CentOS 7 防火墙 FireWall

1. 状态查询

firewall-cmd --state

2. 启动防火墙

systemctl start firewalld

3. 查看已经开放的端口

firewall-cmd --list-ports

4. 添加新端口(示例为81)

firewall-cmd --zone=public --add-port=81/tcp --permanent

5. 重启防火墙

firewall-cmd --reload

6. 关闭端口

firewall-cmd --zone=public --remove-port=81/tcp --permanent

7. 关闭防火墙

systemctl stop firewalld.service