"In this article I share some of the basics of setting up a
Linux firewall using the iptables tool. It's important to note that
configuring firewalls is slightly different depending on which
flavour you use.
"If you are just starting out and need to enable a firewall on
your Linux system, I suggest you try a basic tool such as lokkit
(which is available in major flavours including Fedora/RedHat and
Ubuntu). It is a very simple tool that walks you through a
configuration. To use this, run the command: gnome-lokkit..."