MySQL Error 1130 (HY000): Host 'YZY' is not allowed to connect to this MySQL

MySQL Error 1130 (HY000) occurs when the MySQL server denies access to a client based on its host name or IP address. In this case, the error message suggests that the host named 'YZY' is not allowed to connect to the MySQL server.

To resolve this issue, you can try the following steps:

1. Check if the host name or IP address is correct: Ensure that the host name or IP address you are using to connect to the MySQL server is accurate. Double-check for any typos or mistakes.

2. Grant privileges to the host: Connect to your MySQL server using a user account with administrative privileges. Run the following command to grant access to the 'YZY' host:

GRANT ALL ON your_database.* TO 'your_username'@'YZY' IDENTIFIED BY 'your_password';

Replace 'your_database', 'your_username', and 'your_password' with your actual database name, username, and password. This command grants all privileges on 'your_database' to 'your_username' when connecting from 'YZY'. You can adjust the privileges as needed.

3. Flush privileges: After granting privileges, run the following command to flush the privileges and apply the changes:

FLUSH PRIVILEGES;

4. Verify firewall settings: Ensure that there are no firewall rules blocking the connection from the host 'YZY'. Check both the MySQL server's firewall settings and any network-level firewalls that may be in place.

5. Check network connectivity: Verify that the host 'YZY' can reach the MySQL server over the network. Ensure there are no network issues or connectivity problems between the client and server.

By following these steps, you should be able to resolve the MySQL Error 1130 and allow the host 'YZY' to connect to the MySQL server.