MySQL连接不上错误:Host is not allowed to connect to this MYSQL server

回答: 当出现MySQL连接不上错误"Host is not allowed to connect to this MySQL server"时，有几种可能的解决方法。首先，可以尝试使用改表法来解决。在localhost的电脑上登录MySQL，然后在"mysql"数据库的"user"表中将"host"项从"localhost"改为"%"。这样可以允许远程登录。\[1\]

另外一种解决方法是通过阿里云打开3306端口。如果你在阿里云部署的服务器和MySQL，需要在阿里云的安全组中添加3306端口。这样可以允许远程访问MySQL。\[2\]

此外，还可以在数据库的配置中设置允许远程登录。通过登录阿里云的SSH，并登录数据库，使用MySQL数据库，将root用户的host字段改为%，默认情况下是localhost，只能本地连接，改为%后就可以远程连接了。然后刷新权限，即可实现远程访问。\[2\]

总结起来，解决MySQL连接不上错误"Host is not allowed to connect to this MySQL server"的方法包括改表法、打开3306端口和修改数据库配置。根据具体情况选择适合的方法进行解决。\[1\]\[2\]\[3\]
#### 引用[.reference_title]
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