centos7 開啟防火牆后，無法遠程連接MySQL

1、數據庫沒有授權

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
FLUSH PRIVILEGES;
2、firewall防火牆沒有開放端口

添加端口

firewall-cmd --zone=public --add-port=3306/tcp --permanent
重啟防火牆

systemctl restart firewalld.service
查看所有開放的端口

firewall-cmd --list-ports

原文鏈接：https://blog.csdn.net/jiuzhibuguniao/java/article/details/80473656