How do I port Forward on Cisco 871

[jsandau]

This is a simple questionm but I always seem to have problems when trying to configure port forwarding on cisco routers. I've even tried the instructions I have for a cisco 1811, but no luck. I have a cisco 871 and a computer that has VNC installed on it. I want to be able to access that computer from out side the network using the external ip address and port 5950. People outside the network will be able to open vnc viewer and type in *external ip address*:5950 and it will be directed to the computer with a static internal ip address of 10.12.0.10. What commands do I use to do this?

Thanks,

[Jennifer Halim · Accepted solution]

Command should be:

ip nat inside source static tcp 10.12.0.10 5950 5950

OR/ if you are using the external interface IP, then:

ip nat inside source static tcp 10.12.0.10 5950 interface 5950

Hope this helps.

[jsandau]

I tired

ip nat inside source static tcp 10.12.0.10 5950 5950

but I still can't use VNC from an outside computer. Don't I need to and stuff to ACL?

[Jennifer Halim]

Do you have any ACL applied to the external interface of the router?

If you do, then yes, you would need to allow that in the ACL:

access-list permit tcp any host eq 5950

[jsandau]

I ended up resetting the router and configuring it via CLI, without ACLs. CCP added in too may ALCs. Thanks for your help.