Editing Squid (software) (section)

{{Short description|Caching and forwarding HTTP web proxy}}
{{Use dmy dates|date=January 2020}}
{{Infobox software
| name = Squid
| logo = Squid Now.png
| logo caption = Squid project logo<ref>{{cite web |url=https://www.squid-cache.org/Artwork/ |title=Squid Project Logo |access-date=6 July 2014}}</ref>
| logo alt =
| logo size = 200px
| developer = Duane Wessels, Henrik Nordström, Amos Jeffries, Alex Rousskov, Francesco Chemolli, Robert Collins, Guido Serassio and volunteers<ref name="Who looks after the Squid project?">{{cite web |url=https://www.squid-cache.org/Intro/who.html |title=Who looks after the Squid project?}}</ref>
| released = {{Start date and age|1996|07}}
| latest release version = {{wikidata|property|preferred|references|edit|Q841783|P348|P548=Q2804309}}
| latest release date = {{wikidata|qualifier|preferred|single|Q841783|P348|P548=Q2804309|P577}}
| latest preview version = {{wikidata|property|preferred|references|edit|Q841783|P348|P548=Q51930650}}
| latest preview date = {{wikidata|qualifier|preferred|single|Q841783|P348|P548=Q51930650|P577}}
| repo = {{URL|github.com/squid-cache/squid}}
| programming language = [[C++]]<ref>{{Citation |title=squid-cache/squid |date=2022-07-27 |url=https://github.com/squid-cache/squid |publisher=Squid |access-date=2022-07-27}}</ref>
| operating system = [[Berkeley Software Distribution|BSD]], [[Linux]], [[Unix]], [[Microsoft Windows|Windows]]<ref>{{cite web |url=https://wiki.squid-cache.org/BestOsForSquid |title=What is the Best OS for Squid?}}</ref>
| genre = [[Proxy server]]
| license = [[GNU General Public License|GPL]] 2.0 or later<ref name="Squid License">{{cite web |url=https://bazaar.launchpad.net/~squid/squid/trunk/view/head:/README |title=Squid License}}</ref>
| website = {{URL|https://www.squid-cache.org}}
}}

[[File:LAMP software bundle.svg|thumb|300px|The [[LAMP (software bundle)|LAMP stack]] with Squid as web cache.]]

'''Squid''' is a [[web cache|caching]] and forwarding HTTP [[web proxy]]. It has a wide variety of uses, including speeding up a [[web server]] by caching repeated requests, caching [[World Wide Web]] (WWW), [[Domain Name System]] (DNS), and other [[Computer network|network]] lookups for a group of people sharing network resources, and aiding security by filtering traffic. Although used for mainly [[HTTP]] and [[File Transfer Protocol]] (FTP), Squid includes limited support for several other [[protocol (computing)|protocols]] including [[Internet Gopher]], Secure Sockets Layer (SSL),<ref name=":0" /> [[Transport Layer Security]] (TLS), and Hypertext Transfer Protocol Secure ([[HTTPS]]). Squid does not support the [[SOCKS]] protocol, unlike [[Privoxy]], with which Squid can be used in order to provide SOCKS support.

Squid was originally designed to run as a [[daemon (computer software)|daemon]] on [[Unix-like]] systems. A Windows port was maintained up to version 2.7. New versions available on Windows use the [[Cygwin]] environment.<ref>{{cite web|title=Squid for Windows |website=[[GitHub]] |url=https://github.com/diladele/squid-windows |quote=Current build is based on the latest Squid 4 build for Cygwin Windows 64 bit |date=February 2024}}</ref><ref>{{cite web|title=Squid-cache.org Knowledge Base |url=https://wiki.squid-cache.org/KnowledgeBase/Windows |quote=Squid on Windows }}</ref> Squid is [[free software]] released under the [[GNU General Public License]].