Actually spoke to my host which offers DDoS protection. Asked them why my site went down in the event of a DDoS. They said they checked out the server and saw no history of any DDoSes hitting the server (in addition to me checking)
Any WordPress website running without a proper cache configuration? I am just guessing …
Maybe it was the spoofed UDP flood which hit directly the IP? (for example, if exposed via A mail or MX records, if you run that service beside the web server on your VPS too, etc.)
Not exactly, but I believe it could be discussed. Otherwise, like If the ports were open, no Firewall on the origin host like UFW, the UDP requests were allowed, etc., again I am just guessing the scenarios.
How about the network?
Hopefully it was active and enabled.
Anyone else affected as far as you are running a VPS?
Would be good in future to install some kind of a monitoring service or agent, even the HetrixTools has got free and a good one to install the agent and get the alerts when anything occurs.