连接mysql时报：message from server: "Host '***.***.***.***' is not allowed to connect to this MySQL server

处理方案：

1、先用localhost方式连接到MySQL数据库，然后使用MySQL自带的数据库mysql;

          use mysql； 

2、执行：select host from user where user = 'root';  发现，host的值就是localhost。

     所以将它的值改掉：update user set host='%' where user = 'root'; 

3、修改完成后，执行：flush privileges;  

     将修改内容生效，再次配置时，用IP地址或者localhost 就都能正常连接到MySQL数据库了。

操作如下：

mysql> use mysql

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Database changed

mysql> select host from user where user = 'root';

+-----------+

| host      |

+-----------+

| localhost |

+-----------+

1 row in set (0.00 sec)

mysql> update user set host='%' where user = 'root';

Query OK, 1 row affected (0.00 sec)

Rows matched: 1  Changed: 1  Warnings: 0

mysql> select host from user where user = 'root';

+------+

| host |

+------+

| %    |

+------+

1 row in set (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql>