centos7、centos6防火牆的配置

centos7 1.查看防火牆命令 firewall-cmd --state systemctl status firewalld 2.開啓防火牆 3.關閉防火牆 4.設置防火牆開機啓動  systemctl enable firewalld 5.設置防火牆開機禁止啓動 systemctl disable firewalld 補充說明：systemctl systemctl是CentOS7的服務管

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