detect Proxy on the network

Unanswered Question
Jan 31st, 2007

Is there a way for me to detect if a proxy server or computer was install on the network?

I have this problem too.
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johnisccp Fri, 02/02/2007 - 06:14

Michel,

Thanks for your reply but I do not wish to configure or install a proxy server. I want to find if someone who is not authorize to setup a proxy, setup one on the network.

yjdabear Fri, 02/02/2007 - 12:02

Well, if you have some guesses/assumptions to the characteristics or flavor of the unauthorized proxy in *active* use, you can have measures like having a NetFlow reporting tool/RMON II probe alert you on certain traffic pattern (say, assuming all TCP port 3128 traffic are Squid Cache proxy) going over a certain rate or volume. For a proxy that's not talking much, what can you do? Sweeping port-scan your own IP ranges?

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