开启防火墙
systemctl start firewalld
调整3306端口外网可访问
firewall-cmd --zone=public --add-port=3306/tcp --permanent
重启防火墙
firewall-cmd --reload
关闭防火墙
systemctl stop firewalld
systemctl start firewalld
firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload
systemctl stop firewalld