Web filter recommendations request: moderate price with good CGI/PHP proxy filtering

[Andrew Stewart <astewart () notre1 com>]

Currently the company I work for currently uses DansGuardian 
<http://dansguardian.org/> for our web content filtering, but we are 
having a problem with people using CGI/PHP proxies (such as the ones 
below) to bypass it.  Websense <http://www.websense.com> seems to be the 
gold standard in content filtering, but the price on it would really hit 
our budget hard.  Does anyone here have something cheaper that I should 
take a look at?


Here are some of the CGI/PHP proxies we have discovered users utilizing 
to bypass our content filtering:
<http://56st.com>
<http://www.proxysf.com>
<http://blackip.info>

-aws