mysql 远程访问不行解决方法 Host is not allowed to connect to this MySQL server

mysql> update user set host = '%' where user = 'root';
ERROR 1062 (23000): Duplicate entry '%-root' for key 1
mysql> select host,user from user;
+------------------+------+
| host             | user |
+------------------+------+
| %                | root |
| 127.0.0.1        | root |
| 192.168.33.110   | root |
| yunwei2.uid5a.cn | root |
+------------------+------+
4 rows in set (0.00 sec)

mysql> select host,user from user;
+------------------+------+
| host             | user |
+------------------+------+
| %                | root |
| 127.0.0.1        | root |
| 192.168.33.110   | root |
| yunwei2.uid5a.cn | root |
+------------------+------+
4 rows in set (0.00 sec)

mysql> grant all privileges on *.* to 'root'@'%' identified by 'uid5a827' with g                                                                                                 rant option;
Query OK, 0 rows affected (0.00 sec)

mysql> flush;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that                                                                                                  corresponds to your MySQL server version for the right syntax to use near '' at                                                                                                  line 1
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> grant all privileges on *.* to 'root'@'buy2.w98-e5.ezwebtest.com' identified by 'abcd1234' with grant option;
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

参考文章

http://till.iteye.com/blog/115659

若是你想链接你的mysql的时候发生这个错误：

ERROR 1130: Host '192.168.1.3' is not allowed to connect to this MySQL server

解决方法：
1。 改表法。多是你的账号不容许从远程登录，只能在localhost。这个时候只要在localhost的那台电脑，登入mysql后，更改 "mysql" 数据库里的 "user" 表里的 "host" 项，从"localhost"改称"%"

mysql -u root -pvmwaremysql>use mysql;mysql>update user set host = '%' where user = 'root';mysql>select host, user from user;

2. 受权法。例如，你想myuser使用mypassword从任何主机链接到mysql服务器的话。

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
若是你想容许用户myuser从ip为192.168.1.3的主机链接到mysql服务器，并使用mypassword做为密码
GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON *.* TO 'root'@'10.10.40.54' IDENTIFIED BY '123456' WITH GRANT OPTION;