I am using squid server in my Debian server, I want to block some websites in my system and I followed all the procedures for this but there is no result.
You have to do some changes in squid.conf and here are the steps:
open this file /etc/squid3/squid.conf
add these lines:
acl bad_url dstdomain "/etc/squid3/bad-sites.acl"
http_access deny bad_url
then go to /etc/squid3/bad-sites.acl and add domains with this format
.google.com
.msn.com
.app.facebook.com