How to Install Security Onion: A Step-by-Step Guide

Introduction to Security Onion

Security Onion is a comprehensive, Linux-based solution for monitoring network security, providing intrusion detection, and managing logs. It integrates various open-source tools to offer a centralized security platform. In this guide, we will walk through the installation process.

Prerequisites

A 64-bit system with at least 8GB RAM and 200GB of hard disk space.
Access to the internet for downloading installation files.
A basic understanding of Linux command line operations.

Step 1: Download Security Onion

Start by downloading the latest Security Onion ISO from the Official site. Ensure that your download is verified using checksums provided on the website.

Step 2: Prepare the Installation Environment

Burn the downloaded ISO file to a USB stick or DVD using Rufus (Official site) for Windows or Etcher (Official site) for Linux.

Step 3: Boot From Installation Media

Insert the USB stick or DVD into the target system and reboot. Make sure to select the boot device in BIOS/UEFI to boot from your USB/DVD.

Step 4: Install Security Onion

Upon booting, you’ll be welcomed by the installation wizard. Follow the prompts:

Select ‘Install Security Onion’ from the menu.
Choose your language preferences and time zone.
Set up the keyboard layout.
Choose an installation drive and partition the disk as needed.

After confirming these settings, the installation will begin. It might take several minutes.

Step 5: Initial Configuration

Once installed, restart the system and remove the installation media. Upon reboot, follow on-screen instructions to set up the initial configuration, including network settings and security parameters.