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Re: Tool to find hidden web proxy server
From: Christine Kronberg <Christine_Kronberg () genua de>
Date: Thu, 2 Sep 2004 10:34:55 +0200 (CEST)


This problem is strictly with in company internet access firewall and in the
LAN only. In a company, policy for Internet access says it is through IP
only. The others can not browse the internet. This policy is implemented on
firewall. Few smart guys have installed free proxy server running on non
default ports and distributed the internet access to their friends. The
firewall sees the traffic coming from the authorized IP and does not stop
them. We want to know who has installed proxy on there machine.

  What about setting up snort sensors to sniff the LAN for HTTP proxy
  traffic by excluding the "good" IPs as sources? Or the other way round:
  Configuring the IDS to sniff HTTP Proxy connections to the "good" IPs?
  This should bring up those who connect to those proxies as well as the
  proxies themselves.


                                                         Chris Kronberg.


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