I've spent some of my yesterday afternoon (a Sunday) with an important issue at work: I've got a call that a client's website is down.
It was weird because the machine's resources weren't exhausted (this isn't really a big site, it runs on a VPS with a dedicated CPU time package, no cloud native stuff) yet the site wasn't really responding.
Long story short after debugging the issue for a few hours we realised why the backend was responding but the frontend proxy was not: There were hundreds of connections just left open. A colleague with better pattern matching skills against my tired head found out in the logs that 90% of the requests were from one /16 IP range. Plugging an address into ipinfo.io showed this:
Company: Alibaba Cloud LLC
Fuckers couldn't keep their AI scraper from messing up everything.

