NAT problems

From: Wade Edwards (wade.edwards@xxxxxxxxxxxxxxxxxxx)
Date: Mon Sep 17 2001 - 15:18:35 GMT-3


   
I am having a problem with NAT that I would like to get cleared up.

>From my understanding of how NAT works on a Cisco router is that you can
specify a range of IP addresses to NAT to, traffic to NAT and inside and
outside interfaces.

The problem I am having is that I need only certain traffic to be
translated and not everything from those IP addresses.

I am using a pool of address to NAT to and once the router sees traffic
from the source IP addresses to the destination IP addresses the source
IP addresses get placed in the NAT translation table and from then on
ALL traffic get translated to that IP address and not just the traffic
(i.e. source and destination) specified in the access-list.

Am I missing something like an IOS issue or do I not understand what the
access-list is used for in the NAT command.

Thanks for your help.
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