2.4.141-20250331 ISO image:
https://download.securityonion.net/file/securityonion/securityonion-2.4.141-20250331.iso
MD5: CAE347BC0437A93DC8F4089973ED0EA7
SHA1: 3A6F0C2F3B6E3625E06F67EB251372D7E592CB0E
SHA256: D0426D8E55E01A0FBA15AFE0BB7887CCB724C07FE82DA706CD1592E6001CD12B
Signature for ISO image:
https://github.com/Security-Onion-Solutions/securityonion/raw/2.4/main/sigs/securityonion-2.4.141-20250331.iso.sig
Signing key:
https://raw.githubusercontent.com/Security-Onion-Solutions/securityonion/2.4/main/KEYS
For example, here are the steps you can use on most Linux distributions to download and verify our Security Onion ISO image.
Download and import the signing key:
wget https://raw.githubusercontent.com/Security-Onion-Solutions/securityonion/2.4/main/KEYS -O - | gpg --import -
Download the signature file for the ISO:
wget https://github.com/Security-Onion-Solutions/securityonion/raw/2.4/main/sigs/securityonion-2.4.141-20250331.iso.sig
Download the ISO image:
wget https://download.securityonion.net/file/securityonion/securityonion-2.4.141-20250331.iso
Verify the downloaded ISO image using the signature file:
gpg --verify securityonion-2.4.141-20250331.iso.sig securityonion-2.4.141-20250331.iso
The output should show "Good signature" and the Primary key fingerprint should match what's shown below:
gpg: Signature made Fri 28 Mar 2025 06:28:11 PM EDT using RSA key ID FE507013
gpg: Good signature from "Security Onion Solutions, LLC <info@securityonionsolutions.com>"
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: C804 A93D 36BE 0C73 3EA1 9644 7C10 60B7 FE50 7013
If it fails to verify, try downloading again. If it still fails to verify, try downloading from another computer or another network.
Once you've verified the ISO image, you're ready to proceed to our Installation guide:
https://docs.securityonion.net/en/2.4/installation.html