User blog comment:ZeroExalted/Is anyone here an expert on DDOS or other hacking issues...?/@comment-1381391-20120311162652/@comment-1906486-20120315192523

Try discussing with your ISP, to see if they can trace or block these flood attacks. Since it needs to route through their servers, they should at least be able to monitor everything.

I've yet to really experience this, but seems someone is determined over something.