Se volete provare un firewall per Ubuntu semplice da configurare, potete provare:
Uncomplicated Firewall (ufw)
- http://gufw.tuxfamily.org [EN]
- https://wiki.ubuntu.com/UncomplicatedFirewall [EN]
- http://it.wikipedia.org/wiki/Uncomplicated_Firewall [IT]
- http://en.wikipedia.org/wiki/Uncomplicated_Firewall [EN]