[c-nsp] NAT on one interface

[Joe Maimon]

nat on a stick

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094430.shtml

Church, Charles wrote:

> Yeah, it's possible to policy route the traffic to a loopback that has
> nat inside configured on it, and then out the normal interface.  It's
> kludgy, but it'll work, I think.
> 
> 
> Chuck 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Michael Malitsky
> Sent: Wednesday, August 22, 2007 3:12 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] NAT on one interface
> 
> Hello,
> 
> I am trying to figure out if it's possible to configure NAT in IOS on
> just one interface.  Specifically, say I need to translate traffic flows
> between X.X.X.X and Y.Y.Y.Y.  Y.Y.Y.Y is reachable through one
> interface, that's my gateway to the "other" network.  However, X.X.X.X
> can be reached through multiple interfaces.  Normal NAT configuration
> requires me to specify a "nat inside" and a "nat outside" interfaces.  I
> can certainly specify the gateway interface to Y.Y.Y.Y as "nat outside",
> but I don't want to set a bunch of other interfaces as "nat inside" (nor
> do I want to involve them in NAT processing at all).  Is there any other
> way?
> 
> Thanks,
> Michael Malitsky
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