Out of the box, Linux is one of the most secure computing platforms you will ever use. For most users, that out-of-the-box experience is good enough. For some, however, there is plenty of fine-tuning that can be done to make the desktop distribution even more secure or more flexible. If you’ve made the switch to elementary OS Freya, you’ll be pleased to know there’s a new GUI tool that makes working with the firewall quite easy.
Like most all Linux distributions, Freya works with iptables to lock down the platform.