how to do NAT exemption on cisco router

[yong khang NG]

Hi forumers'

It's obvious to know how ASA doing NAT 0, how to do the conditional NAT in order the router not translating the IP address.

thank you

Noel

[parviz_nasirov]

Hi,

The better way to exlude some traffic from nat just create acl with sourse and destionatin and specify that acl in nat 0 command.

[Harish Balakrishnan]

Hello Noel,

Create acl with the source and destination ipu do not want to translate and deny that in acl and permit any  other traffic which u want to get translated..create your nat using that ACL.. u r done..

eg: access-list natacl deny ip 192.168.1.0 0.0.0.255 any

     access-list natacl permit ip  192.168.2.0 0.0.0.255 any

ip nat inside list natacl

So whatever traffic getting generated from 192.168.1.0 will not get natted but 192.168.2.0 does.

hope it helps

Harish.

[John Peterson]

Hi,

I was also told you could use route-maps. Which way would you recommand?