centos firewall

centos firewall 防火牆開端口

firewall-cmd --zone=public --add-port=49152-65535/udp --permanent

firewall-cmd --list-ports

firewall-cmd --reload

firewall-cmd --state

systemctl status firewalld

systemctl start firewalld

禁止開機啟動

systemctl disable firewalld.service 

移除指定端口：

firewall-cmd --permanent --remove-port=123/tcp

若遇到無法開啟

先用：systemctl unmask firewalld.service 

然後：systemctl start firewalld.service