I'm trying to directly use iptables instead of firewalld to manage firewall rules. However
systemctl start iptables prints:
[root@centos-new ~]# systemctl start iptables Failed to issue method call: Unit iptables.service failed to load: No such file or directory.
I'm running a newly installed CentOS 7 so it is hardly possible to let something important be deleted by me. What could be the possible problem?