UPNP gateway management under Linux

1. Install Perl UPNP library by:
sudo apt-get install -y libnet-upnp-perl

2. Download igdctl.pl or router.pl (depend the source)
and make it executable with:
chmod +x xxx.pl

3.) Just make a port forwarding now :)
./igdctl.pl -a -e 4332 -i 4332 -I 192.168.0.5 -P TCP

Ref:
A smart router administration tool
myDEBlog » Administrating your gateway device via UPnP