UPnP forwarding can be used to set up public services on your network. Windows XP can modify those entries via UPnP when UPnP function is enabled by selecting Yes.
1.  Select the Service from the pull-down menu.
2.  If the Service you need is not listed in menu, please click the Service Management button to add the new Service name, and enter the Protocol,      
     External Prot and Internal Port. Click the Add to List button. Then, click the Save Setting button or click the Exit button.
3.  Enter the Host Name or IP Address of the server that you want the Internet users to access, then enable the entry.
     Click the Add to List button, and configure as many entries as you would like. You also can Delete selected application.

Click the Save Settings button to save the settings, click the Cancel Changes button to undo your changes, click the Show Tables to see the details.