Reactivate Tenable Nessus

Required user role when using Tenable Nessus Manager: Administrator or System Administrator

When your Tenable Nessus license expires, you must register a new or renewed activation code to continue using Tenable Nessus. See the Obtain an activation code page for instructions on how to obtain and use an activation code.

Note: If you are working with Tenable Nessus offline, see Update License Offline.

User Interface

  1. In Tenable Nessus, in the top navigation bar, click Settings.
  2. In the Overview tab, click next to the activation code.

  3. Type the new activation code and click Activate.

    Tenable Nessus downloads and installs the Tenable Nessus engine and the latest plugins, and then restarts.

Command Line Interface

  1. On the system running Tenable Nessus, open a command prompt.

  2. Run the nessuscli fetch --register <activation code> command specific to your operating system.

    Platform Command

    Linux

    # /opt/nessus/sbin/nessuscli fetch --register xxxx-xxxx-xxxx-xxxx

    Windows

    C:\Program Files\Tenable\Nessus\nessuscli.exe fetch --register xxxx-xxxx-xxxx-xxxx

    macOS

    # /Library/Nessus/run/sbin/nessuscli fetch --register xxxx-xxxx-xxxx-xxxx

    Note: To register Tenable Nessus without automatically downloading and installing the latest updates, use the command nessuscli fetch --register-only.