解決MySQL Error (2013): Lost connection to MySQL server at 'reading initial communication packet',system error:0

未授權的原因，解決：

mysql數據庫中增加一條記錄
insert into user (host,user,password) values('%','admin','123456');


添加授權
GRANT ALL PRIVILEGES ON *.* TO 'admin'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;

刷新，使授權生效。
flush privileges;