[K12OSN] web filtering with SquidGuard

Trond Mæhlum trond at maehlum.net
Mon Feb 6 20:05:53 UTC 2006

We are filtering unwanted webpages with SquidGuard. We set the 
transparent proxy script, using iptables, to redirect all port 80 
surfing to squid. We have been very happy with our solution. But now it 
has come to our attention that our efforts to block unwanted webpages 
are easily bypassed. The students use web-proxies instead. They use 
pages like proxypop.com to jump directly to the banned pages.

We are blocking these sites as we discover them, but there's just too 
many of them... Our installation of SquidGuard is installed on a Debian 
Sarge machine. It doesn't auto-update it's databases in any way as far 
as I know. Is there some way of updating SquidGuards database of blocked 
urls and domains?

Trond Maehlum

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