MySQLでアカウントのIP制限条件を変更する方法を詳しく解説

mysql> GRANT SELECT ON MyDB.* TO LimitIP@'192.168.%' IDENTIFIED BY 'LimitIP';
Query OK, 0 rows affected (0.01 sec)
 
mysql> GRANT INSERT ,UPDATE,DELETE ON MyDB.kkk TO LimitIP@'192.168.%';
Query OK, 0 rows affected (0.00 sec)
 
mysql> 
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
 
mysql> 
 
mysql> show grants for LimitIP@'192.168.%';
+----------------------------------------------------------------------------------------------------------------+
| Grants for LimitIP@192.168.%                     |
+----------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'LimitIP'@'192.168.%' IDENTIFIED BY PASSWORD '*72DDE03E02CC55A9478A82F3F4EBE7F639249DEC' |
| GRANT SELECT ON `MyDB`.* TO 'LimitIP'@'192.168.%'                |
| GRANT INSERT, UPDATE, DELETE ON `MyDB`.`kkk` TO 'LimitIP'@'192.168.%'           |
+----------------------------------------------------------------------------------------------------------------+
3 rows in set (0.00 sec)
 
mysql>

mysql> select user, host from mysql.user where user='LimitIP';
+---------+-----------+
| user | host  |
+---------+-----------+
| LimitIP | 192.168.% |
+---------+-----------+
1 row in set (0.00 sec)
 
mysql> update mysql.user set host='192.168.103.17' where user='LimitIP';
Query OK, 1 row affected (0.02 sec)
Rows matched: 1 Changed: 1 Warnings: 0
 
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
 
mysql> select user, host from user where user='LimitIP';
ERROR 1046 (3D000): No database selected
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
 
Database changed
mysql> select user, host from user where user='LimitIP';
+---------+----------------+
| user | host   |
+---------+----------------+
| LimitIP | 192.168.103.17 |
+---------+----------------+
1 row in set (0.00 sec)
 
mysql> show grants for LimitIP@'192.168.103.17';
+---------------------------------------------------------------------------------------------------------------------+
| Grants for LimitIP@192.168.103.17                     |
+---------------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'LimitIP'@'192.168.103.17' IDENTIFIED BY PASSWORD '*72DDE03E02CC55A9478A82F3F4EBE7F639249DEC' |
+---------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
 
mysql>

mysql> select * from mysql.db where user='LimitIP'\G;
*************************** 1. row ***************************
     Host: 192.168.%
     Db: MyDB
     User: LimitIP
   Select_priv: Y
   Insert_priv: N
   Update_priv: N
   Delete_priv: N
   Create_priv: N
   Drop_priv: N
   Grant_priv: N
  References_priv: N
   Index_priv: N
   Alter_priv: N
Create_tmp_table_priv: N
  Lock_tables_priv: N
  Create_view_priv: N
  Show_view_priv: N
 Create_routine_priv: N
 Alter_routine_priv: N
   Execute_priv: N
   Event_priv: N
   Trigger_priv: N
1 row in set (0.00 sec)
 
ERROR: 
No query specified
 
mysql> select * from mysql.tables_priv where user='LimitIP'\G;
*************************** 1. row ***************************
  Host: 192.168.%
   Db: MyDB
  User: LimitIP
 Table_name: kkk
 Grantor: root@localhost
 Timestamp: 0000-00-00 00:00:00
 Table_priv: Insert,Update,Delete
Column_priv: 
1 row in set (0.00 sec)
 
ERROR: 
No query specified

mysql> show grants for LimitIP@'192.168.%';
ERROR 1141 (42000): There is no such grant defined for user 'LimitIP' on host '192.168.%'
mysql> 
mysql> 
mysql> update mysql.db set host='192.168.103.17' where user='LimitIP';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
 
mysql> update mysql.tables_priv set host='192.168.103.17' where user='LimitIP';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
 
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
 
mysql> show grants for LimitIP@'192.168.103.17';
+---------------------------------------------------------------------------------------------------------------------+
| Grants for LimitIP@192.168.103.17                     |
+---------------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'LimitIP'@'192.168.103.17' IDENTIFIED BY PASSWORD '*72DDE03E02CC55A9478A82F3F4EBE7F639249DEC' |
| GRANT SELECT ON `MyDB`.* TO 'LimitIP'@'192.168.103.17'                |
| GRANT INSERT, UPDATE, DELETE ON `MyDB`.`kkk` TO 'LimitIP'@'192.168.103.17'           |
+---------------------------------------------------------------------------------------------------------------------+
3 rows in set (0.00 sec)
 
mysql>