From: Alberto Cappadonia <alberto.cappadonia@xxxxxxxxx> > There exist documentation about the formal model used to > evalute acl and http_access? Yes, squid has a documentation section on its website: By example: http://wiki.squid-cache.org/SquidFaq/SquidAcl#Access_Lists "Access list rules are checked in the order they are written. List searching terminates as soon as one of the rules is a match." JD