新装的 MySQL 不允许远程连接

新装的 MySQL 通常会出现这样的情况:无法远程连接,但是本地连接是正常的.

问题原因

新装的 MySQL 通常默认的用户是 root, 而为了安全起见, root 用户是不允许远程连接.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.04 sec)

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;
+-----------+-----------+
| user      | host      |
+-----------+-----------+
| mysql.sys | localhost |
| root      | localhost |
+-----------+-----------+
2 rows in set (0.00 sec)

解决办法

1. 暴力修改(不安全,不合理,不建议,也就不介绍了)
2. 新增一个对应权限的用户,并启用远程连接(安全、可靠、无污染).

# 新增用户及密码,并授予对应的权限
grant all privileges on yourDatabase.* to "yourUser"@"%" identified by "yourPassword";
# 刷新权限
flush privileges;