service iptables stop
//禁止开机启动
chkconfig iptables off

stop  iptables.service
Failed to stop iptables.service: Unit iptables.service not loaded.

//临时关闭
systemctl stop firewalld
//禁止开机启动
systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.

yum install -y iptables-services
//关闭防火墙
service iptables stop
Redirecting to /bin/systemctl stop  iptables.service
//检查防火墙状态
service iptables status
Redirecting to /bin/systemctl status  iptables.service
鈼iptables.service - IPv4 firewall with iptables
   Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled)
   Active: inactive (dead)