bind-addressは接続を絞るためのものなので外部からのアクセスを許可する場合には外す。¹⁾²⁾

/usr/local/etc/mysql/my.cnfを編集する

# コメントアウト
# bind-address = 127.0.0.1
OR
bind-address = 0.0.0.0

bind-address = 127.0.0.1

bind-address = 192.168.0.XXX

この場合、mysql -h 127.0.0.1 で接続できない

bind-address = 192.168.168.XXX

この場合、mysqlが起動しない

bind-address = 192.168.0.XXX
bind-address = 192.168.0.YYY

最後が有効

bind-address = 192.168.0.XXX 192.168.0.YYY

最初が有効

mysql> select user,host from mysql.user;
+------+-----------------------+
| user | host                  |
+------+-----------------------+
| root | 127.0.0.1             |
| root | ::1                   |
|      | localhost             |
| root | localhost             |
|      | localhost.localdomain |
| root | localhost.localdomain |
+------+-----------------------+

mysql> show databases;  
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| synctest           |
| test               |
+--------------------+

• すべてのホスト

mysql> grant all privileges on *.* to user1@"%" identified by 'パスワード' with grant option;

• LANのみに限定

mysql> grant all privileges on dbname.* to user1@"192.168.0.%" identified by 'パスワード' with grant option;

• なお、上記だと作成されるのは外部接続のみなので、同様にLocalhostにも作成する。³⁾

mysql> grant all privileges on dbname.* to user1@"localhost" identified by 'パスワード' with grant option;

mysql> drop user 'user'@'localhost';