Step 1 Open the web browser and type the IP address of the device in the address bar (default is 192.168.1.1). Press Enter .
Step 2 Type the username and password in the login page, the default username and password are both admin, then click OK to log into the device.
Step 3 Click Advanced Setup->NAT, and select the current Virtual Circuit you use.
Step 4 Click Virtual Server to open Virtual Server configuration page.
1. You can choose the option Application and select a service in the list, and then the ports for the server will be put into the entry automatically.
2. You also can type a server name on Application bar and type the ports for the server manually to configure custom server.
Step 5 Type the IP address of the computer the service is using on.
Step 6 Click Save button to save the settings.
You´d better assign a static IP address for your computer, so the Virtual Server entry will take effect all the time.