We’ve banned over 900 different IP addresses today for password guessing. A typical day would see about 350. When this number rises like this the usual cause is new Windows malware circulating.
Please be sure your anti-virus and anti-malware software is up to date. If you’re running Windows and NOT running MalwareBytes, I highly recommend doing so. It catches much malware that traditional anti-virus programs don’t find and when a customer brings an infected computer to me, nine times out of ten MalwareBytes will find an infection after Norton, Kaspersky, and others have failed.
I have no affiliation with MalwareBytes other than using it on my own computers and customers computers successfully, that is to say I get no financial incentive from them, but if your machine is clean then it’s less stress on our network and I appreciate that.