### 1. 查看防火墙状态 ```bash systemctl status firewalld.service ``` ### 2. 关闭防火墙 ```bash systemctl stop firewalld.service ``` ### 3. 禁用防火墙 ```bash systemctl disable firewalld.service ``` ### 4. 启用防火墙 ```bash systemctl enable firewalld.service ``` ### 5. 开启防火墙 ```bash systemctl start firewalld.service ```