centos7 open the firewall and open the specified port

https://www.cnblogs.com/bigfly277/p/11193829.html

 

centos7 open the firewall and the specified port

1, open the firewall

• First check firewall status:

firewall-cmd --state

• Open the firewall

systemctl start firewalld.service

• Set the boot from the start:

systemctl enable firewalld.service

• Restart the firewall:

systemctl restart firewalld.service

• Check whether the firewall state open:

firewall-cmd --state

• Check the firewall settings to boot from the start is successful:

systemctl is-enabled firewalld.service;echo $?

2, open port

开端口命令：firewall-cmd --zone=public --add-port=80/tcp --permanent
重启防火墙：systemctl restart firewalld.service
查看开启的所有端口:firewall-cmd --list-ports
命令含义：
 
--zone #作用域
 
--add-port=80/tcp  #添加端口，格式为：端口/通讯协议
 
--permanent   #永久生效，没有此参数重启后失效