Firewall Wizards: RE: How to test a gateway / NAT for ports allowed

["Vinicius Moreira Mello" <vinicius () lineone net>]

Hi,

      Assuming that you are inside the network of the NAT gateway, you can
use nmap to find out what IS blocked. A single 'nmap <target>' should show
you what is 'filtered'. You can test what is not blocked using individual
ports, such like:

# nmap -P0 -sS -p 6667 --packet_trace  <targets>

--
Vinicius

> -- Original Message --
> Reply-To: jago25_98 () catholic org
> From: "Jago Pearce" <jago25_98 () hotmail com>
> To: firewall-wizards () honor icsalabs com
> Subject: [fw-wiz] How to test a gateway / NAT for ports allowed
> Date: Sat, 08 Nov 2003 21:02:45 +0000
>
> ... and ports blocked. It seems IRC ports may be blocked but I >need to
be sure. How can I use nmap to find what ISN'T blocked?

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