nagios server blocked

[Bryan Irvine]

I've got a nagios server that checks to see if the listening port is
open.  I'm getting this error:
Host 'nagios-host' is blocked because of many connection errors;
unblock with 'mysqladmin flush-hosts'

I've googled and there's options to use max_connection_errors=1000000

My (very rough) estimate is that this will last a about 1 year before
the nagios server gets blocked again.  What's the best way of dealing
with this?

-B