I have following scenario. I have inside server that is known via two public IP addresses. Let's say the one public IP - new is 188.8.131.52 and the old one is 184.108.40.206. The first IP should replace the second after a period of time.
I would like to translate requests for accessing this server based on their source IP address. So client with particular source address(220.127.116.11) and trying to access 18.104.22.168 should translate to 22.214.171.124 whereas remaining requests coming from other clients should left untouched.
In my topology, clients are connected through FR links to my 7600 router. And 7600 is connected to 6500 through its f0/0. Servers are behind the 6500. So in short
Clients > FR link < S1/0.23 7600 f0/0 > 6500 < server.
So big questions is how do I achieve solution for this scenario using NAT? Is policy NAT work in this scenario or static NAT with route map?
Can I use S1/0.23 as my outside interface and f0/0 as inside?