CrowdSec is an open-source cyber security tool. This plugin blocks detected attackers or display them a captcha to check they are not bots.

The official PHP bouncers library for the CrowdSec LAPI

Nope! A lightweight tool for monitoring your log files and dynamically blocking nuisance or malicious IPs based on easy to define, dynamic rules which you control

🔐 Antares Project Ban Management Component. Improve application security, using advanced ip and emails blocking with wildcards and whitelists.