acl sites_bloqueados url_regex -i /etc/squid/acls/sites_bloqueados.txt acl sites_bloqueados dstdomain -i "/etc/squid/acls/sites_bloqueados.txt" http_access deny sites_bloqueados http_access allow lan in the sites sites_bloqueados.txt there is the url facebook.com but the proxy doesn't DENY it. Make sure site_bloqueados.txt has the following .fbcdn.net .facebook.com Put the "http_access deny" on top of any "http_access allow" # Edmonds