linux-hardening

Apply CIS benchmarks to harden Linux servers with SSH and firewall configurations.

46|4|Updated Jan 27, 2026

Search Tags:#security #linux #ssh #firewall #hardening #sysctl #cis benchmarks

Ready to run

npx skills add https://github.com/BagelHole/DevOps-Security-Agent-Skills --skill linux-hardening

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: linux-hardening
Source: https://github.com/BagelHole/DevOps-Security-Agent-Skills/tree/main/security/hardening/linux-hardening
Command: npx skills add https://github.com/BagelHole/DevOps-Security-Agent-Skills --skill linux-hardening

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill addresses the critical need to secure Linux server environments by implementing robust security configurations and hardening measures, reducing vulnerability to attacks.

Core Features & Use Cases

SSH Hardening: Configures SSH for secure remote access, disabling root login and password authentication.
User Security: Enforces strong password policies and audits sudo usage.
Firewall Configuration: Sets up UFW or iptables to restrict network access.
Kernel Hardening: Applies security-focused kernel parameters.
File Permissions: Ensures critical system files have restrictive permissions.
Audit Configuration: Sets up auditd for system event logging.
Use Case: When deploying a new web server, use this skill to ensure it meets baseline security standards before going into production.

Quick Start

Apply the linux-hardening skill to secure the current server's SSH configuration and firewall.

Frequently Asked Questions about linux-hardening

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I harden SSH configuration on a Linux server for production?▼

To harden SSH on a Linux server, you must disable direct root login and password authentication. This skill configures secure SSH access automatically to protect against unauthorized remote entry.

What is the best way to apply CIS benchmarks to a new Linux server deployment?▼

Applying CIS benchmarks involves configuring kernel parameters, user policies, and firewall rules. This skill automates these benchmark implementations to ensure production-ready server security and compliance.

Can I use UFW or iptables to restrict network access when securing Linux?▼

Yes, you can use UFW or iptables to restrict network access on Linux. This skill configures firewall rules using either framework to effectively control inbound and outbound network traffic.

How do I enforce strong password policies and audit sudo usage in Linux?▼

Enforcing strong password policies and auditing sudo usage requires specific user security configurations. This skill manages these policies to ensure baseline security standards are met on your Linux environment.

Does this Linux hardening approach configure auditd for system event logging?▼

Yes, this Linux hardening approach sets up auditd for system event logging. Configuring auditd ensures that critical system events are recorded, addressing the need for robust server security and compliance.