CentOS常见命令之防火墙

╰+攻爆jí腚メ 2023-02-15 10:07 16阅读 0赞

## 1. 查看、关闭、开启防火墙 ##

### 1.1 查看防火墙运行状态 ###

systemctl status firewalld

输出结果

● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
       Active: active (running) since 四 2020-06-04 14:33:47 CST; 28min ago
         Docs: man:firewalld(1)
     Main PID: 814 (firewalld)
        Tasks: 2
       CGroup: /system.slice/firewalld.service
               └─814 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

根据 **running** 得知，防火墙目前正在处于运行状态。

### 1.2 关闭防火墙 ###

systemctl stop firewalld.service

此时防火墙已关闭了。

使用防火墙的查看命令`systemctl status firewalld.service`查看。

● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
       Active: inactive (dead) since 四 2020-06-04 16:25:12 CST; 1min 37s ago
         Docs: man:firewalld(1)
      Process: 814 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)
     Main PID: 814 (code=exited, status=0/SUCCESS)

通过 **dead** 发现，防火墙服务已关闭。

### 1.3 开启防火墙 ###

systemctl start firewalld.service

此时防火墙又重新开启了。

使用防火墙的查看命令`systemctl status firewalld.service`查看。

● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
       Active: active (running) since 四 2020-06-04 16:30:41 CST; 47s ago
         Docs: man:firewalld(1)
     Main PID: 3125 (firewalld)
        Tasks: 2
       CGroup: /system.slice/firewalld.service
               └─3125 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

### 1.4 防火墙的其他操作 ###

*  开机禁用防火墙自启命令： `systemctl disable firewalld.service`
 *  防火墙随系统开启启动: `systemctl enable firewalld.service`