CentOS 7开放端口和关闭防火墙

开放端口

永久的开放需要的端口

sudo firewall-cmd --zone=public --add-port=3000/tcp --permanent
sudo firewall-cmd --reload

之后检查新的防火墙规则
firewall-cmd --list-all

关闭防火墙

systemctl disable firewalld
systemctl stop firewalld
systemctl status firewalld

开启防火墙

systemctl enable firewalld
systemctl start firewalld
systemctl status firewalld

临时关闭防火墙,重启后会重新自动打开

systemctl restart firewalld

检查防火墙状态

firewall-cmd --state
firewall-cmd --list-all