mysql設置對外訪問

 

報錯：Host is not allowed to connect to this MySQL server解決方法

先說說這個錯誤，其實就是我們的MySQL不允許遠程登錄，所以遠程登錄失敗了，解決方法如下：

在裝有MySQL的機器上登錄MySQL mysql -u root -p密碼

[root@localhost ~]# mysql -u root -p 
Enter password: 

執行use mysql;

mysql > use mysql;

 

執行update user set host = '%' where user = 'root';這一句執行完可能會報錯，不用管它。

執行FLUSH PRIVILEGES;

 

全部命令

[root@localhost ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 8.0.11 MySQL Community Server - GPL

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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> update user set host = '%' where user = 'root';
Query OK, 1 row affected (0.06 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> 

 

 

經過上面4步，就可以解決這個問題了。
注: 第四步是刷新MySQL的權限相關表，一定不要忘了，我第一次的時候沒有執行第四步，結果一直不成功，最后才找到這個原因。

 

如果以上還不能解決問題，可以嘗試

報錯：authentication plugin 'caching_sha2_password

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root';

以上兩步驟基本可以解決 mysql對外訪問了