https://firewalld.org/2018/12/rich-rule-priorities
https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-using-firewalld-on-centos-7
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="80.82.77.18/24" reject'
firewall-cmd --reload
firewall-cmd --list-all
SOURCES:
https://virtualmin.com/node/57011 firewalld vs iptables + fail2ban problem
https://doxfer.webmin.com/Webmin/FirewallD