Host ‘xxx‘ is not allowed to connect to this MySQL server 解決方法

Host 'xxx' is not allowed to connect to this MySQL server 解決方法

參考文章：

（1）Host 'xxx' is not allowed to connect to this MySQL server 解決方法

（2）https://www.cnblogs.com/kldn208/p/11668435.html

備忘一下。