centos如何關閉防火牆與連接埠

###关闭防火墙

systemctl stop firewalld.service

###查看防火墙状态

[root@rocketmq-nameserverB ~]# firewall-cmd --state

not running

###禁止firewalld开机启动

systemctl disable firewalld.service

firewall-cmd --state

firewall-cmd --remove-port=80/tcp --permanent  ##永久移除80端口

firewall-cmd --reload