gedit /etc/squid3/squid.conf

http_port 3128 transparent
cache_mgr nama siswa@nama domain
acl local src net id/netmask
dns_name server IP DNS server
acl blok dstdomain .nama situs ygakan di blokir
http_access deny blok
http_access allow local
http_access allow all

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
service