“Host ‘xxx.xxx.xxx.xxx’ is blocked because of many connection errors; unblock with ‘mysqladmin flush-hosts’Connection closed by foreign host.”

If you get the above error for a genuine client connection to the MySQL server. You should consider to increase the MySQL variable ‘max_connect_errors’ which is 10 by default.

If you can afford to restart the MySQL server, enter below to your my.cnf and restart the MySQL service.

[mysqld]

max_connect_errors = 1000

If you can’t afford to restart the MySQL server, follow below steps.

In MySQL pormpt,

show variables like ‘%error%’ ;

+——————–+——-+
| Variable_name      | Value |
+——————–+——-+
| log_error          |       |
| max_connect_errors | 10  |
| max_error_count    | 64    |
| slave_skip_errors  | OFF   |
+——————–+——-+

set global max_connect_errors = 1000 ;

show variables like ‘%error%’ ;

+——————–+——-+
| Variable_name      | Value |
+——————–+——-+
| log_error          |       |
| max_connect_errors | 1000  |
| max_error_count    | 64    |
| slave_skip_errors  | OFF   |
+——————–+——-+

That’s it