UPnP is a convenient way for programs to forward ports without you having to pull up your router’s web interface and forward ports manually. Unfortunately, some programs that require port forwarding don’t support UPnP – that’s where UPnP PortMapper comes in. This application takes care of port forwarding for you, right from your desktop. If your IP address changes, you don’t need to log into your router and change your port forwarding rules – you can have the application update them for you. If you visit a friend’s house and join their network, you don’t have to ask for their router’s password to forward ports – just fire up the application and activate your preset rules. Installation UPnP Port Mapper is written in Java, so you’ll need the free Java Runtime Environment installed to run it. After installing Java, you can download UPnP Port Mapper from SourceForge . In addition to Windows, this application also works on Mac OS X and Linux. UPnP Port Mapper communicates wi...