How to disable proxyfire and ananimizers?

Question

Squid

Good afternoon!
The situation is this... there is a server on debian 7, squid 2.9, sams. All that is necessary is prohibited. But there are "smart" users who use animizers and proxifiers.
Is there a way to disable all of this?

Answer 1

use whitelist instead of blacklist.

Answer 2

You can, of course, but the list is too long ....

Answer 3

you can use such a list
www.shallalist.de
but of course a white list or administrative measures are more effective, there is an internal routine, users must be familiar with it and adhere to it, if they do not adhere to it, then this should not be an administrator's problem, this is a matter for the administration, what tools to use, reprimands, fines, dismissals, public executions.