from > https://firewalld.org/
Who is using it?
firewalld is used in the following Linux distributions as the default firewall management tool:
RHEL 7 and newer CentOS 7 and newer Fedora 18 and newer SUSE 15 and newer OpenSUSE 15 and newer Available for several other distributions
Applications and libraries which support firewalld as a firewall management tool include:
NetworkManager libvirt podman docker (iptables backend only) fail2ban
i’m content with it because it’s tightly integrated with NetworkManager