[root@localhost conf]# systemctl stop firewalld打开防火墙
[root@localhost conf]# systemctl start firewalld禁用防火墙
[root@localhost conf]# systemctl disable firewalld启用防火墙
[root@localhost conf]# systemctl enable firewalld
[root@localhost conf]# systemctl stop firewalld打开防火墙
[root@localhost conf]# systemctl start firewalld禁用防火墙
[root@localhost conf]# systemctl disable firewalld启用防火墙
[root@localhost conf]# systemctl enable firewalld
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