[K12OSN] OT? Fixing an Open Proxy

Tim Litwiller tim at litwiller.net
Sun Jun 5 21:00:06 UTC 2005

opm.blitzed.org doens't list "open relays" it lists "open proxies"
So tho it is good to make sure your server isn't an open relay - that 
won't fix your problem now.

You have to make sure that your proxy server will not allow outside 
users access - or at leas not without a username password combo.

Check your squid configuration and then squidguard and or dansguardian.
If any of those are proxying from the external port you will get listed.

you will want to make sure they they are only bound to the internal ip 
address of your server.

Debbie Schiel 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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