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NAT with overlapping networks

Everything I read about overlapping networks talks about a solution that requires the router to see DNS requests. This is not logical since the NAT router is usually a border router and will not see most, if any, DNS requests.

Can it be implemented using two pools and two inside and outside nat statements that use different access-lists? Even though the router never sees DNS requests will it change the source and destination addresses of the matching packets that go through in both directions?


Re: NAT with overlapping networks

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

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