Sorry if I'm being a bit daft, but what's a DDOS attack?
It's an organised attempt to disrupt internet communication of a business. It is possible because stupid w**kers the world over don't bother to install a firewall and downlaod dubious software. At a pre-arranged point in time the software contacts the site flooding it.
Don't think that this is the problem here as the crash was immediate and apart from the time clock being wrong etc. the connection was ok after I got back on.