부제: firewalld를 명령 한 줄로 조회하고 규칙을 여닫는다firewall-cmd --state # 방화벽 동작 여부firewall-cmd --get-default-zone # 기본 존 확인firewall-cmd --list-all # 현재 존의 전체 규칙runningpublicpublic (active) target: default icmp-block-inversion: no interfaces: enp6s18 sources: services: cockpit dhcpv6-client ssh ports: protocols: forward: yes masquerade: no forward-ports: source-ports: icmp-..