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Re: Assessing a machine with 2 NICs
From: Tim <tim-pentest () sentinelchicken org>
Date: Sun, 11 Sep 2005 20:28:46 -0400

Lets say we have a machine running critical business applications
connected to the enterprise network on 2 NICs. From an assessment/audit
point of view, is it necessary to scan both NICs using assessment tools
like NMap and Nessus? Will both scan results produce the same findings
(as in same ports and services open)?

If you want to be sure, you really do need to scan both.  Many services,
at least in the Unix world, allow one to easily specify which IP or
interface the service should listen on.  Many lazy administrators don't
bother to do this, and some services don't support it, but that's no

If these two NICs are actually on the same network segment, then perhaps
you don't need to worry about scanning both, but in any other situation,
or if you are paranoid about missing a service, definately do.


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