One thing that is missing in Ubuntu is an easy way for a novice user to turn on and configure the firewall. It's bad enough to not have the firewall turned off by default. Even if you argue that Ubuntu is secure by default because it has no services listening on the network on first boot, that's not an excuse to leave the firewall turned off.
Ok, there is ufw (uncomplicated firewall) which I think it's nice because saves me all the hassle of messing with iptables when I don't have the time nor the mood to deal with it. But it's command-line based! Novice users don't really like or know how to use the terminal!
To end this problem, there's Gufw:
Gufw is an easy, intuitive, way to manage your Linux firewall. It supports common tasks such as allowing or blocking pre-configured, common p2p, or individual ports port(s), and many others! Gufw is powered by ufw, runs on Ubuntu, and anywhere else Python, GTK, and Ufw are available.
This project sounds nice to have in Ubuntu by default. In fact I liked it so much that I decided to contribute to it. So expect me to talk more about it in some future posts.