Good contribution! Although I must honestly say that the firewall my gateway uses does not support UPnP, so this is useless to me.
Should this be here or in Lite-C Contributions? This forum seems to apply to non-code assets.
Lite-C Contributions is for contributions of purely Lite-C code. This is a plugin, so I think it doesn't belong there...
EDIT: Scratch that, I just saw this description of the Lite-C Contributions forum:
This forum is for code snippets or external DLL implementations to the lite-C game programming language.
I think it's pretty clear where this belongs, then.