How to forward a port on CISCO Router 2811

Its really easy to forward a port at your CISCO router 2811. If you have configured your server for simple NAT and looking to forward a port from outside world to inside of your network then you are at a right location. Check the command under given;

ip nat inside source static tcp [Private IP Address] [internal port] [Public IP Address] [external port] extendable

Let me explain the command given above;

If we want to forward port 21 from our external IP address (public) to our port 2931 of internal IP address then we will issue the following command:

ip nat inside source static tcp 2931 21 extendable

In this way all the inbound traffic coming to our public IP will be forwarded to

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