查询是否可以远程访问：

select * from mysql.user where host=% and user=MysqlUserName;

1.允许远程访问

grant all privileges on *.* to MysqlUserName@'%' identified by 'MysqlPassword' with grant option;

flush privileges；

2.取消远程访问

revoke all on *.* from MysqlUserName@'%';

flush privileges;