WP-DenyHosts

How it works.

The plugin monitors failed login attempts, if the limit is reached the users IP is added to a local banlist. The user is now blocked and can no longer attempt to login.

Every 24 hours the plugin will upload the blocker IPs and download a fresh list of all IPs blocked accross the network in the last 7 days.

If an IP is blocked on 3 or more servers its added the the global ban list and will be blocked on all servers using the plugin.