Open a web browser like internet explorer or Netscape.

Enter the ip address of your router in the address bar of your browser. In the picture above the address bar has http://www.google.com in it. Just replace all of that with the ip address of your router. By default the ip address should be set to 192.168.2.1.

You should see a box prompting you for your username and password. Enter your username and password now. By default both the username and password are blank. Click the Ok button to log in to your router.

Click the NAT link on the left hand side of your screen. Clicking NAT will drop down a submenu.

In this submenu click the Special Application link.

Put the trigger port you setup in the PortTrigger application in the Trigger Port box. Use the Trigger Type radio button to select the protocol type you chose in the PortTrigger application. Enter the ports to forward into the Public Ports box. These ports can be entered as a list like 23,45,67, a range like 400-500, or combination of both like 23,45,400-600. Use the Public Type radial buttons to select the protocol type of the ports to forward. Put a check in the Enable box.

When you are finished adding these configurations, click the Apply button at the bottom of your screen. Be sure to save your settings and reboot your router before these changes take effect.

And that's it! You are done!