关闭firewalld：
systemctl stop firewalld
systemctl mask firewalld使用iptables服务:
#开放443端口(HTTPS)
iptables -A INPUT -p tcp --dport 443 -j ACCEPT
#保存上述规则
service iptables save
#开启服务
systemctl restart iptables.service一切正常。
标签：iptables,CentOS,service,443,firewalld,start,systemctl,firewall From： https://blog.51cto.com/u_12374018/6195610