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linux-security-hardener

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Automated Linux server hardening plan.

Software Engineering#security#linux#ssh#firewall#server-hardening#auditd
Authorchfle
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Linux servers often remain misconfigured and exposed, requiring manual hardening steps that are error-prone and time-consuming. This Skill generates a complete, prioritized hardening plan with ready-to-apply configs and scripts to reduce attack surface and meet benchmarks.

Core Features & Use Cases

  • System updates and unattended upgrades
  • SSH hardening, firewall, and fail2ban configuration
  • Kernel sysctl hardening, safe defaults, and auditd rules
  • A master hardening script (harden.sh) and drop-in configs to apply changes
  • Use cases include onboarding a fresh VPS, hardening an existing server, or preparing a Docker host or web server for production.

Quick Start

Run the master hardening script as root to apply the complete Linux server hardening plan.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: linux-security-hardener
Download link: https://github.com/chfle/lehnert-claude-skills/archive/main.zip#linux-security-hardener

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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