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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 11.9k 556

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 219 193

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

    Crowdsec bouncer written in golang for firewalls

    Go 159 49

Repositories

Showing 10 of 123 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
    16 MIT 22 0 8 Updated Dec 16, 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 11,851 MIT 556 187 (1 issue needs help) 71 Updated Dec 15, 2025
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub’s past year of commit activity
    Python 219 MIT 193 98 (4 issues need help) 62 Updated Dec 15, 2025
  • 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 1 Updated Dec 15, 2025
  • crowdsec-tracker-api-sdk-python Public

    Live Exploit Tracker API Python SDK

    crowdsecurity/crowdsec-tracker-api-sdk-python’s past year of commit activity
    Python 0 MIT 0 0 1 Updated Dec 15, 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 40 89 43 16 Updated Dec 15, 2025
  • cs-windows-firewall-bouncer Public

    Crowdsec bouncer for the Windows Firewall

    crowdsecurity/cs-windows-firewall-bouncer’s past year of commit activity
    C# 28 MIT 4 4 3 Updated Dec 15, 2025
  • home-assistant-addons Public

    Home Assistant Crowdsec Addons

    crowdsecurity/home-assistant-addons’s past year of commit activity
    Dockerfile 86 MIT 15 10 0 Updated Dec 13, 2025
  • crowdsec-splunk-app Public
    crowdsecurity/crowdsec-splunk-app’s past year of commit activity
    Python 0 MIT 3 1 1 Updated Dec 12, 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 11 15 Updated Dec 12, 2025
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