DDOS attacks have happening a lot in the past months, this is something we had to mitigate and have been doing for a while now. We automatically block thousands of IP addresses, from know botnet IP's. But additionally we're blocking IP addresses which display strange behaviour.
Since 2:00 this morning we are once again under attack by a botnet from hundreds of different IP addresses. This time they're trying to brute-force attack passwords.
As far as we are aware this is not causing outages.