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crowdsec

README.md

CrowdSec

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<TL;DR>

CrowdSec is a free, modern, and collaborative behavior detection engine coupled with a global IP reputation network. It stacks on fail2ban's philosophy but is IPV6 compatible and 60x faster (Go vs. Python) and uses Grok patterns to parse logs. CrowdSec is engineered for modern Cloud / Containers / VM-based infrastructures (by decoupling detection and remediation). Once detected, you can remedy threats with various methods (firewall block, Nginx HTTP 403, Captchas, …) while sharing the aggressive IP to CrowdSec Network and improving everyone's security further.

OSS Projects

  • CrowdSec - The open-source and participative IPS able to analyze visitor behavior & provide an adapted response to all kinds of attacks. It also leverages the crowd power to generate a global CTI database to protect the user network.
  • CrowdSec Hub: Host scenarios and parsers for CrowdSec Agent
  • Home Assistant CrowdSec Addons: CrowdSec for home-assistant.io
  • Firewall Bouncer: Crowdsec bouncer written in golang for firewalls

Pinned Loading

  1. crowdsec crowdsec Public

    CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

    Go 13.1k 596

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 228 209

  3. cs-firewall-bouncer cs-firewall-bouncer Public

    Crowdsec bouncer written in golang for firewalls

    Go 182 50

Repositories

Showing 10 of 129 repositories
  • crowdsec-docs Public

    CrowdSec Documentation: Comprehensive guides, tutorials, and references for installing, configuring, and using CrowdSec, an open-source cybersecurity platform. Contributions welcome!

    crowdsecurity/crowdsec-docs’s past year of commit activity
    MDX 43 97 41 11 Updated Apr 21, 2026
  • cs-aws-waf-bouncer Public

    Crowdsec bouncer for AWS WAF

    crowdsecurity/cs-aws-waf-bouncer’s past year of commit activity
    Go 8 MIT 6 11 19 Updated Apr 21, 2026
  • crowdsec-service-api-sdk-python Public

    Service API Python SDK

    crowdsecurity/crowdsec-service-api-sdk-python’s past year of commit activity
    Python 2 MIT 0 0 1 Updated Apr 21, 2026
  • crowdsec Public

    CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

    crowdsecurity/crowdsec’s past year of commit activity
    Go 13,101 MIT 596 207 (1 issue needs help) 63 Updated Apr 21, 2026
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub’s past year of commit activity
    Python 228 MIT 209 110 (4 issues need help) 89 Updated Apr 21, 2026
  • sec-lists Public

    Repository to track keywords & patterns lists used by crowdsec parsers and scenarios

    crowdsecurity/sec-lists’s past year of commit activity
    16 MIT 22 0 7 Updated Apr 21, 2026
  • cs-firewall-bouncer Public

    Crowdsec bouncer written in golang for firewalls

    crowdsecurity/cs-firewall-bouncer’s past year of commit activity
    Go 182 MIT 50 30 (1 issue needs help) 12 Updated Apr 20, 2026
  • cs-cloudflare-worker-bouncer-install Public template

    Cloudflare Worker allowing to easily install the Cloudflare worker bouncer

    crowdsecurity/cs-cloudflare-worker-bouncer-install’s past year of commit activity
    JavaScript 1 0 0 1 Updated Apr 20, 2026
  • proto-cloudflare-autonomous-bouncer-deployer Public archive

    GUI allowing to deploy or clear the autonomous worker bouncer on a given cloudflare account

    crowdsecurity/proto-cloudflare-autonomous-bouncer-deployer’s past year of commit activity
    JavaScript 0 MIT 0 0 0 Updated Apr 20, 2026
  • crowdsec-yaml-schemas Public
    crowdsecurity/crowdsec-yaml-schemas’s past year of commit activity
    4 1 3 1 Updated Apr 17, 2026
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