Add block IP address to Firewalld

I would like to see a method to add a drop or reject for a particular IP address. I’ve been doing this from the command line. This would be particularly helpful for certain addresses that get banned by fail2ban over and over. I don’t like to get too aggressive with F2B rules when it comes to email logins. But when I find an obvious dictionary attack it is nice to make it permanent.

Thank you very much for the ‘List Firewalld Rules’ button! Very helpful.