How to configure port forwarding?
Let us give an example. Assume that you want to open ports 6000-6100 TCP ports for an application runs on of your PCs. This PC has static IP address 192.168.2.100. After login the router, you can go to General Setup -> NAT -> Port forwarding. Then you need to fill in IP addresses and port numbers you want to open. Afterwards, click Add. Please refer to the picture below.