Nessus Offline Mode To Online Mode -

/opt/nessus/sbin/nessuscli fetch --register <online-activation-code> If you have a now, you cannot directly convert it — you need a standard online activation code from your Tenable account. 4. If registration fails because it’s already offline‑registered First reset the registration:

To switch Nessus from to Online Mode , you generally need to re‑register the scanner with a valid activation code while connected to the internet. Offline mode is typically used for air‑gapped networks where the scanner cannot reach Tenable’s cloud or license servers. nessus offline mode to online mode

Here’s the standard process: Run this command on the Nessus host: /opt/nessus/sbin/nessuscli fetch --register &lt

/opt/nessus/sbin/nessuscli fetch --deregister Then re‑register with an online code. sudo systemctl restart nessusd (or service nessusd restart ) 6. Verify online mode nessus-cli status You should see: If you have a now