Skip to content
@crowdsecurity

crowdsec

README.md

CrowdSec

CrowdSec Website • Linkedin Badge Reddit Badge YouTube Badge • CrowdSec Console

Join the CrowdSec Community on Discord

Contribute to CrowdSec open source projects

🌟 Give a Gitstar 🌟

Github Badge

<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 15.4k 756

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 265 248

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

    Crowdsec bouncer written in golang for firewalls

    Go 205 66

Repositories

Showing 10 of 132 repositories
  • 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 25 0 14 Updated Nov 3, 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 11 Updated Nov 3, 2026
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub's past year of commit activity
    Python 265 MIT 249 129 (7 issues need help) 51 Updated Nov 2, 2026
  • pfSense-pkg-crowdsec Public
    crowdsecurity/pfSense-pkg-crowdsec's past year of commit activity
    PHP 76 7 30 2 Updated Nov 2, 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 15,437 MIT 756 229 (1 issue needs help) 74 Updated Nov 2, 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 31 Updated Nov 2, 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 Nov 2, 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 Nov 2, 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 2, 2026
  • packaging-freebsd Public
    crowdsecurity/packaging-freebsd's past year of commit activity
    Shell 1 0 0 1 Updated Oct 30, 2026
View all repositories

Sponsoring

  • @antonmedv
GitHub Sponsor