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Re: [K12OSN] website blocking

I built a Squid / Dansguardian content filter in about 10 minutes using Ubuntu 5.10. Apt-get is a wonderful thing.

Config files were very straightforward and the documentation is pretty good.

I'm running it on any ancient P2 with 128 MB of ram and it runs fine.

I just created a rule on the firewall which prohibits outbound traffic on port 80 and 443 from the terminal server to the internet. But, there is also a rule which allows those ports from the squid/dansguardian box.

That way, students HAVE to use the proxy. They can't mess around or else they can't access the internet at all.

Petre Scheie wrote:

Joseph Bishay wrote:


On 11/9/05, Petre Scheie <petre maltzen net> wrote:

That's come up before: For DansGuardian or SquidGuard to work, they must be installed on a machine separate from the terminal server; it won't work if you install it on the
terminal server.

Is that for sure? On the previous version of ltsp (the one released
last year) I had it running on the terminal server no problem. You
just have to make sure that each account's proxy is set to the correct


I think that was the issue: people wanted to be able to prevent students from bypassing the filtered proxy. If it's set in each user's account, the user could just go in and turn off the proxy setting and hit any site. Using a separate box as the gateway & proxy made it impossible to sneak around the filter (and eliminated the need to configure every user's setup).

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