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crowdsec

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

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  1. 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 10.7k 517

  2. hub Public

    Main repository for crowdsec scenarios/parsers

    Python 202 179

  3. cs-firewall-bouncer Public

    Crowdsec bouncer written in golang for firewalls

    Go 136 47

Repositories

Showing 10 of 117 repositories
  • hub Public

    Main repository for crowdsec scenarios/parsers

    Python 202 MIT 179 92 (3 issues need help) 44 Updated Jul 14, 2025
  • plugins Public Forked from opnsense/plugins

    OPNsense plugin collection

    PHP 1 BSD-2-Clause 719 0 0 Updated Jul 13, 2025
  • crowdsec-docs Public

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

    MDX 33 84 43 11 Updated Jul 11, 2025
  • crowdsec-service-api-sdk-python Public

    Service API Python SDK

    Python 1 MIT 0 0 1 Updated Jul 11, 2025
  • sec-lists Public

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

    14 MIT 22 0 2 Updated Jul 11, 2025
  • cs-nginx-bouncer Public

    CrowdSec bouncer for Nginx

    Shell 54 MIT 10 10 0 Updated Jul 11, 2025
  • cs-openresty-bouncer Public

    CrowdSec bouncer for OpenResty

    Shell 16 MIT 6 6 3 Updated Jul 11, 2025
  • cs-haproxy-spoa-bouncer Public

    EXPERIMENTAL: HAProxy spoe filter for CrowdSec - WAF and IP protection

    Go 7 MIT 2 7 5 Updated Jul 11, 2025
  • Lua 13 MIT 13 17 4 Updated Jul 11, 2025
  • connectors Public Forked from OpenCTI-Platform/connectors

    OpenCTI Connectors

    Python 0 Apache-2.0 490 0 0 Updated Jul 11, 2025