Didn't know CrowdSec until recently, but I'm quite impressed. Thought I'd share: I'm protecting my Jellyfin and audiobookshelf via nginx logs for a few days now and it's very promising, especially the proactive blocking via the global community list.
Now looking for a nice GUI (alerts/stats/unbanning) since the official panel's pricing isn't for home users. Please only recommend tools you've actually used (I know how to Kagi 😊!).