The BiPAC Serials are supporting UPnP now. If your PC has installed UPnP components, Windows will inform you automatically when the router is startup. The default icon named as 'DSL IGD'. If you double click the icon, you can enter the Web GUI directly. By default, Windows ME did not installed UPnP. User has to install (or enable) it. It seems no UPnP for Windows 2000 while Windows XP need to enable. The one advantage of UPnP is 'UPnP NAT Transversal'. If some applications is UPnP-aware, it can negotiate with router to open 'Virtual Server' ports implicitly, i.e. User did not need to configure the Virtual Server by himself.