16.04.7.3 ISO image:
https://download.securityonion.net/file/Security-Onion-16/securityonion-16.04.7.3.iso
Signature for ISO image:
https://github.com/Security-Onion-Solutions/security-onion/raw/master/sigs/securityonion-16.04.7.3.iso.sig
Signing key:
https://raw.githubusercontent.com/Security-Onion-Solutions/security-onion/master/KEYS
For example, here are the steps you can use on most Linux distributions to download and verify our Security Onion ISO image.
Download the signing key:
wget https://raw.githubusercontent.com/Security-Onion-Solutions/security-onion/master/KEYS
Import the signing key:
gpg --import KEYS
Download the signature file for the ISO:
wget https://github.com/Security-Onion-Solutions/security-onion/raw/master/sigs/securityonion-16.04.7.3.iso.sig
Download the ISO image:
wget https://download.securityonion.net/file/Security-Onion-16/securityonion-16.04.7.3.iso
Verify the downloaded ISO image using the signature file:
gpg --verify securityonion-16.04.7.3.iso.sig securityonion-16.04.7.3.iso
The output should show "Good signature" and the Primary key fingerprint should match what's shown below:
gpg: Signature made Thu 04 Mar 2021 03:48:50 PM EST using RSA key ID ED6CF680
gpg: Good signature from "Doug Burks <[email protected]>"
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: BD56 2813 E345 A068 5FBB 91D3 788F 62F8 ED6C F680
Once you've verified the ISO image, you're ready to proceed to our Installation guide:
https://docs.securityonion.net/en/16.04/installation.html