Comment by tluyben2

I saw this behaviour from MS/Azure IP space about 3 weeks ago; there were so many requests that some dynamic pages started to get slower because of it, so I gave in and added Cloudflare in front. It stopped minutes later as per the logs on my servers. Cloudflare blocked 10000s of visits in short timespans. Not sure how to really handle this well without something like cloudflare ; I would block like OP but I cannot risk that for paying b2b clients. We had no complaints at all by the way.