UPDATE 19:54 PDT -0700 (srn): We were down completely for about 20 minutes because I thought the IP was not black holed due to the bgp daemon not being notified of the configuration change. I reloaded the configuration change but this broke the routing table. Eventually I restarted the router and it was back to normal.
Our upstream black holed the offending IP so we should be OK for now. I am really sorry about this. This is the first time we have experienced a DDOS with the current router. I will review our configuration with Luke and with our upstream and try to figure out what I was doing wrong.
UPDATE 19:27 PDT -0700: The blackhole rule did not work properly. I (srn) have contacted our upstream provider for assistance and am continuing to work on it.
UPDATE 18:48 PDT -0700: it has been temporarily resolved; it would have been faster except I (srn) had trouble looking up how to take care of it. We will be following up with the targeted customer.
We are currently experiencing an incoming SSDP attack. The owners are currently working to resolve the situation. We will post updates as we have them.
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