Just a question: whitelist for manually added dynhosts on your website are updated once a day. But when? If IP updates twice a day or something like that or just changes after you did your update ... - the miners have still access? Maybe every whitelist entry have a TTL longer than a day? That would fix the problem. I noticed that today, one dynhost could not connect for some hours, dynhost was on your whitelist but ip was different (real and that from your last update).
Hello, dns resolving will be faster than that, maybe once per hour or even faster. Additionally, there will be special IP which you will call everytime you change IP on your side. Using this notification will be almost instant.
Whitelist is currently not enabled as site is not under ddos, but it is important to prepare everything to next ddos attempt.