In the major distros, Fedora and Ubuntu and OpenSuSE, a lot of packages, some of which aren't used by most users, sometimes default iptables rules, sometimes no

In the major distros, Fedora and Ubuntu and OpenSuSE, a lot of packages, some of which aren't used by most users, sometimes default iptables rules, sometimes no iptables rules at all. In newer, less friendly but more tech oriented distros (these aren't opposing forces, but in Linux they're misunderstood to be) like Arch, a lot less.