查看端口是否打开firewall-cmd--query-port=80/tcp2.查看防火墙状态systemctlstatusfirewalldrunningstatus表示防火墙已经打开3.打开防火墙systemctlstartfirewalld开启防火墙服务firewalldstart5.关闭防火墙systemctlstopfirewalld-上述方法可能无法启用，可以先systemctlunmaskfirewalld.service然后systemctlstartfirewalld.service开启永久端口号firewall-cmd--add-port=80/tcp--permanent-提示success表示成功重新加载配置firewall-cmd--reload8。删除端口firewall-cmd--permanent--remove-port=8001/tcp
