centos7 查看，关闭，打开防火墙命令

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最新推荐文章于 2023-04-04 09:44:37 发布

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本文介绍了如何在 CentOS 7 中临时开启和关闭firewalld防火墙，并区分了不同命令的效果。重点讲述了如何确保防火墙在重启后保持关闭状态，以及对应的 systemctl 命令：systemctl disable firewalld。

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[root@localhost bin]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2020-10-14 20:47:45 EDT; 50min ago
     Docs: man:firewalld(1)
Main PID: 6267 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─6267 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

Oct 14 20:47:44 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
Oct 14 20:47:45 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.
[root@localhost bin]#
[root@localhost bin]# systemctl stop firewalld
[root@localhost bin]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Wed 2020-10-14 21:41:01 EDT; 2s ago
     Docs: man:firewalld(1)
Process: 6267 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)
Main PID: 6267 (code=exited, status=0/SUCCESS)

Oct 14 20:47:44 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
Oct 14 20:47:45 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.
Oct 14 21:41:00 localhost.localdomain systemd[1]: Stopping firewalld - dynamic firewall daemon...
Oct 14 21:41:01 localhost.localdomain systemd[1]: Stopped firewalld - dynamic firewall daemon.
[root@localhost bin]# systemctl start firewalld
[root@localhost bin]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2020-10-14 21:41:17 EDT; 3s ago
     Docs: man:firewalld(1)
Main PID: 8128 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─8128 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

Oct 14 21:41:17 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
Oct 14 21:41:17 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.
[root@localhost bin]#

上面打开和关闭防火墙都是临时的，重启电脑后又会恢复到默认的状态。假如先关闭了防火墙，然后输入reboot重启centos7，重启后再执行查看防火墙的命令会发现防火墙还是打开的状态。

如果想重启后防火墙还是处于关闭的状态，得使用命令：

sudo systemctl disable firewalld。

查看防火墙的状态的命令为：sudo systemctl status firewalld。

打开防火墙的方式有两种，一种是打开后重启会恢复回原来的状态，命令为：sudo systemctl start firewalld；另一种是打开后重启不会恢复到原来的状态，命令为：sudo systemctl enable firewalld，这种方式输入命令后要重启系统才会生效。

关闭防火墙的方式也有两种，和打开相对应，命令分别为

sudo systemctl stop firewalld

sudo systemctl disable firewalld。