Blocking Proxy Websites/server

[ossian]

Hi

Any ideas how to block pupils at school accessing proxy server website, we have blocked Facebook, Myspace, Bebo etc at the router, but they just go to one of many proxy sites and login that way.

Cheers

 

[ossian]

Thanks for all the replies, good advice, looks like a real battle to contain, what we're going to do is give each student a log in and make them responsible for what they look at etc, about 30 users in total, explain that websites they visit may be monitored, this I hope should work in practice.