OPNsense images
===============

Welcome! This document describes images types and frequency of image
releases. It is kept up to date. You are reading the latest one.

Our release schedule
====================

We release images only when they are absolutely needed and otherwise stick
to our reliable firmware update process through either the GUI (System:
Settings: Firmware) or the root console (Option 12).

This does not always work, so there may be revoked images and images built
on stable updates, e.g. 18.1.6 as opposed to only 18.1.

The latest stable release image for OPNsense is 26.1 (January 28, 2026).

The next scheduled release image for OPNsense is 26.7 (July, 2026).

It is advised to update to the latest version immediately after installation.

Available image types
=====================

o dvd: ISO installer UEFI hybrid image with live system capabilities
running in VGA mode.
o vga: USB installer UEFI hybrid image with live system capabilities
running in VGA mode.
o serial: USB installer UEFI hybrid image with live system capabilities
running in serial console (115200) mode.
o nano: A preinstalled serial image for USB sticks, SD/CF cards, SSD
with secondary VGA console enabled. These images are 3G in size and
automatically adapt to the installed media size after first boot.

Checksum verification
=====================

Checksum files next to the images may not prove authenticity of images
on any particular mirror. The checksums can also be found in the forum
annoucements, GitHub or blog posts. Please double-check.

https://github.com/opnsense/changelog/tree/master/community
https://forum.opnsense.org/index.php?board=11.0
https://opnsense.org/blog/

Signature verification
======================

All images also have OpenSSL SHA-256 signatures, which can be verified
against the distributed public key. For instructions please visit:

https://docs.opnsense.org/manual/install.html

The public key for version 26.1 is:

-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----

More help needed?
=================

Find our source code and issue trackers: https://github.com/opnsense

Browse the docs: https://docs.opnsense.org/

Visit the forum: https://forum.opnsense.org/

Discuss on Reddit: https://www.reddit.com/r/OPNsense

Or drop us a message: https://bsky.app/profile/opnsense.org


Stay safe,
Your OPNsense team