Migrate from iptables to firewalld
Following implementation of the Podman reload workaround described at https://github.com/containers/podman/issues/5431#issuecomment-1022121559, all Nest hosts have been migrated to firewalld one-by-one, resolving issues along the way such as NAT reflection and missing kernel modules. Compatibility with libvirt, Podman, and fail2ban has been confirmed, but CRI-O has not yet been tested.
firewalld is much nicer to work with from Puppet than iptables.
Closes #36 (closed)