[CentOS] firewalld management on a headless server

[Mike]

Webmin used to be considered insecure, and people would scream and yell if
you suggested using it. Has that changed?

      mark


Ahh, I did not know of this.
Well, I'm back to suggesting OP take a little time and get comfortable with
firewall-cmd in the terminal. If we want our solid redhat clone then
systemd, NetworkManager, and firewalld are soldered into the foreseeable
future.