NAT for specific src-to-dst adresses

[eduardo.viero]

Can I use NAT to determine that when a souce address try to reach just a specific destination address, a new address (made by NAT) could be used instead the real source address?

[yusuff]

Yes, you can use Extended ACL with NAT and map to another address or even keep the same;

eg;

ip nat pool ourpool 200.1.1.10 200.1.1.20 netmask 255.255.255.0

ip nat inside source route-map nonat pool ourpool overload

!

route-map nonat permit 10

match ip address 175

!

access-list 175 permit ip 10.1.1.0 0.0.0.255 172.16.1.0 0.0.0.255

access-list 175 deny ip any any

As you can see from above example, we will NAT to 200.1.1.x range IF the source is 10.1.1.0 destined to172.16.1.0.

HTH

R/Yusuf