No Nat Control

Posted on 2009-02-08
Medium Priority
Last Modified: 2012-08-14
We have an ASA 5540.  I issued the command "sh run nat-c" and it comes back "no nat control'.  From my understanding this means that traffic should pass through the firewal w/o nat transaltion.  The problem is that I couldn't ping from one subnet to antoher, and the subnets are out different interfaces on the ASA.  As soon as I put in a nat exempt statement in the ASA on the source interface it worked fine.  Why would this be if the "no nat control" command is issued??  Thanks for your help.
Question by:jiggin23
1 Comment
LVL 32

Accepted Solution

rsivanandan earned 500 total points
ID: 23590844
It probably meant that you don't have either nat command or nat exclusion. One thing to remember is that even if you want to have 'non-natted' services, you need to nat it. What it means is, nat it to the same ip.

2 ways of getting around it. Say you have an ip which you don't want to nat, then you still nat it, but you nat it to itself, or include a nat exclusion command. Both works the same way.

First -> static (inside, outside) netmask

Second -> nat exclusion which you obviously know.


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