WaifUPnP

UPnP Port Forwarding for Java couldn't get any easier!
WaifUPnP is an extermely lightweight Java library that allows you to

  • Open/Close TCP/UDP ports
  • Check if there's an UPnP router available
  • Check if a port is already mapped
using literally 1 line of code, as it should be!

It's as easy as

UPnP.openTCP(<port number here>);

Compatibility

Java 5 or newer

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Limitations

WaifUPnP is a very basic implementation of UPnP, that only scans for the default gateway, and can only open/close ports.
While this is enough for most people, if you need a full implementation of UPnP, you should take a look at Cling.

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