Anubis is designed to protect websites from AI scraper bots, Anubis primarily focuses on parameters like the user agent sent with the request and looks for oddities in the connection. “Known good” and harmless clients are always accepted, and “Known bad” clients are always denied. Now the same tool is used to get protection from a DDoS attack: https://fabulous.systems/posts/2025/05/anubis-saved-our-websites-from-a-ddos-attack/