Squid
Squid Proxy Server Settings
SARG: Squid Analysis Report Generator
"Squid Analysis Report Generator is a tool that allow you to view "where" your users are going to on the Internet."
SARG Homepage: http://sarg.sourceforge.net/
SME SARG HowTo: Sarg This section should contain links to the various Squid modifiers - Squidguard, Dansguardian, Sarg, etc.
DansGuardian: true web content filtering for all
"DansGuardian is an award winning web content filtering proxy(1) for Linux, FreeBSD, OpenBSD, NetBSD, Mac OS X, HP-UX, and Solaris that uses Squid(2) to do all the fetching. It filters using multiple methods. These methods include URL and domain filtering, content phrase filtering, PICS filtering, MIME filtering, file extension filtering, POST limiting."
DansGuardian Homepage: http://dansguardian.org/
SME DansGuardian HowTo: Dansguardian
SuidGuard
"SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid."
Squidguard Homepage: http://www.squidguard.org/
SME SquidGuard Howto: SquidGuard
ProxyPass
Despite the name, ProxyPass has nothing to do with the Squid proxy and is actually an Apache directive designed to allow a given URL on your server to return the content of some other webserver - either internal (behind your SME) or external.
Apache proxypass Documentation: http://httpd.apache.org/docs/2.2/mod/mod_proxy.html#proxypass
SME proxypass Howto: SME_Server:Documentation:FAQ#Proxy_Pass