IMO just learn the real iptables commands. They're seriously one-liners with just a few args, and then you'll know how to set up a basic firewall on most distros. https://fedoraproject.org/wiki/How_to_edit_iptables_rules is the fedora guide. There are others. Here's how to disable firewalld: https://fedoraproject.org/wiki/FirewallD#Using_static_firewa...

Note here that if everyone just spent the 5 minutes it takes to learn the few basic iptables commands, we wouldn't have ufw and firewalld and firehol and vuurmuur and Crazy Bob's Super Simple VBA-to-XML iptables rule generator. Every attempt at making iptables "easy", I consider harmful, as it's a basic systems administration skill that people continually hurt themselves by not learning. iptables is not hard, but all of these wrappers make it hard by introducing their own dumb syntax while adding complexity and quashing any hope of a standard interface between distros to control networking rules, which iptables already was before they tried to "fix" it.