Firewalld 서비스 시작[root@mnode ~]# systemctl restart firewalld.service Firewall 은 Pre-defined 된 Zone이 정의 되어 있다. [root@mnode ~]# firewall-cmd --get-zonesblock dmz drop external home internal public trusted workdrop: The lowest level of trust. All incoming connections are dropped without reply and only outgoing connections are possible.block: Similar to the above, but instead of simply dropping conne..