1.centos7自带了firewall,而不是iptables:

  关闭firewall:

service firewalld stop

  或者:

systemctl stop firewalld

  禁止firewall:

systemctl mask firewalld

  下面是替换成iptables操作:

yum -y install iptables-services

  开机启动:

systemctl enable iptables

  启动iptables:

systemctl start iptables

that\’it…

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