Upnp

References

• MiniUPnP Project — home of upnpc

Install

• Download miniupnpc package
• untar it, compile and install it:

make
sudo make install

Usage

• List redirections:

upnpc -l

• Add a new redirections:

upnpc -a 129.19.3.106 9922 22 TCP     # Let UPNP router forward connections on 9922 to 129.19.3.106:22 (TCP)

• Get public IP address (i.e. address of the ADSL router):

PUBLICIP=$(upnpc -l|perl -lne 'print for /ExternalIPAddress *= *([0-9]+.[0-9]+.[0-9]+.[0-9]+)/')

Another solution using an external server:

PUBLICIP=$(wget http://automation.whatismyip.com/n09230945.asp -q -O -)

As a sidenote, to get local IP address:

IPETH0=$(ifconfig eth0 | perl -lne 'print for /inet addr:([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/')      # eth0
IPWLAN0IP=$(ifconfig wlan0 | perl -lne 'print for /inet addr:([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/')     # wlan0