Cisco NAT issue

[CartoGraph]

Hello,

I'm facing an issue and I really don't know what's happening.

I'm working on 2 Cisco routers (Cisco 891 and Cisco C1111-8P). The running-config is identical on both routers.

I have a nat as follows.

ip nat outside source static tcp 10.10.10.10 12345 20.20.20.20 8888 extendable

My problem is that on 891 the NAT is working, but on C1111-8P it doesnt work.

What did I miss?

Thanks!

[paul driver]

Hello

You have static nat outside statement relating to a private ip address no so sure if this is just for example purposes anyway if nat outside is to be use the source address needs to be:

outside public ip - private ip

Example ip nat outside source static tcp 20.20.20.20 8888 10.10.10.10 1234 extendable

[Georg Pauwen]

Hello,

can you add 'add-route' to the statement ?

ip nat outside source static tcp 10.10.10.10 12345 20.20.20.20 8888 extendable add-route

[paul driver]

Hello
Just like to add
Nat add-route -is necessary if the nat router isn't aware of the specific natted address the outside ip is getting translated to,

[Georg Pauwen]

Just a thought: what is actually behind the inside IP address ? Certain applications might require the 'no-payload' keyword at the end of the static NAT entry, you might want to try that as well...