Re: Fingerprinting Firewall
From: Demetrio Carrión (demetrio.carrion_at_gmail.com)
Date: Fri, 6 May 2005 16:19:38 -0300 To: firstname.lastname@example.org
I think of a particular case where you are able to sniff layer two
traffic in the firewall segment and this firewall is an
Would it possible to discover the firewall vendor by correlating the
firewall MAC layer address and the OUI, then someone could narrow the
firewall to a specific vendor and possible versions?
IT Security Consultant
On 4/8/05, Byron L. Sonne <email@example.com> 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.