When connecting to MySQL, I get a "Host is Blocked" error.

ERROR 1129 (HY000): Host 'host_name' is blocked because of many connection errors.
Unblock with 'mysqladmin flush-hosts'

A Host is Blocked error occurs when your server has received too many interrupted connection requests for your location. The default value of the max_connect_errors system variable is 100 connections in a short period of time.

If you are getting this error, ensure that your queries are not timing out and that your network connection is stable.

Check your network connection or revise your query.
Verify your login credentials and user permissions.
Verify that the hostname is correct and that you’ve created the database.