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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 12.8k 583

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 228 206

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

    Crowdsec bouncer written in golang for firewalls

    Go 178 49

Repositories

Showing 10 of 130 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 95 41 15 Updated Mar 22, 2026
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub’s past year of commit activity
    Python 228 MIT 206 106 (4 issues need help) 81 Updated Mar 22, 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 12,838 MIT 583 205 (1 issue needs help) 65 Updated Mar 20, 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 19, 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 19, 2026
  • grokky Public Forked from logrusorgru/grokky

    pure golang grok-like library

    crowdsecurity/grokky’s past year of commit activity
    Go 0 WTFPL 13 0 2 Updated Mar 19, 2026
  • cs-ebpf-bouncer Public
    crowdsecurity/cs-ebpf-bouncer’s past year of commit activity
    Go 0 0 0 1 Updated Mar 16, 2026
  • go-sqllexer Public Forked from DataDog/go-sqllexer

    Simple SQL lexer written in Go

    crowdsecurity/go-sqllexer’s past year of commit activity
    Go 0 MIT 9 1 1 Updated Mar 13, 2026
  • 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 16 MIT 3 7 11 Updated Mar 12, 2026
  • packaging-freebsd Public
    crowdsecurity/packaging-freebsd’s past year of commit activity
    Shell 1 0 0 0 Updated Mar 12, 2026
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