Every time I check my server logs, I've got some IP address hitting my server a few thousand times in a row with a random username. Usually it has several requests per second for a few hours at a time.
Each time I find this, I block the IP address in IIS which stops it until they switch IP addresses.
Is there a way to automatically have the IP blocked after a set number of failed logins? My FTP server doesn't get much "real" traffic so I'm not concerned with locking out actual users.
Thanks!