Sooo - time has settled a bit and we were hard working facing this DDoS. For your information, just let me summarize a bit of technical details:
By block 495 we got hit by a DDoS of around 300 MBit/s with around 1 Mio. Packets per second:
> Sum 135.587 flows/300s (451 flows/s), 271.176.000 packets/300s (903.920 packets/s), 10,103 GByte/300s (275 MBit/s)
At this point the DDoS trigger of our provider (Thanks for this!) was reached and every further DDoS was blocked immediately. During this short period they flooded us with around 300GB(!!!) of traffic:
We have noticed that the site was very slow during this attack. We are from the beginning running with cloudflare DDoS protection, but we were not able to serve all the miners who switched to altminer. We have added further resources to the webserver and are currently serving around 300.000 concurrent requests to the webserver without any problems. During reconfiguration you had a short downtime on the web only.
Looks like our work in the past just counted. Stratum mining was only affected for several seconds, but the server was able to cope with all the load.
Thanks for mining with altminer.net!
-a phi -o stratum+tcp://eu1.altminer.net:6667 -u WALLET -p c=LUX