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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

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  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 15.5k 758

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 266 251

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

    Crowdsec bouncer written in golang for firewalls

    Go 207 66

Repositories

Showing 10 of 132 repositories
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub's past year of commit activity
    Python 266 MIT 251 131 (6 issues need help) 47 Updated Nov 6, 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 53 105 41 12 Updated Nov 6, 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
    JavaScript 18 MIT 26 0 17 Updated Nov 6, 2026
  • helm-charts Public

    CrowdSec community kubernetes helm charts

    crowdsecurity/helm-charts's past year of commit activity
    Shell 63 MIT 72 40 (1 issue needs help) 14 Updated Nov 5, 2026
  • home-assistant-addons Public

    Home Assistant Crowdsec Addons

    crowdsecurity/home-assistant-addons's past year of commit activity
    Dockerfile 98 MIT 20 13 6 Updated Nov 5, 2026
  • cs-openresty-bouncer Public

    CrowdSec bouncer for OpenResty

    crowdsecurity/cs-openresty-bouncer's past year of commit activity
    Shell 23 MIT 8 9 2 Updated Nov 5, 2026
  • hub-dev Public Forked from crowdsecurity/hub

    Hub Dev

    crowdsecurity/hub-dev's past year of commit activity
    Python 0 MIT 256 0 0 Updated Nov 4, 2026
  • go-cs-bouncer Public

    Go library to use crowdsec API.

    crowdsecurity/go-cs-bouncer's past year of commit activity
    Go 16 MIT 14 2 3 Updated Nov 4, 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 15,484 MIT 758 230 (1 issue needs help) 77 Updated Nov 4, 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 4 0 2 1 Updated Nov 3, 2026
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