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RE: Fingerprinting Firewall

Subject: RE: Fingerprinting Firewall
Date: Mon, 11 Apr 2005 17:33:23 -0400
Another good way is to search job listings that deal with the company with
Online Job postings..  You can get a lot of information just from that
including such things as Firewall makes, models as well as their internal
architectures / systems.


Richard Zaluski
CISO, Security and Infrastructure Services 
iVOLUTION  Technologies Incorporated
905.309.1911
866.601.4678
www.ivolution.ca
rzaluski@ivolution.ca
 
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-----Original Message-----
From: intel96 [mailto:intel96@bellsouth.net] 
Sent: Monday, April 11, 2005 2:21 PM
To: pen-test@securityfocus.com
Subject: Re: Fingerprinting Firewall

One of the best way I have found to find out the type of firewall(s) 
used is through the company's HR site, which sometimes has a completing 
listing on firewalls, IDS, protocols, applications, and MUCH more.   
When this does not work I also check firewall mailing list for 
@targetcompany.com to see if anyone has posted.

intel96

Byron L. Sonne wrote:


We all know that, we can identify firewall using various  methods and 
tools like "firewalk".
Is there any method or tool available which will remotely fingerprint 
and enumerate rule

base configured on the firewall?

Well, more accurately put firewalk does not identify firewalls as much 
as it enumerates what kind of traffic will be passed as well as 
allowing you to figure out ACLs in use.

Generally speaking I don't think you'll be able to come up with 
something along the lines of nmap that will allow you to determine 
what kind of firewall is in place. Certainly not reliably for all 
firewalls and in all situations; there's just to much variability in 
how rules can be configured or traffic scrubbed.

What I do think is possible is the creation of a tool that will narrow 
the field down to a group of firewalls.

However, I suppose that for peculiar situations, either from grievous 
design error or peculiar configurations, certain firewalls might stick 
out like a sore thumb. But my suspicions are that would be rare.



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