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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 15.2k 750

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 262 242

  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-dev Public Forked from crowdsecurity/hub

    Hub Dev

    crowdsecurity/hub-dev's past year of commit activity
    Python 0 MIT 246 0 0 Updated Oct 22, 2026
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub's past year of commit activity
    Python 262 MIT 242 128 (7 issues need help) 54 Updated Oct 22, 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 31 Updated Oct 22, 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 22, 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 15,249 MIT 750 227 (1 issue needs help) 68 Updated Oct 21, 2026
  • cs-nginx-bouncer Public

    CrowdSec bouncer for Nginx

    crowdsecurity/cs-nginx-bouncer's past year of commit activity
    Shell 67 MIT 14 13 3 Updated Oct 21, 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 10 7 Updated Oct 21, 2026
  • cs-cloudflare-worker-bouncer Public

    A CrowdSec Bouncer that syncs the decisions made by CrowdSec with CloudFlare's firewall using cloudflare workers. Manages multi user, multi account, multi zone setup. Supports IP, Country and AS scoped decisions.

    crowdsecurity/cs-cloudflare-worker-bouncer's past year of commit activity
    Go 22 MIT 15 7 13 Updated Oct 21, 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 Oct 20, 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 22 Updated Oct 19, 2026
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