CentOS7 has been out for a few years. I personally still use the 6 series. I mainly feel that the operations of these commands have changed too much, such as the firewall view and switch. It is always a habit to memorize the 6 series commands. 8 is not far away and you cannot hold on to 6 all the time. Now I will record the firewall related commands to facilitate my own search.
Check the running status of the firewall
firewall-cmd --state
Stop firewall
systemctl stop firewalld
Disable firewall from starting at boot
systemctl disable firewalld
Detailed operations:
启动服务：systemctl start firewalld.service 关闭服务：systemctl stop firewalld.service 重启服务：systemctl restart firewalld.service 显示服务的状态：systemctl status firewalld.service 在开机时启用：systemctl enable firewalld.service 在开机时禁用：systemctl disable firewalld.service 查看服务是否开机启动：systemctl is-enabled firewalld.service 查看已启动的服务列表：systemctl list-unit-files|grep enabled 查看启动失败的服务列表：systemctl --failed 查看版本： firewall-cmd --version 查看帮助： firewall-cmd --help 显示状态： firewall-cmd --state 查看所有打开的端口： firewall-cmd --zone=public --list-ports 更新防火墙规则： firewall-cmd --reload 查看区域信息: firewall-cmd --get-active-zones 查看指定接口所属区域： firewall-cmd --get-zone-of-interface=eth0 拒绝所有包：firewall-cmd --panic-on 取消拒绝状态： firewall-cmd --panic-off 查看是否拒绝： firewall-cmd --query-panic
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