From: Paul Melson (pmelson@gmail.com)
Date: Mon Jan 15 2007 - 11:55:54 EST
-----Original Message-----
Subject: reverse proxy identification
> When I browse to the IPs with firefox, I recieve several messages "No web
site is configured at this
> address." for some IP.
> Does anybody here know if this message is specific to a given reverse
proxy/web server product ?
That's an IIS message.
For evidence of a reverse proxy - particularly one that's doing app
firewalling - look for it to block stuff that's attack-like. For instance:
Request: /sexpistols.asp?track=god%20save%20the%20queen
Response: 200
Request: /sexpostols.asp?track=anarchy/../in/../the/../uk
Response: 302, 404, or some other response that suggests the app never saw
your request
If you're using Nessus, recent versions will often report the presence of
urlscan when a web app 'firewall' is in front of the actual web server.
PaulM
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