Nessus Offline Activation Jun 2026

(via USB, SCP, etc.) to the offline system.

For systems without direct internet access (air-gapped networks), Nessus cannot activate automatically. You must use the offline activation method, which generates a challenge code on the scanner and then obtains a license file from Tenable’s portal using an internet-connected machine. nessus offline activation

Navigate to the Nessus directory and execute the following command: /opt/nessus/sbin/nessuscli fetch --challenge (via USB, SCP, etc

Copy the alphanumeric string that appears after "Challenge code". Step 2: Obtain Your Activation Code nessus offline activation