filter and redirector plugin for Squid

 squidGuard is a free, flexible and ultra fast filter, redirector
 and access controller plugin for squid. It lets you define multiple
 access rules with different restrictions for different user groups on
 a squid cache. squidGuard uses squid's standard redirector interface.
 .
 Three seldom used contrib scripts need perl support:
 squidGuardRobot, sgclean, hostbyname