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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 14.8k 719

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 254 228

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

    Crowdsec bouncer written in golang for firewalls

    Go 198 59

Repositories

Showing 10 of 132 repositories
  • 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 14,824 MIT 719 223 (1 issue needs help) 78 Updated Sep 12, 2026
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub's past year of commit activity
    Python 254 MIT 228 121 (5 issues need help) 85 Updated Sep 12, 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
    18 MIT 23 0 35 Updated Sep 12, 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 7 Updated Sep 11, 2026
  • cs-openresty-bouncer Public

    CrowdSec bouncer for OpenResty

    crowdsecurity/cs-openresty-bouncer's past year of commit activity
    Shell 23 MIT 7 9 4 Updated Sep 11, 2026
  • cs-nginx-bouncer Public

    CrowdSec bouncer for Nginx

    crowdsecurity/cs-nginx-bouncer's past year of commit activity
    Shell 67 MIT 14 13 2 Updated Sep 11, 2026
  • crowdsec-skill Public

    CrowdSec Skill : Install, configure, debug and operate crowdsec

    crowdsecurity/crowdsec-skill's past year of commit activity
    Shell 24 MIT 2 4 1 Updated Sep 11, 2026
  • lua-cs-bouncer Public
    crowdsecurity/lua-cs-bouncer's past year of commit activity
    Lua 19 MIT 25 18 6 Updated Sep 11, 2026
  • cs-haproxy-spoa-bouncer Public

    HAProxy spoe filter for CrowdSec - WAF and IP protection

    crowdsecurity/cs-haproxy-spoa-bouncer's past year of commit activity
    Go 21 MIT 4 8 10 Updated Sep 11, 2026
  • 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 52 99 41 16 Updated Sep 11, 2026
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