What is CrowdSec?
CrowdSec is an open-source, collaborative cybersecurity platform where a global community of users crowdsource threat intelligence in real time. IPs and domains reported as malicious by one community member are shared with all participants, creating a living blocklist deployed by web servers, reverse proxies, CDNs, and cloud infrastructure worldwide. With millions of active CrowdSec agents deployed globally, their blocklist reaches an enormous share of internet infrastructure.
Why CrowdSec flags legitimate domains
- One or more CrowdSec community members reported your IP or domain for attack behaviour
- Your server was identified as the source of brute-force, scanning, or exploit attempts
- A compromised application on your hosting triggered attack detection from multiple sensors
- Your shared hosting IP was reported by neighbours experiencing attacks from the same block
- Automated CrowdSec scenarios flagged behavioural patterns associated with your traffic
What a listing means for your business
The crowdsourced nature of CrowdSec means your domain can be blocked across millions of servers simultaneously once a listing is established. Because CrowdSec is deployed at the infrastructure level (web servers, proxies, firewalls), so users are blocked before any request reaches your application.
How BrandsDefender gets you delisted
We verify that your domain is clean, prepare the evidence CrowdSec needs, file the false positive dispute through the right channel and follow up until the flag is removed. No cure, no pay.
Frequently asked questions
How quickly does a CrowdSec listing propagate?
CrowdSec blocklist updates are distributed in near-real-time to all community participants. A new listing can be active on millions of CrowdSec-protected servers within minutes.
Can I appeal a CrowdSec listing?
CrowdSec provides a blocklist appeal process. Successful appeals require demonstrating that your IP or domain is no longer a threat source. Our team prepares the evidence and manages the appeal through CrowdSec's process.