关闭及停止使用 firewalld:

systemctl mask firewalld
systemctl stop firewalld

安装iptables:

yum install -y iptables-services

生效及iptables开机启动:

systemctl enable iptables
systemctl start iptables

  查看是否开机启动和状态:

systemctl list-unit-files|grep iptables
systemctl status iptables

 

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