[root@test ~]# systemctl stop firewalld

[root@test ~]# systemctl disable firewalld

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

Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.

[root@test ~]# yum list all iptables*

已加载插件：fastestmirror

Loading mirror speeds from cached hostfile

 * base: mirrors.neusoft.edu.cn

 * extras: mirrors.tuna.tsinghua.edu.cn

 * updates: mirrors.sina.cn

已安装的软件包

iptables.x86_64                                   1.4.-.el7                           @base

可安装的软件包

iptables.i686                                     1.4.-.el7                           base

iptables-devel.i686                               1.4.-.el7                           base

iptables-devel.x86_64                             1.4.-.el7                           base

iptables-services.x86_64                          1.4.-.el7                           base

iptables-utils.x86_64                             1.4.-.el7                           base 

[root@test ~]# yum install iptablesyum install iptables-services.x86_64 -y

[root@test ~]# systemctl start iptables

[root@test ~]# systemctl status iptables

● iptables.service - IPv4 firewall with iptables

   Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled)

   Active: active (exited) since 五 -- :: CST; 9s ago

  Process:  ExecStart=/usr/libexec/iptables/iptables.init start (code=exited, status=/SUCCESS)

 Main PID:  (code=exited, status=/SUCCESS)

8月  :: test systemd[]: Starting IPv4 firewall with iptables...

8月  :: test iptables.init[]: iptables: Applying firewall rules: [  OK  ]

8月  :: test systemd[]: Started IPv4 firewall with iptables.

[root@test ~]# systemctl enable iptables

Created symlink from /etc/systemd/system/basic.target.wants/iptables.service to /usr/lib/systemd/system/iptables.service.