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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

    Open-source IDS/IPS, WAF and bot detection for Linux, Windows, Docker and Kubernetes, with a crowdsourced blocklist of malicious IPs.

    Go 15.3k 754

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 264 243

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

    Crowdsec bouncer written in golang for firewalls

    Go 200 66

Repositories

Showing 10 of 132 repositories
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub's past year of commit activity
    Python 264 MIT 243 128 (7 issues need help) 56 Updated Oct 24, 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 25 0 33 Updated Oct 24, 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 53 103 41 28 Updated Oct 24, 2026
  • cs-apache2-bouncer Public

    Apache httpd access module for Crowdsec service

    crowdsecurity/cs-apache2-bouncer's past year of commit activity
    C 8 MIT 4 1 1 Updated Oct 23, 2026
  • crowdsec Public

    Open-source IDS/IPS, WAF and bot detection for Linux, Windows, Docker and Kubernetes, with a crowdsourced blocklist of malicious IPs.

    crowdsecurity/crowdsec's past year of commit activity
    Go 15,283 MIT 754 231 (1 issue needs help) 71 Updated Oct 23, 2026
  • cs-custom-bouncer Public

    CrowdSec bouncer to use custom scripts

    crowdsecurity/cs-custom-bouncer's past year of commit activity
    Python 17 MIT 13 4 1 Updated Oct 23, 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 Oct 23, 2026
  • cs-openresty-bouncer Public

    CrowdSec bouncer for OpenResty

    crowdsecurity/cs-openresty-bouncer's past year of commit activity
    Shell 23 MIT 7 9 5 Updated Oct 23, 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 24 Updated Oct 22, 2026
  • crowdsec-local-mcp Public

    An MCP exposing prompts and tools to help users write WAF rules, scenarios etc.

    crowdsecurity/crowdsec-local-mcp's past year of commit activity
    Python 25 MIT 6 2 2 Updated Oct 22, 2026
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