Kids bypassing firewall with proxy sites

I posted this in the comp.security.firewalls group, but got smart @$$
answers from people too proud to say "I dont know"... so I will post
here...


I work for a K - 12 school.

In my opinion, we have some very fair rules and regulations regaurding
internet and computer use.


We use a Sonicwall firewall, 3060, I subscribe to content fltering,
which I love. It keeps out all the horrible junk that kids may
accidently come across (Or purposely) and it covers our rear.


Due to recent events, and some within the school, I have been ordered
to block myspace.com.


I have several other sites faculty and staff have asked me to block
within the content filtering section of my sonicwall admin page.


However, some students got smart, and searched google for proxy and
anonymous. Thousands of results come up, allowing them to type in any
website they like (including myspace) and surf around on it, bypassing
my firewall.


There is an option in sonicwall that says "Restrict Web Features::" and

I checked "Access to HTTP Proxy Servers" But I am still able to get to
sites via these proxy sites that shoulf be blocked...


Any advice?


Thanks in advance!

.

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