squidGuard is a combined filter, redirector and access controller plugin for Squid. It can be used to: * limit the web access for some users to a list of accepted/well known web servers and/or URLs only. * block access to some listed or blacklisted web servers and/or URLs for some users. * block access to URLs matching a list of regular expressions or words for some users. * enforce the use of domainnames/prohibit the use of IP address in URLs. * redirect blocked URLs to an "intelligent" CGI based info page. * redirect unregistered user to a registration form. * redirect popular downloads like Netscape, MSIE etc. to local copies. * redirect banners to an empty GIF. * have different access rules based on time of day, day of the week, date etc. * have different rules for different user groups. * and much more..