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RE: Nmap and Watchguard firewalls
From: "Kern, Tom" <tkern () CHARMER COM>
Date: Tue, 24 May 2005 14:06:09 -0400

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



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