BLOCKING THE WAY THROUGH THE WEB SITE RB 450

how blocking proxy sites very easy, incidentally dikantorpake RB 450 has been upgraded.
The way into the IP-> FIREWALL
In the filter rules click the + sign, chain (forward), protocol (tcp),
destination port (80)
on the advanced tab, on content type aja facebook, then apply and ok

like the picture was taken of this:
There are also other ways to block some websites with 1 rule,
still the same entrance to IP-FIREWALL, select the Layer 7 protocol, optional
name, then type the website that would be blocked.
after that create a filter rule, do the same with the first way, the advanced menu, Layer 7 protocol, enter the name that we created earlier.