Lesson 1 — Mastering Network Defense: A Comprehensive Guide to Setting Up a Secure Linux Server

Introduction

In today’s digital age, the importance of network defense cannot be overstated. With cyber threats on the rise, it’s crucial to have a solid understanding of how to protect and secure your systems. This article aims to provide a step-by-step guide to setting up, configuring, and securing a Linux server, which will serve as the foundation for our network defense strategies. Whether you’re a beginner or an experienced professional, this guide will offer valuable insights and practical steps to enhance your network’s security.

Preparation

Setting Up Your Linux Server

For this course, we’ll be working extensively with the Linux environment. The foundation for our server will be the Ubuntu LTS Server 22.04.1 Release. Here’s how to get started:

• Download the Server ISO: Download the ISO for the latest Ubuntu LTS server 22.04.1 from this link.
• Verify the SHA256 HASH: 10F19C5B2B8D6DB711582E0E27F5116296C34FE4B313BA45F9B201A5007056CB

Hash Verification: On Windows: CertUtil -hashfile ubuntu-22.04.1-live-server-amd64.iso SHA256 On Linux: echo “10F19C5B2B8D6DB711582E0E27F5116296C34FE4B313BA45F9B201A5007056CB…