how to map port on router 831

[blin]

We have a cisco router 831 with V12.3 and would like to map the ftp port pointing to inside compuetr with ip 172.16.5.2. How to do that?

[Richard Burts]

This duplicates a question you posted on another forum.

I do not understand what you are attempting to accomplish when you say you want to map the ftp port pointing to inside computer. Can you explain what is the problem you are trying to solve?

HTH

Rick

[tekha · Accepted solution]

interface Ethernet0

ip nat inside

!

interface Ethernet1

ip nat outside

!

ip nat inside source static tcp 172.16.5.2 21 interface ethernet 1 21

[blin]

Hi

That is what I am looking for and it works. Thank you very much.

[jasiniaq1]

I assume your router does NAT and the external (public) IP address is dynamic?

Here is how I did it on c831 with IOS 12.3(4)T3 for port 80 (HTTP). Inside PC is 10.10.10.2 in my case:

ip nat inside source static tcp 10.10.10.2 80 interface Dialer1 80

[blin]

Thanks. it works.