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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 14.8k 713

  2. hub hub Public

    Main repository for crowdsec scenarios/parsers

    Python 253 227

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

    Crowdsec bouncer written in golang for firewalls

    Go 199 59

Repositories

Showing 10 of 132 repositories
  • hub Public

    Main repository for crowdsec scenarios/parsers

    crowdsecurity/hub's past year of commit activity
    Python 253 MIT 227 120 (5 issues need help) 82 Updated Sep 9, 2026
  • hub-dev Public Forked from crowdsecurity/hub

    Hub Dev

    crowdsecurity/hub-dev's past year of commit activity
    Python 0 MIT 231 0 2 Updated Sep 9, 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 52 98 41 16 Updated Sep 9, 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 6 11 9 Updated Sep 9, 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 14,801 MIT 713 224 (1 issue needs help) 76 Updated Sep 9, 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 18 MIT 13 5 12 Updated Sep 9, 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
    18 MIT 23 0 28 Updated Sep 9, 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 5 Updated Sep 7, 2026
  • cs-cloudflare-worker-bouncer-install Public template

    Cloudflare Worker allowing to easily install the Cloudflare worker bouncer

    crowdsecurity/cs-cloudflare-worker-bouncer-install's past year of commit activity
    JavaScript 2 0 1 0 Updated Sep 5, 2026
  • crowdsec-yaml-schemas Public
    crowdsecurity/crowdsec-yaml-schemas's past year of commit activity
    4 1 2 0 Updated Sep 4, 2026
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