Policy NAT Configuration

Unanswered Question
Oct 12th, 2007
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Dear All,

I have an issue configuring policy NAT. my design is attached

I've One SMTP Server with two IP adresses. the new is and the old one the first IP should replace the second after a period of time.

I would like to translate the old 192.xxx IP to the fisrt one for my customers who still use this old wheras customers who started using the new IP should not be translated.

My SMTP Is in my DMZ and my customer are at the outside (Internet)

Could some one help me configure this policy NAT.


I have one SMTP server with

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thefindjack Fri, 10/12/2007 - 11:47
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I may not totally understand what you are trying to do but I think you need to do something like this.

access-list nat2_acl extended permit ip host X.X.X.X 255.255.X.X

^^^Where the X's are the IP address range cust B is using (policy NAT based on destination)

nat (inside) 2 access-list nat2_acl

global (outside) 2

Please rate if this helps. Thanks


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