OPNsense Installation Guide

1. Download and Prepare Installation Media

First, download the OPNsense ISO image and prepare it on a USB drive:

  • Download: OPNsense-25.1-vga-amd64.img
  • Write the image to a USB drive

2. Start the Installation

After booting from the USB drive, you'll see the installer. Login with:

  • Username: installer
  • Password: opnsense
OPNsense Installer

3. Installation Menu

Select the following options:

Filesystem Selection:

Choose "Install (UFS or ZFS)"

Recommendations:
  • If you don't need snapshots or ZFS features → UFS
  • If you have sufficient RAM (4 GB or more) → ZFS

For simplicity and speed: Select Guided Installation (UFS)

4. Select Disk

Choose the disk where you want to install OPNsense.

5. Installation Process

Wait 1-3 minutes for the installation to complete.

Installation Progress

6. Root Password

Set the root password for both GUI and console access. Enter it twice when prompted.

7. First Boot

After restarting the machine, you'll see the initial setup screen:

First Boot Screen

8. Access the Web Interface

Access the GUI through your web browser using the IP address:

Web Interface Login

9. Dashboard

After configuring and changing the IP address, you'll have access to the dashboard:

OPNsense Dashboard