RE: Nmap and Watchguard firewalls

[Mike Crabtree <mike () imjc com>]

http://www.guardsite.com/IntrusionPrevention.asp

> From that site:

> >

With our Firebox(r) System and Firebox(r) Vclass firewall/VPN appliances,
you get a matured technology that gives you the benefits of true layered
security in one appliance:

Inspects and filters Application layer 7 traffic 

<<

If it does Layer 7 as that says i.e. proxies - then nmap's more than likely
to show everything as a watchguard - because the packets come from the
watchguard and all the sequences numbers etc. that nmap uses are generated
by the watchguard.

At least that's how I'd understand it.

Anyways - they confirm it later on  :-)

> >

In addition, WatchGuard firewalls perform:

Packet Handling - prevents packets from entering the network until they are
reassembled and examined. 

<<

Mike



-----Original Message-----
From: Kern, Tom [mailto:tkern () CHARMER COM] 
Sent: 24 May 2005 19:06
To: Jorge Luis Jimenez; 'Nmap-Dev (E-mail)
Subject: RE: Nmap and Watchguard firewalls


I'm sorry, I don't think I'm being clear here.


I want to know WHY nmap seems to fingerprint the firewall when i'm scanning
any host outside the firewall? I'm not running any kind of proxy.
I'd like to know why this happens.

Besides, turning off the firewall for the duration of a scan seems risky to
me...


Jorge Luis Jimenez wrote:
> Proved with -sS why you can't disable the fw you are the 
> administrator right?
>
> Jorge Luis Jimenez
> Tech and Network Support
> SIASoft
> Santo Domingo, Republica Dominicana
> Ofic.809-530-7638, Cel.809-304-1660 Fax.809-537-6603
> Email   j.jimenez () siasoft net
> Email   jorgel.jimenez () gmail com
>
> -----Original Message-----
> From: Kern, Tom [mailto:tkern () CHARMER COM]
> Sent: Tuesday, May 24, 2005 1:33 PM
> To: Jorge Luis Jimenez
> Subject: RE: Nmap and Watchguard firewalls
>
> I want to know the techincal reason why when i do a scan with nmap
> from behind a Watchguard firewall, I don't get the host i'm scanning
> but the attrubutes of the firewall instead?
> Is this Watchguard or namp?
> Why is it happening?
> Thanks
>
> Jorge Luis Jimenez wrote:
> > What is the really do yo want
> >
> > Jorge Luis Jimenez
> > Tech and Network Support
> > SIASoft
> > Santo Domingo, Republica Dominicana
> > Ofic.809-530-7638, Cel.809-304-1660 Fax.809-537-6603 Email  
> > j.jimenez () siasoft net Email   jorgel.jimenez () gmail com
> >
> > -----Original Message-----
> > From: Kern, Tom [mailto:tkern () CHARMER COM]
> > Sent: Tuesday, May 24, 2005 11:44 AM
> > To: Jorge Luis Jimenez
> > Subject: RE: Nmap and Watchguard firewalls
> >
> > I can't disable my FW just to port scan a host.
> > Do you or anyone knows why this occurs?
> > thanks
> >
> >
> > Jorge Luis Jimenez wrote:
> > > I have more less the same problem but I have isa Server I disable
> > > the isa Server and the nmap working show me my open port
> > >
> > > Jorge Luis Jimenez
> > > Tech and Network Support
> > > SIASoft
> > > Santo Domingo, Republica Dominicana
> > > Ofic.809-530-7638, Cel.809-304-1660 Fax.809-537-6603
> > > Email   j.jimenez () siasoft net
> > > Email   jorgel.jimenez () gmail com
> > >
> > > -----Original Message-----
> > > From: Kern, Tom [mailto:tkern () CHARMER COM]
> > > Sent: Tuesday, May 24, 2005 11:31 AM
> > > To: Jorge Luis Jimenez
> > > Subject: RE: Nmap and Watchguard firewalls
> > >
> > > Sorry, I only speak english.
> > > My apologies
> > >
> > >
> > >
> > > Jorge Luis Jimenez wrote:
> > > > Please contac me by j.jimenez () siasot net not by Hotmail.com if you
> > > > speake spanish better 
> > > >
> > > > Jorge Luis Jimenez
> > > > Tech and Network Support
> > > > SIASoft
> > > > Santo Domingo, Republica Dominicana
> > > > Ofic.809-530-7638, Cel.809-304-1660 Fax.809-537-6603
> > > > Email   j.jimenez () siasoft net
> > > > Email   jorgel.jimenez () gmail com
> > > > -----Original Message-----
> > > > From: nmap-dev-bounces () insecure org
> > > > [mailto:nmap-dev-bounces () insecure org] On Behalf Of Kern, Tom
> > > > Sent: Tuesday, May 24, 2005 9:16 AM
> > > > To: nmap-dev () insecure org
> > > > Subject: Nmap and Watchguard firewalls
> > > >
> > > > Hi. I don't know if this is the appropriate place to send this
> > > > email so i apologize in advance.
> > > >
> > > > I have an issue where i'm running an nmap scan against my interent
> > > > router(cisco). This router sits in front of a Watchguard firebox X
> > > > firewall. Whenever i run the scan, the fingerprint that I get back
> > > > is the Watchguard itself. This happens when I run it against my
> > > > home network(or any host outside the firewall). It always comes
> > > > back as Watchguard. 
> > > >
> > > > I run nmap with the -vv sS -O switches against the ip of the host.
> > > >
> > > > I've run nmap from a Windows xp sp1 box and a RedHat Enterprise
> > > > Linux box. Same result. 
> > > >
> > > > Also, the linux box is not NAT/PATed by the firewall or router. The
> > > > router does no NAT. The firewall is running an smtp and dns proxy.
> > > > All the other services are stateful packet inspection.
> > > > Watchguard has been silent on the issue but it seems the firebox x
> > > > is doing some rewriting but I can't tell for sure.
> > > > When i run ethereal from the nmap host, i can see the packets going
> > > > to the destination ok. However, at the router, when i run a packet
> > > > filter, i see nothing going to the destination i'm nmaping or the
> > > > source nmap host. 
> > > >
> > > > I was wondering if you knew of any isses with nmap and Watchguard.
> > > > I apologize again if this is the wrong place to email this or for
> > > > wasting your time. 
> > > >
> > > > Thank you
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Sent through the nmap-dev mailing list
> > > > http://cgi.insecure.org/mailman/listinfo/nmap-dev



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Sent through the nmap-dev mailing list
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