NAT on failover

[cs79]

Hi All,

Any idea on how to do a static port NAT on failover?

E.g

NAT 1.1.1.1 port 25 (IP on BRI interface) to 2.2.2.2 port 25 (one of the IP from primary interface IP range) ONLY when primary link fails and BRI comes up?

Need to do this to allow smtp connections during line failover.

Thanks in advance

 

[gconnect]

you may be able to use extended access-lists and route-maps with nat to achieve this. Look at my last post on here:

http://www.tek-tips.com/gviewthread.cfm/pid/557/qid/814130

and for the access-list use the host's ip and tcp port


-gC-

 

[cs79]

Hi GC,

Thanks for the quick reply. I am currently using route-maps for the NAT but my impression is that it will only perform the NAT when the traffic type matches the ACL.

For something like SMTP, wouldn't the translation need to be in place first even before it receives the first matching packet?