # none # TAG: loadable_modules # Note: This option is only available if Squid is rebuilt with the # --enable-loadable-modules # # Instructs Squid to load the specified dynamic module(s) or activate # preloaded module(s). #Example: #loadable_modules /opt/local/lib/MinimalAdapter.so #Default: # none # MESSAGE ADAPTATION OPTIONS # ----------------------------------------------------------------------------- # TAG: adaptation_service_set # # Configures an ordered set of similar, redundant services. This is # useful when hot standby or backup adaptation servers are available. # # adaptation_service_set set_name service_name1 service_name2 ... # # The named services are used in the set declaration order. The first # applicable adaptation service from the set is used first. The next # applicable service is tried if and only if the transaction with the # previous service fails and the message waiting to be adapted is still # intact. # # When adaptation starts, broken services are ignored as if they were # not a part of the set. A broken service is a down optional service. # # The services in a set must be attached to the same vectoring point # (e.g., pre-cache) and use the same adaptation method (e.g., REQMOD). # # If all services in a set are optional then adaptation failures are # bypassable. If all services in the set are essential, then a # transaction failure with one service may still be retried using # another service from the set, but when all services fail, the master # transaction fails as well. # # A set may contain a mix of optional and essential services, but that # is likely to lead to surprising results because broken services become # ignored (see above), making previously bypassable failures fatal. # Technically, it is the bypassability of the last failed service that # matters. # # See also: adaptation_access adaptation_service_chain # #Example: #adaptation_service_set svcBlocker urlFilterPrimary urlFilterBackup #adaptation service_set svcLogger loggerLocal loggerRemote #Default: # none # TAG: adaptation_service_chain # # Configures a list of complementary services that will be applied # one-by-one, forming an adaptation chain or pipeline. This is useful # when Squid must perform different adaptations on the same message. # # adaptation_service_chain chain_name service_name1 svc_name2 ... # # The named services are used in the chain declaration order. The first # applicable adaptation service from the chain is used first. The next # applicable service is applied to the successful adaptation results of # the previous service in the chain. # # When adaptation starts, broken services are ignored as if they were # not a part of the chain. A broken service is a down optional service. # # Request satisfaction terminates the adaptation chain because Squid # does not currently allow declaration of RESPMOD services at the # "reqmod_precache" vectoring point (see icap_service or ecap_service). # # The services in a chain must be attached to the same vectoring point # (e.g., pre-cache) and use the same adaptation method (e.g., REQMOD). # # A chain may contain a mix of optional and essential services. If an # essential adaptation fails (or the failure cannot be bypassed for # other reasons), the master transaction fails. Otherwise, the failure # is bypassed as if the failed adaptation service was not in the chain. # # See also: adaptation_access adaptation_service_set # #Example: #adaptation_service_chain svcRequest requestLogger urlFilter leakDetector #Default: # none # TAG: adaptation_access # Sends an HTTP transaction to an ICAP or eCAP adaptation service. # # adaptation_access service_name allow|deny [!]aclname... # adaptation_access set_name allow|deny [!]aclname... # # At each supported vectoring point, the adaptation_access # statements are processed in the order they appear in this # configuration file. Statements pointing to the following services # are ignored (i.e., skipped without checking their ACL): # # - services serving different vectoring points # - "broken-but-bypassable" services # - "up" services configured to ignore such transactions # (e.g., based on the ICAP Transfer-Ignore header). # # When a set_name is used, all services in the set are checked # using the same rules, to find the first applicable one. See # adaptation_service_set for details. # # If an access list is checked and there is a match, the # processing stops: For an "allow" rule, the corresponding # adaptation service is used for the transaction. For a "deny" # rule, no adaptation service is activated. # # It is currently not possible to apply more than one adaptation # service at the same vectoring point to the same HTTP transaction. # # See also: icap_service and ecap_service # #Example: #adaptation_access service_1 allow all #Default: # Allow, unless rules exist in squid.conf. # TAG: adaptation_service_iteration_limit # Limits the number of iterations allowed when applying adaptation # services to a message. If your longest adaptation set or chain # may have more than 16 services, increase the limit beyond its # default value of 16. If detecting infinite iteration loops sooner # is critical, make the iteration limit match the actual number # of services in your longest adaptation set or chain. # # Infinite adaptation loops are most likely with routing services. # # See also: icap_service routing=1 #Default: # adaptation_service_iteration_limit 16 # TAG: adaptation_masterx_shared_names # For each master transaction (i.e., the HTTP request and response # sequence, including all related ICAP and eCAP exchanges), Squid # maintains a table of metadata. The table entries are (name, value) # pairs shared among eCAP and ICAP exchanges. The table is destroyed # with the master transaction. # # This option specifies the table entry names that Squid must accept # from and forward to the adaptation transactions. # # An ICAP REQMOD or RESPMOD transaction may set an entry in the # shared table by returning an ICAP header field with a name # specified in adaptation_masterx_shared_names. # # An eCAP REQMOD or RESPMOD transaction may set an entry in the # shared table by implementing the libecap::visitEachOption() API # to provide an option with a name specified in # adaptation_masterx_shared_names. # # Squid will store and forward the set entry to subsequent adaptation # transactions within the same master transaction scope. # # Only one shared entry name is supported at this time. # #Example: ## share authentication information among ICAP services #adaptation_masterx_shared_names X-Subscriber-ID #Default: # none # TAG: adaptation_meta # This option allows Squid administrator to add custom ICAP request # headers or eCAP options to Squid ICAP requests or eCAP transactions. # Use it to pass custom authentication tokens and other # transaction-state related meta information to an ICAP/eCAP service. # # The addition of a meta header is ACL-driven: # adaptation_meta name value [!]aclname ... # # Processing for a given header name stops after the first ACL list match. # Thus, it is impossible to add two headers with the same name. If no ACL # lists match for a given header name, no such header is added. For # example: # # # do not debug transactions except for those that need debugging # adaptation_meta X-Debug 1 needs_debugging # # # log all transactions except for those that must remain secret # adaptation_meta X-Log 1 !keep_secret # # # mark transactions from users in the "G 1" group # adaptation_meta X-Authenticated-Groups "G 1" authed_as_G1 # # The "value" parameter may be a regular squid.conf token or a "double # quoted string". Within the quoted string, use backslash (\) to escape # any character, which is currently only useful for escaping backslashes # and double quotes. For example, # "this string has one backslash (\\) and two \"quotes\"" # # Used adaptation_meta header values may be logged via %note # logformat code. If multiple adaptation_meta headers with the same name # are used during master transaction lifetime, the header values are # logged in the order they were used and duplicate values are ignored # (only the first repeated value will be logged). #Default: # none # TAG: icap_retry # This ACL determines which retriable ICAP transactions are # retried. Transactions that received a complete ICAP response # and did not have to consume or produce HTTP bodies to receive # that response are usually retriable. # # icap_retry allow|deny [!]aclname ... # # Squid automatically retries some ICAP I/O timeouts and errors # due to persistent connection race conditions. # # See also: icap_retry_limit #Default: # icap_retry deny all # TAG: icap_retry_limit # Limits the number of retries allowed. # # Communication errors due to persistent connection race # conditions are unavoidable, automatically retried, and do not # count against this limit. # # See also: icap_retry #Default: # No retries are allowed. # DNS OPTIONS # ----------------------------------------------------------------------------- # TAG: check_hostnames # For security and stability reasons Squid can check # hostnames for Internet standard RFC compliance. If you want # Squid to perform these checks turn this directive on. #Default: # check_hostnames off # TAG: allow_underscore # Underscore characters is not strictly allowed in Internet hostnames # but nevertheless used by many sites. Set this to off if you want # Squid to be strict about the standard. # This check is performed only when check_hostnames is set to on. #Default: # allow_underscore on # TAG: dns_retransmit_interval # Initial retransmit interval for DNS queries. The interval is # doubled each time all configured DNS servers have been tried. #Default: # dns_retransmit_interval 5 seconds # TAG: dns_timeout # DNS Query timeout. If no response is received to a DNS query # within this time all DNS servers for the queried domain # are assumed to be unavailable. #Default: # dns_timeout 30 seconds # TAG: dns_packet_max # Maximum number of bytes packet size to advertise via EDNS. # Set to "none" to disable EDNS large packet support. # # For legacy reasons DNS UDP replies will default to 512 bytes which # is too small for many responses. EDNS provides a means for Squid to # negotiate receiving larger responses back immediately without having # to failover with repeat requests. Responses larger than this limit # will retain the old behaviour of failover to TCP DNS. # # Squid has no real fixed limit internally, but allowing packet sizes # over 1500 bytes requires network jumbogram support and is usually not # necessary. # # WARNING: The RFC also indicates that some older resolvers will reply # with failure of the whole request if the extension is added. Some # resolvers have already been identified which will reply with mangled # EDNS response on occasion. Usually in response to many-KB jumbogram # sizes being advertised by Squid. # Squid will currently treat these both as an unable-to-resolve domain # even if it would be resolvable without EDNS. #Default: # EDNS disabled # TAG: dns_defnames on|off # Normally the RES_DEFNAMES resolver option is disabled # (see res_init(3)). This prevents caches in a hierarchy # from interpreting single-component hostnames locally. To allow # Squid to handle single-component names, enable this option. #Default: # Search for single-label domain names is disabled. # TAG: dns_multicast_local on|off # When set to on, Squid sends multicast DNS lookups on the local # network for domains ending in .local and .arpa. # This enables local servers and devices to be contacted in an # ad-hoc or zero-configuration network environment. #Default: # Search for .local and .arpa names is disabled. # TAG: dns_nameservers # Use this if you want to specify a list of DNS name servers # (IP addresses) to use instead of those given in your # /etc/resolv.conf file. # # On Windows platforms, if no value is specified here or in # the /etc/resolv.conf file, the list of DNS name servers are # taken from the Windows registry, both static and dynamic DHCP # configurations are supported. # # Example: dns_nameservers 10.0.0.1 192.172.0.4 #Default: # Use operating system definitions # Google DNS dns_nameservers 8.8.8.8 4.4.4.4 # Use LAN IP with possible backup if you're running DNS yourself #dns_nameservers 10.0.1.3 # TAG: hosts_file # Location of the host-local IP name-address associations # database. Most Operating Systems have such a file on different # default locations: # - Un*X & Linux: /etc/hosts # - Windows NT/2000: %SystemRoot%\system32\drivers\etc\hosts # (%SystemRoot% value install default is c:\winnt) # - Windows XP/2003: %SystemRoot%\system32\drivers\etc\hosts # (%SystemRoot% value install default is c:\windows) # - Windows 9x/Me: %windir%\hosts # (%windir% value is usually c:\windows) # - Cygwin: /etc/hosts # # The file contains newline-separated definitions, in the # form ip_address_in_dotted_form name [name ...] names are # whitespace-separated. Lines beginning with an hash (#) # character are comments. # # The file is checked at startup and upon configuration. # If set to 'none', it won't be checked. # If append_domain is used, that domain will be added to # domain-local (i.e. not containing any dot character) host # definitions. #Default: # hosts_file /etc/hosts hosts_file /etc/hosts-hphosts # TAG: append_domain # Appends local domain name to hostnames without any dots in # them. append_domain must begin with a period. # # Be warned there are now Internet names with no dots in # them using only top-domain names, so setting this may # cause some Internet sites to become unavailable. # #Example: # append_domain .yourdomain.com #Default: # Use operating system definitions # TAG: ignore_unknown_nameservers # By default Squid checks that DNS responses are received # from the same IP addresses they are sent to. If they # don't match, Squid ignores the response and writes a warning # message to cache.log. You can allow responses from unknown # nameservers by setting this option to 'off'. #Default: # ignore_unknown_nameservers on # TAG: dns_v4_first # With the IPv6 Internet being as fast or faster than IPv4 Internet # for most networks Squid prefers to contact websites over IPv6. # # This option reverses the order of preference to make Squid contact # dual-stack websites over IPv4 first. Squid will still perform both # IPv6 and IPv4 DNS lookups before connecting. # # WARNING: # This option will restrict the situations under which IPv6 # connectivity is used (and tested). Hiding network problems # which would otherwise be detected and warned about. #Default: # dns_v4_first off # TAG: ipcache_size (number of entries) # Maximum number of DNS IP cache entries. #Default: # ipcache_size 1024 ipcache_size 16384 # TAG: ipcache_low (percent) #Default: # ipcache_low 90 # TAG: ipcache_high (percent) # The size, low-, and high-water marks for the IP cache. #Default: # ipcache_high 95 # TAG: fqdncache_size (number of entries) # Maximum number of FQDN cache entries. #Default: # fqdncache_size 1024 fqdncache_size 1048576 # MISCELLANEOUS # ----------------------------------------------------------------------------- # TAG: configuration_includes_quoted_values on|off # If set, Squid will recognize each "quoted string" after a configuration # directive as a single parameter. The quotes are stripped before the # parameter value is interpreted or used. # See "Values with spaces, quotes, and other special characters" # section for more details. #Default: # configuration_includes_quoted_values off # TAG: memory_pools on|off # If set, Squid will keep pools of allocated (but unused) memory # available for future use. If memory is a premium on your # system and you believe your malloc library outperforms Squid # routines, disable this. #Default: # memory_pools on memory_pools off # TAG: memory_pools_limit (bytes) # Used only with memory_pools on: # memory_pools_limit 50 MB # # If set to a non-zero value, Squid will keep at most the specified # limit of allocated (but unused) memory in memory pools. All free() # requests that exceed this limit will be handled by your malloc # library. Squid does not pre-allocate any memory, just safe-keeps # objects that otherwise would be free()d. Thus, it is safe to set # memory_pools_limit to a reasonably high value even if your # configuration will use less memory. # # If set to none, Squid will keep all memory it can. That is, there # will be no limit on the total amount of memory used for safe-keeping. # # To disable memory allocation optimization, do not set # memory_pools_limit to 0 or none. Set memory_pools to "off" instead. # # An overhead for maintaining memory pools is not taken into account # when the limit is checked. This overhead is close to four bytes per # object kept. However, pools may actually _save_ memory because of # reduced memory thrashing in your malloc library. #Default: # memory_pools_limit 5 MB # TAG: forwarded_for on|off|transparent|truncate|delete # If set to "on", Squid will append your client's IP address # in the HTTP requests it forwards. By default it looks like: # # X-Forwarded-For: 192.1.2.3 # # If set to "off", it will appear as # # X-Forwarded-For: unknown # # If set to "transparent", Squid will not alter the # X-Forwarded-For header in any way. # # If set to "delete", Squid will delete the entire # X-Forwarded-For header. # # If set to "truncate", Squid will remove all existing # X-Forwarded-For entries, and place the client IP as the sole entry. #Default: # forwarded_for on forwarded_for off # TAG: cachemgr_passwd # Specify passwords for cachemgr operations. # # Usage: cachemgr_passwd password action action ... # # Some valid actions are (see cache manager menu for a full list): # 5min # 60min # asndb # authenticator # cbdata # client_list # comm_incoming # config * # counters # delay # digest_stats # dns # events # filedescriptors # fqdncache # histograms # http_headers # info # io # ipcache # mem # menu # netdb # non_peers # objects # offline_toggle * # pconn # peer_select # reconfigure * # redirector # refresh # server_list # shutdown * # store_digest # storedir # utilization # via_headers # vm_objects # # * Indicates actions which will not be performed without a # valid password, others can be performed if not listed here. # # To disable an action, set the password to "disable". # To allow performing an action without a password, set the # password to "none". # # Use the keyword "all" to set the same password for all actions. # #Example: # cachemgr_passwd secret shutdown # cachemgr_passwd lesssssssecret info stats/objects # cachemgr_passwd disable all #Default: # No password. Actions which require password are denied. # TAG: client_db on|off # If you want to disable collecting per-client statistics, # turn off client_db here. #Default: # client_db on client_db off # TAG: refresh_all_ims on|off # When you enable this option, squid will always check # the origin server for an update when a client sends an # If-Modified-Since request. Many browsers use IMS # requests when the user requests a reload, and this # ensures those clients receive the latest version. # # By default (off), squid may return a Not Modified response # based on the age of the cached version. #Default: # refresh_all_ims off # TAG: reload_into_ims on|off # When you enable this option, client no-cache or ``reload'' # requests will be changed to If-Modified-Since requests. # Doing this VIOLATES the HTTP standard. Enabling this # feature could make you liable for problems which it # causes. # # see also refresh_pattern for a more selective approach. #Default: # reload_into_ims off # TAG: connect_retries # Limits the number of reopening attempts when establishing a single # TCP connection. All these attempts must still complete before the # applicable connection opening timeout expires. # # By default and when connect_retries is set to zero, Squid does not # retry failed connection opening attempts. # # The (not recommended) maximum is 10 tries. An attempt to configure a # higher value results in the value of 10 being used (with a warning). # # Squid may open connections to retry various high-level forwarding # failures. For an outside observer, that activity may look like a # low-level connection reopening attempt, but those high-level retries # are governed by forward_max_tries instead. # # See also: connect_timeout, forward_timeout, icap_connect_timeout, # ident_timeout, and forward_max_tries. #Default: # Do not retry failed connections. # TAG: retry_on_error # If set to ON Squid will automatically retry requests when # receiving an error response with status 403 (Forbidden), # 500 (Internal Error), 501 or 503 (Service not available). # Status 502 and 504 (Gateway errors) are always retried. # # This is mainly useful if you are in a complex cache hierarchy to # work around access control errors. # # NOTE: This retry will attempt to find another working destination. # Which is different from the server which just failed. #Default: # retry_on_error off # TAG: as_whois_server # WHOIS server to query for AS numbers. NOTE: AS numbers are # queried only when Squid starts up, not for every request. #Default: # as_whois_server whois.ra.net # TAG: offline_mode # Enable this option and Squid will never try to validate cached # objects. #Default: # offline_mode off # TAG: uri_whitespace # What to do with requests that have whitespace characters in the # URI. Options: # # strip: The whitespace characters are stripped out of the URL. # This is the behavior recommended by RFC2396 and RFC3986 # for tolerant handling of generic URI. # NOTE: This is one difference between generic URI and HTTP URLs. # # deny: The request is denied. The user receives an "Invalid # Request" message. # This is the behaviour recommended by RFC2616 for safe # handling of HTTP request URL. # # allow: The request is allowed and the URI is not changed. The # whitespace characters remain in the URI. Note the # whitespace is passed to redirector processes if they # are in use. # Note this may be considered a violation of RFC2616 # request parsing where whitespace is prohibited in the # URL field. # # encode: The request is allowed and the whitespace characters are # encoded according to RFC1738. # # chop: The request is allowed and the URI is chopped at the # first whitespace. # # # NOTE the current Squid implementation of encode and chop violates # RFC2616 by not using a 301 redirect after altering the URL. #Default: # uri_whitespace strip # TAG: chroot # Specifies a directory where Squid should do a chroot() while # initializing. This also causes Squid to fully drop root # privileges after initializing. This means, for example, if you # use a HTTP port less than 1024 and try to reconfigure, you may # get an error saying that Squid can not open the port. #Default: # none # TAG: pipeline_prefetch # HTTP clients may send a pipeline of 1+N requests to Squid using a # single connection, without waiting for Squid to respond to the first # of those requests. This option limits the number of concurrent # requests Squid will try to handle in parallel. If set to N, Squid # will try to receive and process up to 1+N requests on the same # connection concurrently. # # Defaults to 0 (off) for bandwidth management and access logging # reasons. # # NOTE: pipelining requires persistent connections to clients. # # WARNING: pipelining breaks NTLM and Negotiate/Kerberos authentication. #Default: # Do not pre-parse pipelined requests. pipeline_prefetch 3 # TAG: high_response_time_warning (msec) # If the one-minute median response time exceeds this value, # Squid prints a WARNING with debug level 0 to get the # administrators attention. The value is in milliseconds. #Default: # disabled. # TAG: high_page_fault_warning # If the one-minute average page fault rate exceeds this # value, Squid prints a WARNING with debug level 0 to get # the administrators attention. The value is in page faults # per second. #Default: # disabled. # TAG: high_memory_warning # Note: This option is only available if Squid is rebuilt with the # GNU Malloc with mstats() # # If the memory usage (as determined by gnumalloc, if available and used) # exceeds this amount, Squid prints a WARNING with debug level 0 to get # the administrators attention. #Default: # disabled. # TAG: sleep_after_fork (microseconds) # When this is set to a non-zero value, the main Squid process # sleeps the specified number of microseconds after a fork() # system call. This sleep may help the situation where your # system reports fork() failures due to lack of (virtual) # memory. Note, however, if you have a lot of child # processes, these sleep delays will add up and your # Squid will not service requests for some amount of time # until all the child processes have been started. # On Windows value less then 1000 (1 milliseconds) are # rounded to 1000. #Default: # sleep_after_fork 0 # TAG: windows_ipaddrchangemonitor on|off # Note: This option is only available if Squid is rebuilt with the # MS Windows # # On Windows Squid by default will monitor IP address changes and will # reconfigure itself after any detected event. This is very useful for # proxies connected to internet with dial-up interfaces. # In some cases (a Proxy server acting as VPN gateway is one) it could be # desiderable to disable this behaviour setting this to 'off'. # Note: after changing this, Squid service must be restarted. #Default: # windows_ipaddrchangemonitor on # TAG: eui_lookup # Whether to lookup the EUI or MAC address of a connected client. #Default: # eui_lookup on eui_lookup off # TAG: max_filedescriptors # Reduce the maximum number of filedescriptors supported below # the usual operating system defaults. # # Remove from squid.conf to inherit the current ulimit setting. # # Note: Changing this requires a restart of Squid. Also # not all I/O types supports large values (eg on Windows). #Default: # Use operating system limits set by ulimit. # TAG: force_request_body_continuation # This option controls how Squid handles data upload requests from HTTP # and FTP agents that require a "Please Continue" control message response # to actually send the request body to Squid. It is mostly useful in # adaptation environments. # # When Squid receives an HTTP request with an "Expect: 100-continue" # header or an FTP upload command (e.g., STOR), Squid normally sends the # request headers or FTP command information to an adaptation service (or # peer) and waits for a response. Most adaptation services (and some # broken peers) may not respond to Squid at that stage because they may # decide to wait for the HTTP request body or FTP data transfer. However, # that request body or data transfer may never come because Squid has not # responded with the HTTP 100 or FTP 150 (Please Continue) control message # to the request sender yet! # # An allow match tells Squid to respond with the HTTP 100 or FTP 150 # (Please Continue) control message on its own, before forwarding the # request to an adaptation service or peer. Such a response usually forces # the request sender to proceed with sending the body. A deny match tells # Squid to delay that control response until the origin server confirms # that the request body is needed. Delaying is the default behavior. #Default: # Deny, unless rules exist in squid.conf. # TAG: server_pconn_for_nonretriable # This option provides fine-grained control over persistent connection # reuse when forwarding HTTP requests that Squid cannot retry. It is useful # in environments where opening new connections is very expensive # (e.g., all connections are secured with TLS with complex client and server # certificate validation) and race conditions associated with persistent # connections are very rare and/or only cause minor problems. # # HTTP prohibits retrying unsafe and non-idempotent requests (e.g., POST). # Squid limitations also prohibit retrying all requests with bodies (e.g., PUT). # By default, when forwarding such "risky" requests, Squid opens a new # connection to the server or cache_peer, even if there is an idle persistent # connection available. When Squid is configured to risk sending a non-retriable # request on a previously used persistent connection, and the server closes # the connection before seeing that risky request, the user gets an error response # from Squid. In most cases, that error response will be HTTP 502 (Bad Gateway) # with ERR_ZERO_SIZE_OBJECT or ERR_WRITE_ERROR (peer connection reset) error detail. # # If an allow rule matches, Squid reuses an available idle persistent connection # (if any) for the request that Squid cannot retry. If a deny rule matches, then # Squid opens a new connection for the request that Squid cannot retry. # # This option does not affect requests that Squid can retry. They will reuse idle # persistent connections (if any). # # This clause only supports fast acl types. # See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. # # Example: # acl SpeedIsWorthTheRisk method POST # server_pconn_for_nonretriable allow SpeedIsWorthTheRisk #Default: # Open new connections for forwarding requests Squid cannot retry safely. ================================================ FILE: squid_restart ================================================ #!/bin/bash -x # restart Squid sudo launchctl unload -w /Library/LaunchDaemons/org.macports.Squid.plist sudo killall '(squid-1)' sudo killall squid sleep 5 sudo launchctl load -w /Library/LaunchDaemons/org.macports.Squid.plist ================================================ FILE: user.action ================================================ ###################################################################### # # File : $Source: /cvsroot/ijbswa/current/user.action,v $ # # $Id: user.action,v 1.13 2011/11/06 11:36:01 fabiankeil Exp $ # # Purpose : User-maintained actions file, see # http://www.privoxy.org/user-manual/actions-file.html # ###################################################################### # This is the place to add your personal exceptions and additions to # the general policies as defined in default.action. (Here they will be # safe from updates to default.action.) Later defined actions always # take precedence, so anything defined here should have the last word. # See http://www.privoxy.org/user-manual/actions-file.html, or the # comments in default.action, for an explanation of what an "action" is # and what each action does. # The examples included here either use bogus sites, or have the actual # rules commented out (with the '#' character). Useful aliases are # included in the top section as a convenience. ############################################################################# # Aliases ############################################################################# {{alias}} ############################################################################# # # You can define a short form for a list of permissions - e.g., instead # of "-crunch-incoming-cookies -crunch-outgoing-cookies -filter -fast-redirects", # you can just write "shop". This is called an alias. # # Currently, an alias can contain any character except space, tab, '=', '{' # or '}'. # But please use only 'a'-'z', '0'-'9', '+', and '-'. # # Alias names are not case sensitive. # # Aliases beginning with '+' or '-' may be used for system action names # in future releases - so try to avoid alias names like this. (e.g. # "+crunch-all-cookies" below is not a good name) # # Aliases must be defined before they are used. # # These aliases just save typing later: # +crunch-all-cookies = +crunch-incoming-cookies +crunch-outgoing-cookies -crunch-all-cookies = -crunch-incoming-cookies -crunch-outgoing-cookies allow-all-cookies = -crunch-all-cookies -session-cookies-only -filter{content-cookies} allow-popups = -filter{all-popups} -filter{unsolicited-popups} +block-as-image = +block{Blocked image request.} +handle-as-image -block-as-image = -block # These aliases define combinations of actions # that are useful for certain types of sites: # fragile = -block -crunch-all-cookies -filter -fast-redirects -hide-referer -prevent-compression shop = -crunch-all-cookies allow-popups # Your favourite blend of filters: # myfilters = +filter{html-annoyances} +filter{js-annoyances} +filter{all-popups}\ +filter{webbugs} +filter{banners-by-size} # Allow ads for selected useful free sites: # allow-ads = -block -filter{banners-by-size} -filter{banners-by-link} #... etc. Customize to your heart's content. ## end aliases ######################################################## ####################################################################### # Begin examples: ##################################################### # Say you have accounts on some sites that you visit regularly, and you # don't want to have to log in manually each time. So you'd like to allow # persistent cookies for these sites. The allow-all-cookies alias defined # above does exactly that, i.e. it disables crunching of cookies in any # direction, and the processing of cookies to make them only temporary. # { allow-all-cookies } #.sourceforge.net #sunsolve.sun.com #slashdot.org #.yahoo.com #.msdn.microsoft.com #.redhat.com # Say the site where you do your homebanking needs to open popup # windows, but you have chosen to kill popups uncoditionally by default. # This will allow it for your-example-bank.com: # { -filter{all-popups} } .banking.example.com # Some hosts and some file types you may not want to filter for # various reasons: # { -filter } # Technical documentation is likely to contain strings that might # erroneously get altered by the JavaScript-oriented filters: # #.tldp.org #/(.*/)?selfhtml/ # And this stupid host sends streaming video with a wrong MIME type, # so that Privoxy thinks it is getting HTML and starts filtering: # stupid-server.example.com/ # Example of a simple "block" action. Say you've seen an ad on your # favourite page on example.com that you want to get rid of. You have # right-clicked the image, selected "copy image location" and pasted # the URL below while removing the leading http://, into a { +block{reason} } # section. Note that { +handle-as-image } need not be specified, since # all URLs ending in .gif will be tagged as images by the general rules # as set in default.action anyway: # { +block{Nasty ads.} } www.example.com/nasty-ads/sponsor.gif # The URLs of dynamically generated banners, especially from large banner # farms, often don't use the well-known image file name extensions, which # makes it impossible for Privoxy to guess the file type just by looking # at the URL. # You can use the +block-as-image alias defined above for these cases. # Note that objects which match this rule but then turn out NOT to be an # image are typically rendered as a "broken image" icon by the browser. # Use cautiously. # { +block-as-image } #.doubleclick.net #/Realmedia/ads/ #ar.atwola.com/ # Now you noticed that the default configuration breaks Forbes # Magazine, but you were too lazy to find out which action is the # culprit, and you were again too lazy to give feedback, so you just # used the fragile alias on the site, and -- whoa! -- it worked. The # 'fragile' aliases disables those actions that are most likely to break # a site. Also, good for testing purposes to see if it is Privoxy that # is causing the problem or not. # { fragile } .forbes.com .abcya.com .att.com .forbes.com .neimanmarcus.com .tiffany.com # Here are some sites we wish to support, and we will allow their ads # through. # { allow-ads } www.thegreatcourses.com .kayak.com ads1.msn.com/ .bing.com/travel/jsxc\.vjs\? .onecause.com #.sourceforge.net #.slashdot.org #.osdn.net # user.action is generally the best place to define exceptions and # additions to the default policies of default.action. Some actions are # safe to have their default policies set here though. So let's set a # default policy to have a 'blank' image as opposed to the checkerboard # pattern for ALL sites. '/' of course matches all URLs. # patterns: # { +set-image-blocker{blank} } #/ # Enable the following section (not the regression-test directives) # to rewrite and redirect click-tracking URLs on news.google.com. # Disabling JavaScript should work as well and probably works more reliably. # # Redirected URL = http://news.google.com/news/url?ct2=us%2F0_0_s_1_1_a&sa=t&usg=AFQjCNHJWPc7ffoSXPSqBRz55jDA0KgxOQ&cid=8797762374160&url=http%3A%2F%2Fonline.wsj.com%2Farticle%2FSB10001424052970204485304576640791304008536.html&ei=YcqeTsymCIjxggf8uQE&rt=HOMEPAGE&vm=STANDARD&bvm=section&did=-6537064229385238098 # Redirect Destination = http://online.wsj.com/article/SB10001424052970204485304576640791304008536.html # Ignore = Yes # {+fast-redirects{check-decoded-url}} news.google.com/news/url.*&url=http.*& # Enable the following section (not the regression-test directives) # to block various Facebook "like" and similar tracking URLs. At the # time this section was added it was reported to not break Facebook # itself but this may have changed by the time you read this. This URL # list is probably incomplete and if you don't have an account anyway, # you may prefer to block the whole domain. # # Blocked URL = http://www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Ffacebook.com%2Farstechnica&width=300&colorscheme=light&show_faces=false&stream=false&header=false&height=62&border_color=%23FFFFFF # Ignore = Yes # Blocked URL = http://www.facebook.com/plugins/activity.php?site=arstechnica.com&width=300&height=370&header=false&colorscheme=light&recommendations=false&border_color=%23FFFFFF # Ignore = Yes # Blocked URL = http://www.facebook.com/plugins/fan.php?api_key=368513495882&connections=10&height=250&id=8304333127&locale=en_US&sdk=joey&stream=false&width=377 # Ignore = Yes # Blocked URL = http://www.facebook.com/plugins/like.php?api_key=368513495882&channel_url=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%3Fversion%3D3%23cb%3Df13997452c%26origin%3Dhttp%253A%252F%252Fonline.wsj.com%252Ff1b037e354%26relation%3Dparent.parent%26transport%3Dpostmessage&extended_social_context=false&href=http%3A%2F%2Fonline.wsj.com%2Farticle%2FSB10001424052970204485304576640791304008536.html&layout=button_count&locale=en_US&node_type=link&ref=wsj_share_FB&sdk=joey&send=false&show_faces=false&width=90 # Ignore = Yes # {+block{Facebook "like" and similar tracking URLs.}} www.facebook.com/(extern|plugins)/(login_status|like(box)?|activity|fan)\.php # http://serverfault.com/questions/182293/privoxy-rule-to-block-facebook-spying { +block-as-image{People-tracking button.} } .facebook.com/(plugins|widgets)/(like|fan|activity).* # fix sites that privoxy breaks { fragile } ads1.msn.com/ .bing.com/travel/jsxc\.vjs\? .onecause.com .go.com .drugstore.com .neimanmarcus.com .evite.com # fix icloud, photostream { -block -filter -hide-user-agent -deanimate-gifs -hide-from-header -set-image-blocker } TAG:^User-Agent: PhotoStreamAgent/ .apple.com .icloud.com .amazonaws.com # sourceforge { -block -filter -deanimate-gifs} .sourceforge.net .dell.com # expedia { -hide-user-agent } .expedia.com # youtube # See: http://superuser.com/questions/199230/privoxy-causes-problem-for-ipod-touch-youtube-app { fragile -deanimate-gifs} .googlevideo.com { -filter -deanimate-gifs} .youtube.com .vimeo.com # TV Guide listings on EyeTV; TitanTV Remote Scheduling { -block -hide-user-agent } epg.eyetv.com partners.titantv.com .macrovision.com # don't filter downloads {-filter -deanimate-gifs} /.*\.iso(\?|$) /.*\.mp3(\?|$) /.*\.mp4(\?|$) /.*\.mov(\?|$) /.*\.mpg(\?|$) /.*\.ogg(\?|$) /.*\.aac(\?|$) /.*\.zip(\?|$) /.*\.pdf(\?|$) /.*\.dmg(\?|$) /.*\.tar(\?|$) /.*\.gz(\?|$) /.*\.dat(\?|$) ================================================ FILE: whitelist.txt ================================================ # whitelisted hosts (FQDN and DN) will be deleted frpm hphost's host.zip s3.amazonaws.com www.s3.amazonaws.com broker.adobe.com sstats.adobe.com stats.adobe.com j.mp securemetrics.apple.com autolinkmaker.itunes.apple.com rover.ebay.com yelp.com www.yelp.com inc.com www.inc.com gdlp01.c-wss.com h.online-metrix.net drugstore.com www.drugstore.com evite.com www.evite.com thedailybeast.com www.thedailybeast.com alibaba.com www.alibaba.com # iphonehacks.com # www.iphonehacks.com # www.kqzyfj.com funnyordie.com www.funnyordie.com intensedebate.com www.intensedebate.com # Blocking this domain breaks CNN app live streaming # To diagnose: # tcpdump -e -ttt -i en0 -w my-iPad-cnn-3128.pcap src my-iPad or dst my-iPad # grep -a 'URL: .*$/\1/; print;' | uniq bea4.v.fwmrm.net