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Re: Company Firewall's IP Address
From: Steve Cooper <steve () nuclear-monkeys co uk>
Date: 13 Nov 2002 21:40:17 +0000

On Tue, 2002-11-12 at 22:09, tony tony wrote:
I was doing security research on the internet at work yesterday....when all of
a sudden I got a pop up advertisement that stated that I was broadcasting my IP
address to the entire internet.  It then showed a screen with my IP address
which was the the external IP interface of one of our companies firewalls. 

It just bothers me that someone would be able to determine the IP address of
our firewall that easily.  It seems to me that our firewall should operate in a
more stealth mode.  Our firewall administrator said it is not technically
possible to do this.  What is your take?…I am not a checkpoint firewall guru…so
I do not know.   All I know is that if I was a hacker, I would love to hammer
away on an ip address that represented a firewall. 

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Your admins right, your IP has to be known in order for information to
be returned from the internet to you and a companys external IP's are
easy to find with legal tools and websites like samspade.org or whois
queries with domain registrars.
It's the ports that are open on your IP address that are the real
danger, in order to hack your PC an attacker will need some ports open
so they can send information through those ports. If your firewall is
securely configured and you don't host any web or mail servers that
allow trafic inside then you should be ok.

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