From mboxrd@z Thu Jan  1 00:00:00 1970
From: Payal Rathod <payal-netfilter@scriptkitchen.com>
Subject: problems with firewall, DMZ
Date: Sat, 7 Aug 2004 08:49:38 -0400
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To: Netfilter ML <netfilter@lists.netfilter.org>

Hi,
I have got a pair of 2 public IPS to test from my ISP. I have assigned
both for my gateway machine and one of them is Natted to a test mail server
at DMZ. I can access the mail server from outside world as,
telnet <external ip> 25
it works fine

My internal users can access it as,
telnet 10.10.10.2 25
it works fine,

But I cannot do 
telnet <external ip> 25
from inside.
Same for POP3 and HTTP.
I cannot do it even from the gateway(firewall) machine itself.

What must be the problem?

With warm regards,
-Payal