一、firewalld开启、关闭防火墙

以下命令在linux系统CentOS7中操作开启关闭防火墙

# 查询防火墙状态
systemctl status firewalld.service
# 开启防火墙
systemctl start firewalld.service
# 开机自启动防火墙
systemctl enable firewalld.service


# 关闭防火墙
systemctl stop firewalld.service
# 禁止firewalld服务在系统启动时自动启动
systemctl disable firewalld.service

1、查看防火墙状态

• active（running）：说明防火墙打开
• disavtive（dead）：说明防火墙关闭

执行日志：

[root@localhost ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: active (running) since 四 2025-06-05 01:54:51 CST; 10min ago
     Docs: man:firewalld(1)
 Main PID: 3489 (firewalld)
    Tasks: 2
   CGroup: /system.slice/firewalld.service
           └─3489 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

6月 05 01:54:51 localhost.localdomain systemd[1]: Starting firewalld - dynamic fir....
6月 05 01:54:51 localhost.localdomain systemd[1]: Started firewalld - dynamic fire....
6月 05 01:54:52 localhost.localdomain firewalld[3489]: WARNING: AllowZoneDrifting ....
6月 05 01:54:58 localhost.localdomain firewalld[3489]: WARNING: ALREADY_ENABLED: ssh
6月 05 01:55:07 localhost.localdomain firewalld[3489]: WARNING: AllowZoneDrifting ....
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)

6月 05 01:54:51 localhost.localdomain systemd[1]: Starting firewalld - dynamic fir....
6月 05 01:54:51 localhost.localdomain systemd[1]: Started firewalld - dynamic fire....
6月 05 01:54:52 localhost.localdomain firewalld[3489]: WARNING: AllowZoneDrifting ....
6月 05 01:54:58 localhost.localdomain firewalld[3489]: WARNING: ALREADY_ENABLED: ssh
6月 05 01:55:07 localhost.localdomain firewalld[3489]: WARNING: AllowZoneDrifting ....
6月 05 02:05:48 localhost.localdomain systemd[1]: Stopping firewalld - dynamic fir....
6月 05 02:05:50 localhost.localdomain systemd[1]: Stopped firewalld - dynamic fire....
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]# 
[root@localhost ~]# ^C
[root@localhost ~]#