[c-nsp] NAT Shot in the Dark

[Peter Rathlev]

On Sat, 2010-12-11 at 16:09 -0600, Sean Granger wrote:
> I've moved a device from 192.168.1.110 to 192.168.35.110.
>  
> When hosts inside of the .1 subnet try to access it at the "old"
> address, how do I force them to go to the new address ... NAT on it's
> own doesn't seem to do the trick (outside local 192.168.1.110, global
> 192.168.35.110) ..... do I have to policy route this thing and force
> it out of the other vlan interface?
>  
> I know it's dirty either way, but my developers can't change all of
> the systems that directly address to the original IP in time and the
> move had to happen today.

Is there any way you could have the host still respond to the old
address, e.g. 192.168.1.110/32 bound to a loopback interface? In that
case you could use a host-route and proxy-arp to make the traffic go in
the right direction.

-- 
Peter