[K12OSN] OT? Fixing an Open Proxy

Ron Freidel rfreidel at computergeex.com
Tue Jun 7 16:10:01 UTC 2005

The best way would be to run a firewall on the public ip and forward 80 and
whatever to your server.

If you are running something like squid/dansguardian on a firewall then run
them only on the lan interface.

Debbie Schiel (debbie at redeemer.qld.edu.au) wrote:
> Hi all,
> Now that we have our webserver with static IP available for teachers and the
> rest of the world to see, I've found that 1. Our broadband internet access from
> school has slowed down to dial-up speeds, and 2. Staff are complaining that
> collegues aren't receiving email.
> Upon investigation I've found that our IP address is listed on opm.blitzed.org
> and many others which apparently means that some charming people out there are
> using our naive school server as a spam machine!
> They say I have to fix my open proxy, and provide information that goes way over
> my head. Can anyone provide a simple HOWTO for fixing an open proxy?
> Thank you.
> Best regards,
> Debbie
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Ron Freidel
Sys Admin
Computer Geex, Inc.
(406) 491-3378

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