Open Cyber Defense Infrastructure
Security International Group builds open-source tooling for automated Linux hardening, continuous security monitoring, and compliance reporting, designed for Debian-based systems and federal environments.
HARDN is a public demo of the full HARDN-XDR enterprise solution. It showcases core hardening features. Contact SIG for production HARDN-XDR access.
Core Platform
WhatHARDNdoes
HARDN provides automated security hardening and continuous monitoring for Debian-based Linux systems through an integrated toolkit, one command launches the service manager, SIEM dashboard, and all hardening modules.
Automated System Hardening
One-command security configuration for Debian and Ubuntu. Applies comprehensive hardening controls automatically.
LEGION Daemon
Continuous real-time security monitoring. Tracks system changes and potential threats around the clock.
Service Manager
Interactive CLI service manager for orchestrating hardening runs, launching modules, and reviewing security tooling.
Integrated SIEM
GTK4 native dashboard for real-time monitoring of security status, compliance events, and service health.
Container Hardening
CIS Docker Benchmark enforcement for rootless containers, non-root users, and read-only filesystems.
Compliance Reporting
Built-in compliance meter aligned to CIS standards. Generates reports for administrator review and audit evidence.
Services
Two system services.
Always running.
HARDN installs two persistent systemd services that apply hardening configurations and monitor your system continuously, no manual intervention required.
hardn.serviceSecurity hardening service that applies security configurations when triggered. Manages all hardening modules and compliance controls.
legion-daemon.serviceContinuous security monitoring daemon. Watches for threats, configuration drift, and system changes in real time.
Quick Start
Solutions
Builtforeverycompliancemandate
Whether you are pursuing an ATO, meeting DoD STIG requirements, or hardening your CI/CD pipeline, SIG tooling covers the full compliance lifecycle.
Explore All SolutionsNeed the full HARDN-XDR solution?
The public HARDN repository is a demonstration of HARDN-XDR core features. The full enterprise solution includes advanced compliance automation, extended detection capabilities, and dedicated support. Contact SIG to discuss production deployment.