IF your computer is behind a router, the following is possible:

1-Your router IS UPnP capable:
 a-If the UPnP feature is enabled on your router, Toinkit configures automatically.
 b-If the UPnP feature is NOT enabled on your router, you need to enable it.
For most D-Link routers, the UPnP feature is located under Tools tab => Misc button.
For a D-Link screen shot please click HERE.

For most Linksys routers, the UPnP feature is located under Administration tab => Management tab.
Instructions for your particular Linksys model can be found HERE.

2-Your router IS NOT UPnP capable:
  This requires a port number to be configured on your router for Toinkit. The recommended port numbers are 80, 81, 443, 1180, 9818 and 12368.
For most D-Link routers, port opening feature is located under Advanced tab => Virtual Server button.
For a D-Link screen shot please click HERE.

For most Linksys routers, the UPnP feature is located under Applications & Gaming tab => Port Range Forwarding tab.
Instructions for your particular Linksys model can be found HERE.

Once you configured a port on your router, click on the Toinkit icon in the system tray, then click "Configure Port" and select the same port on the dropdown menu.