CrowdSec is an open-source collaborative intrusion prevention system that analyses visitor behavior to detect attacks and auto-block malicious IPs. It integrates with web servers, firewalls, and edge proxies.

CrowdSec is fully available and usable in China because it is self-hosted. Developers can deploy it inside Chinese servers, integrate with domestic firewalls and CDN logs, and benefit from global threat intelligence community updates without cross-border limitations.

The information regarding service availability in China is provided for general reference purposes only. Due to the dynamic nature of network conditions and regulatory environments, the actual accessibility of these services may vary over time and by location. Users are advised to verify the current status independently.