本文介绍 CentOS 7.x 操作系统中防火墙状态查询、打开、关闭、启用和禁用的命令。

目录

• 查看防火墙状态
• 关闭防火墙
• 禁用防火墙
• 启用防火墙
• 打开防火墙

查看防火墙状态

[root@01 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since 一 2019-01-14 19:16:21 CST; 1min 30s ago
     Docs: man:firewalld(1)
 Main PID: 743 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─743 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

1月 14 19:16:20 01 systemd[1]: Starting firewalld - dynamic firewall daemon...
1月 14 19:16:21 01 systemd[1]: Started firewalld - dynamic firewall daemon.

关闭防火墙

[root@01 ~]# systemctl stop firewalld.service 
[root@01 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since 一 2019-01-14 19:19:22 CST; 29s ago
     Docs: man:firewalld(1)
  Process: 743 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)
 Main PID: 743 (code=exited, status=0/SUCCESS)

1月 14 19:16:20 01 systemd[1]: Starting firewalld - dynamic firewall daemon...
1月 14 19:16:21 01 systemd[1]: Started firewalld - dynamic firewall daemon.
1月 14 19:19:21 01 systemd[1]: Stopping firewalld - dynamic firewall daemon...
1月 14 19:19:22 01 systemd[1]: Stopped firewalld - dynamic firewall daemon.

此命令只能暂时关闭防火墙，一旦系统重启则防火墙又会再次打开。

禁用防火墙（防止系统重启后再次打开）

[root@01 ~]# systemctl disable firewalld.service 
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.

启用防火墙

[root@01 ~]# systemctl enable firewalld.service 
Created symlink from /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service to /usr/lib/systemd/system/firewalld.service.
Created symlink from /etc/systemd/system/basic.target.wants/firewalld.service to /usr/lib/systemd/system/firewalld.service.

打开防火墙

[root@01 ~]# systemctl start firewalld.service 
[root@01 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since 一 2019-01-14 19:27:48 CST; 9s ago
     Docs: man:firewalld(1)
 Main PID: 2973 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─2973 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete FORWARD --destination 192.168.122.0/24 --o...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete FORWARD --source 192.168.122.0/24 --in-int...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete FORWARD --in-interface virbr0 --out-interf...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete FORWARD --out-interface virbr0 --jump REJECT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete FORWARD --in-interface virbr0 --jump REJECT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete INPUT --in-interface virbr0 --protocol udp...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete INPUT --in-interface virbr0 --protocol tcp...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete OUTPUT --out-interface virbr0 --protocol u...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete INPUT --in-interface virbr0 --protocol udp...PT' failed:
1月 14 19:27:49 01 firewalld[2973]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -w --table filter --delete INPUT --in-interface virbr0 --protocol tcp...PT' failed:
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