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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

    CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

    Go 11.6k 548

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 215 191

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

    Crowdsec bouncer written in golang for firewalls

    Go 156 49

Repositories

Showing 10 of 121 repositories
  • helm-charts Public

    CrowdSec community kubernetes helm charts

    crowdsecurity/helm-charts’s past year of commit activity
    Shell 38 MIT 49 28 (1 issue needs help) 16 Updated Nov 21, 2025
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub’s past year of commit activity
    Python 215 MIT 191 99 (3 issues need help) 59 Updated Nov 21, 2025
  • 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 38 90 43 17 Updated Nov 21, 2025
  • 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.

    crowdsecurity/crowdsec’s past year of commit activity
    Go 11,630 MIT 548 180 (1 issue needs help) 65 Updated Nov 21, 2025
  • cs-haproxy-spoa-bouncer Public

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

    crowdsecurity/cs-haproxy-spoa-bouncer’s past year of commit activity
    Go 11 MIT 3 10 8 Updated Nov 21, 2025
  • 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 6 MIT 1 2 0 Updated Nov 19, 2025
  • crowdsec-service-api-sdk-python Public

    Service API Python SDK

    crowdsecurity/crowdsec-service-api-sdk-python’s past year of commit activity
    Python 1 MIT 0 0 1 Updated Nov 17, 2025
  • cs-windows-firewall-bouncer Public

    Crowdsec bouncer for the Windows Firewall

    crowdsecurity/cs-windows-firewall-bouncer’s past year of commit activity
    C# 27 MIT 4 4 4 Updated Nov 17, 2025
  • crowdsec-splunk-app Public
    crowdsecurity/crowdsec-splunk-app’s past year of commit activity
    Python 0 MIT 3 0 0 Updated Nov 17, 2025
  • sec-lists Public

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

    crowdsecurity/sec-lists’s past year of commit activity
    15 MIT 22 0 2 Updated Nov 14, 2025
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