Re: Basic NAT / Firewall Question

["List Spam" <listspam () gmail com>]

Google for "firewalking".

As to if the firewall forwards all traffic to the NAT'ed IP in your
scenario, that depends on how the ACLs are set on the public IP.

On 8/18/06, thatch <leethatcher () gmail com> wrote:
> forgive me if this question seems pretty basic but could anyone tell explain
> this to me.
>
> i'm performing a practice assesment and i have located an IP of a web based
> mail server (OWA).  this server is sitting behind a hardware firewall (say
> PIX or Checkpoint)that is NATing the IP Address to an internal non-routable
> address.  Now, if i use a tool such as Nmap to scan that external IP are my
> scan results influenced by the Firewall.  Do firewalls when NATing take all
> traffic from the external IP and pass it to the internal nertwork and expect
> the server to have the remaing services closed down or do they only take
> traffic destined for a port and drop everything else.  if it's the later,
> when i scan am i only scaning the 1 port that is allowing traffic to be
> forward to it?
>
> Is there a way of determining if the firewall is blocking the traffic to the
> other ports or if the Server has been locked down and is blocking them?
>
> Any help would be appreciated.
>
> Regards
>
> Thatch
>
>
> --
> View this message in context: http://www.nabble.com/Basic-NAT---Firewall-Question-tf2128555.html#a5874111
> Sent from the Security Basics forum at Nabble.com.
>
>
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This list is sponsored by: Norwich University

EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE
The NSA has designated Norwich University a center of Academic Excellence 
in Information Security. Our program offers unparalleled Infosec management 
education and the case study affords you unmatched consulting experience. 
Using interactive e-Learning technology, you can earn this esteemed degree, 
without disrupting your career or home life.

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