阿里云服務器的CentOS7的MySQL5.7無法被遠程訪問使用的是php strom 自帶的database工具訪問失敗提示：The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.這個錯誤，已經在安全組里添加了規則同時也修改了訪問賬戶還請教如何正確的修改！