Router – Port Forwarding

You will need to have already set your interfaces to inside and outside using the commands,

ip nat ouside
ip nat inside

Once done you can add the command below. This would allow the IP to be accessed on port 23 via the IP address of the interface fa 0/0 using port 2333.

ip nat inside source static tcp 23 interface fastEthernet 0/0 2333

Note !! Remember that in the case above the syntax is for NAT`ing the source but also works the other way round, i.e NATs the destination.

Rick Donato

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