Change is one of those things, that without realising, can begin to get the better of you.  I realised this after I finally decided to take a look at firewalld.  The thought of having to learn a new way to do things when I was already happy with iptables meant that I kept putting it off.

Once you master the basic command options, you are away and it is for the most part self-explanatory.

So here are a few links to get you started;

• For good basic usage this link will get you off on the right foot – http://www.certdepot.net/rhel7-get-started-firewalld/
• For a more in-depth look at whats possible – https://fedoraproject.org/wiki/FirewallD