OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.
Warning: This is still alpha quality software, don't rely on it (yet) for your computer security.
sudo apt-get install build-essential python-dev python-setuptools libnetfilter-queue-dev python-qt4
cd opensnitch
sudo python setup.py install
sudo opensnitch
grep -r TODO opensnitch | cut -d '#' -f 2 | sort -u
This project is copyleft of Simone Margaritelli and released under the GPL 3 license.