sudo apt-get install shorewall
sudo apt-get remove ufw,gufw
sudo cp /usr/share/doc/shorewall/examples/Universal/* /etc/shorewall/
sudo vi /etc/default/shorewall #change startup (startup=1)
sudo shorewall check #looks for errors
#error 43 params permission 640 fix with...
sudo chmod 644 params
sudo shorewall check #s/b ok now
sudo /etc/init.d/shorewall start
Note: It's a very good idea to do all of this off line after downloading 'Shorewall'.

