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CentOS7系统防火墙开关、状态与自启

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首先需要说明的是CentOS7使用的是firewalld.service,而不是iptables.service

[xf@xuexi ~]$ systemctl status firewalld.service   //查看防火墙状态

● firewalld.service - firewalld - dynamic firewall daemo

Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)  //红色标注的地方就是是否开机自启

Active: active (running) since 五 2018-09-07 14:00:58 CST; 18min ago

Docs: man:firewalld(1)

Main PID: 9907 (firewalld)

CGroup: /system.slice/firewalld.service

└─9907 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

9月 07 14:00:59 xuexi firewalld[9907]: WARNING: COMMAND_FAILED: \'/usr/sbin/....

Hint: Some lines were ellipsized, use -l to show in full.

[xf@xuexi ~]$ systemctl stop firewalld.service     //关闭防火墙

[xf@xuexi ~]$ systemctl start firewalld.service    //开启防火墙

[xf@xuexi ~]$ systemctl disable firewalld.service   //关闭开机自启

Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.

Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.

[xf@xuexi ~]$ systemctl enable firewalld.service   //打开开机自启

Created symlink from /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service to /usr/lib/systemd/system/firewalld.service.

Created symlink from /etc/systemd/system/multi-user.target.wants/firewalld.service to /usr/lib/systemd/system/firewalld.service.

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