Destination NAT on ASA

Unanswered Question
Aug 14th, 2008


I am trying to configure an ASA (8.0.3) to intercept all smtp traffic coming from a dmz greylisting smtp server and then re-write the destination ip to the inside smtp server.

For example my dmz greylist smtp server has an ip of and is trying to send smtp out to Internet host - I'd like to intercept that and re-write the destination ip to my inside host of and then let him process the smtp packet.

Is this possible with the ASA?



I have this problem too.
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acomiskey Thu, 08/14/2008 - 09:38

Should look something like this...

static (inside,dmz) netmask

melchib Thu, 08/14/2008 - 09:43

Ok...I got that if I'm just interested in rewrtiting for a single host. What I'm looking to do is if sends to any host on tcp port 25 to rewrite the destination to Unfortunately the static statement doesn't allow an 'any' keyword eg.:

static (inside,dmz) tcp any 25 25 netmask



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