vps-hardening

Harden Debian or Ubuntu VPS servers with SSH, firewall, and system configurations.

15|Updated May 12, 2026

Search Tags:#security #ssh #firewall #hardening #vps #ubuntu #debian

Ready to run

npx skills add https://github.com/GoldenWing-360/claude-security-skills --skill vps-hardening-goldenwing-360

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: vps-hardening
Source: https://github.com/GoldenWing-360/claude-security-skills/tree/main/vps-hardening
Command: npx skills add https://github.com/GoldenWing-360/claude-security-skills --skill vps-hardening-goldenwing-360

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a practical, step-by-step guide to harden a Debian or Ubuntu VPS, reducing security vulnerabilities and protecting against threats.

Core Features & Use Cases

Basic Server Security: Configures SSH access, firewall, fail2ban, and automatic updates to prevent unauthorized access.
System Hardening: Implements kernel parameters and log management to enhance system resilience.
Use Case: Ideal for new server deployment, inheritance scenarios, or pre-exposure preparations to the internet to ensure a robust baseline security posture.

Quick Start

Follow the instructions to update your system, create a non-root user, and enable basic security protections for your VPS.

Frequently Asked Questions about vps-hardening

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

FAQPage Schema

How do I secure a new Ubuntu or Debian VPS before exposing it to the internet?▼

To secure a new Ubuntu or Debian VPS, you must configure SSH access, set up a firewall, install fail2ban, and enable automatic updates. This hardening process prevents unauthorized access and establishes a robust baseline security posture.

What steps are required to harden SSH configuration and prevent unauthorized access on a VPS?▼

Hardening SSH configuration on a VPS involves detailed command sequences to modify access settings, typically creating a non-root user and disabling insecure login methods. These best practices prevent unauthorized access and protect against external threats.

Does this VPS hardening guide work for both fresh provisioning and inherited server scenarios?▼

Yes, this VPS hardening guide is applicable for fresh server provisioning, inheritance scenarios, and pre-deployment security reinforcement. It provides comprehensive steps to ensure a robust baseline security posture for Debian or Ubuntu systems.

What is the best way to configure a firewall and fail2ban on a Debian VPS?▼

The best way to configure a firewall and fail2ban on a Debian VPS is by following detailed command sequences and best practices for basic server security. This setup blocks malicious traffic and prevents unauthorized access effectively.

Can I implement system hardening and kernel parameters on an Ubuntu server in under 30 minutes?▼

Yes, you can implement system hardening, including kernel parameters and log management, on an Ubuntu server in just 30 minutes. This quick start process enhances system resilience and reduces vulnerabilities rapidly.

Why do I need to create a non-root user when setting up VPS security?▼

Creating a non-root user is essential for VPS security because it limits privileged access and prevents unauthorized root logins. Configuring SSH access with a non-root user reduces vulnerabilities and protects against threats.