Double translations - possible?

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Mar 26th, 2008
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I need to be able to have a host on Network-A to be able to connect to a router on Network-C - with Network-B in the middle.


Is it possible to NAT an IP from Network-A to Network-B - then NAT the resultant Network-B IP to an IP on Network-C?

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Jon Marshall Wed, 03/26/2008 - 13:02
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Hi


Assuming you mean NAT the source IP address then yes this is perfectly possible. You just set up your NAT translations on each router eg


Router A


ip nat inside source static 192.168.5.10 172.16.5.10


Router B


ip nat inside source static 172.16.5.10 10.1.1.5


where


192.168.5.0 is NET A

172.16.5.0 is NET B

10.1.1.0 is NET C


HTH


Jon

Joseph W. Doherty Wed, 03/26/2008 - 13:39
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BTW: It's also possible to double NAT on a single router, useful when two networks address space overlaps.

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