I am confused, I have to use firewallD or Iptables. Firewalld sits on top if iptables, so they're not in competition. It's probably easiest to just start with the official documentation, but for a ...

I've been asked by a friend to help with his small fleet; he's got 15-20 nodes that he wants to get iptables rules set up. They're all bare metal and with a bunch of hosting providerss so he doesn't ...