阿里云服务器的CentOS7的MySQL5.7无法被远程访问使用的是php strom 自带的database工具访问失败提示：The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.这个错误，已经在安全组里添加了规则同时也修改了访问账户还请教如何正确的修改！
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