In the announcement post OPNsense 23.7.7 released (https://forum.opnsense.org/index.php?topic=36609.0). It is mentioned
QuoteA hotfix release was issued as 23.7.7_3:
The download mirror https://mirrors.ocf.berkeley.edu/opnsense/
only has OPNsense-23.7-dvd-amd64.iso.bz2 (https://mirrors.ocf.berkeley.edu/opnsense/releases/23.7/OPNsense-23.7-dvd-amd64.iso.bz2) which is from July 2023.
What is the correct way to download the latest OPNSense binaries?
It does have a README:
https://mirrors.ocf.berkeley.edu/opnsense/releases/23.7/README
It says:
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 23.7 (July 31, 2023).
The next scheduled release image for OPNsense is 24.1 (January, 2024).
It is advised to update to the latest version immediately after installation.
Cheers,
Franco