CentOS 8設置防火牆

啓動防火牆： systemctl start firewalld.service 關閉防火牆： systemctl stop firewalld.service 重啓防火牆： systemctl restart firewalld.service 開機啓用防火牆： systemctl enable firewalld.service 開機禁用防火牆： systemctl disable firew

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