阿里云服務(wù)器的CentOS7的MySQL5.7無法被遠(yuǎn)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(jīng)在安全組里添加了規(guī)則同時也修改了訪問賬戶還請教如何正確的修改！