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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 12.3k 571

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 221 199

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

    Crowdsec bouncer written in golang for firewalls

    Go 168 50

Repositories

Showing 10 of 124 repositories
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub’s past year of commit activity
    Python 221 MIT 199 102 (4 issues need help) 70 Updated Jan 25, 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 12,319 MIT 571 192 (1 issue needs help) 67 Updated Jan 23, 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 41 94 40 16 Updated Jan 23, 2026
  • packaging-freebsd Public
    crowdsecurity/packaging-freebsd’s past year of commit activity
    Shell 1 0 0 0 Updated Jan 23, 2026
  • paloalto-xsoar-integration-fork Public Forked from demisto/content

    Demisto is now Cortex XSOAR. Automate and orchestrate your Security Operations with Cortex XSOAR's ever-growing Content Repository. Pull Requests are always welcome and highly appreciated!

    crowdsecurity/paloalto-xsoar-integration-fork’s past year of commit activity
    Python 1 MIT 1,905 0 1 Updated Jan 22, 2026
  • cs-blocklist-mirror Public
    crowdsecurity/cs-blocklist-mirror’s past year of commit activity
    Go 22 MIT 7 0 3 Updated Jan 22, 2026
  • ipdex Public
    crowdsecurity/ipdex’s past year of commit activity
    Go 45 MIT 5 4 1 Updated Jan 22, 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 Jan 21, 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 0 MIT 0 0 1 Updated Jan 21, 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 13 MIT 11 6 4 Updated Jan 20, 2026
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