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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 12.7k 577

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 225 202

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

    Crowdsec bouncer written in golang for firewalls

    Go 174 50

Repositories

Showing 10 of 128 repositories
  • 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 42 99 41 19 Updated Mar 3, 2026
  • 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 12,671 MIT 577 205 (1 issue needs help) 68 Updated Mar 3, 2026
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub’s past year of commit activity
    Python 225 MIT 202 102 (4 issues need help) 80 Updated Mar 3, 2026
  • 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 1 MIT 1 0 1 Updated Mar 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 1 Updated Mar 2, 2026
  • cs-windows-firewall-bouncer Public

    Crowdsec bouncer for the Windows Firewall

    crowdsecurity/cs-windows-firewall-bouncer’s past year of commit activity
    C# 31 MIT 5 5 3 Updated Mar 2, 2026
  • cs-aws-waf-bouncer Public

    Crowdsec bouncer for AWS WAF

    crowdsecurity/cs-aws-waf-bouncer’s past year of commit activity
    Go 9 MIT 5 11 5 Updated Mar 2, 2026
  • helm-charts Public

    CrowdSec community kubernetes helm charts

    crowdsecurity/helm-charts’s past year of commit activity
    Shell 43 MIT 55 30 (1 issue needs help) 11 Updated Mar 2, 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
    16 MIT 22 0 3 Updated Feb 27, 2026
  • cs-log-replay-gui Public
    crowdsecurity/cs-log-replay-gui’s past year of commit activity
    TypeScript 0 MIT 0 0 0 Updated Feb 27, 2026
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