A popular request is to block certain content types from being served to clients. Squid currently can not do “content inspection” to decide on the file type based on the contents, but it is able to block HTTP replies based on the servers’ content MIME Type reply.
via How to block flash videos using Squid proxy Server | Linux Blog.
R66T, pronounced “Root 66” and intended as a play on the famous American highway Route 66, describes itself as “one of the nation’s leading publisher of targeted content, information and advertising to private Wi-Fi and High-Speed Internet Access (HSIA) networks, conducting tens of millions of individual user sessions—approaching one-billion user-minutes per month.” The company says that it supports Wi-Fi networks at places like airports, hotels, coffee shops, and malls, often providing free access in exchange for showing “hyperlocal” advertisements.
via How a banner ad for H&R Block appeared on apple.com—without Apple’s OK | Ars Technica.
This might be a good opportunity to mention that everyone should use AdBlock Plus, a plugin available for many web browsers, which will block these kind of advertisements. Blocking ads is also a good PC security measure since ads provide a vector for a lot of malware to inject themselves.
Squid Analyzer parses the native access log format of the Squid proxy and reports general statistics about hits, bytes, users, networks, top URLs, and top second level domains. Statistic reports are oriented toward user and bandwidth control; this is not a pure cache statistics generator.
Squid’s access control scheme is relatively comprehensive and difficult for some people to understand. There are two different components: ACL elements, and access lists. An access list consists of an allow or deny action followed by a number of ACL elements.
SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidguard: it is fast and it is free. SquidGuard is published under GNU Public License.
via SquidGuard.
http://www.adzapper.sourceforge.net also seems good.
Running a transparent proxy server on your network can be used for more advanced content filtering of web pages for environments such as a school or library (where in some locales, filtering is required by law) or as a way to protect children in the household.
This guide will help you enable a transparent proxy server on your network by having your WRT54G router forward all traffic to the proxy server automatically.
Setting Up Squid In Gateway As A Transparent Proxy – Welcome to SourceLINUX Wiki...
Good howto for setting up squid. This link was also posted last May.
SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidguard: it is fast and it is free. SquidGuard is published under GNU Public License.
via SquidGuard.