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Install Nessus Offline

A Nessus Offline registration is suitable for computers that will be running Nessus, but are not connected to the Internet. To ensure that Nessus has the most up-to-date plugins, Nessus servers not connected to the Internet must perform these specific steps to register Nessus.

This process requires the use of two computers: the computer where you are installing Nessus, which is not connected to the Internet, and another computer that is connected to the Internet.

For the instructions below, we'll use computers A (offline Nessus server) and B (online computer) as examples.

  1. During the Configure Nessus, in the Registration drop-down, select Offline.
  2. Once Offline is selected, the page displays a unique Challenge Code. In the example below, the challenge code is: aaaaaa11b2222cc33d44e5f6666a777b8cc99999.

    This challenge code is used in the next step.

  3. (Optional) Configure your Nessus setup to use Custom Settings.

Generate the License

  1. On a system with Internet access (B), navigate to the Nessus Offline Registration Page.

  2. In the top field, enter the challenge code that was displayed on the Nessus Product Registration screen.

    Example Challenge Code: aaaaaa11b2222cc33d44e5f6666a777b8cc99999

  3. Next, where prompted, enter your Nessus activation code.

    Example Activation Code: AB-CDE-1111-F222-3E4D-55E5-CD6F

  4. Select Submit.

    The Offline Update Page Details displays and includes the following elements:

    • Custom URL: The custom URL displayed downloads a compressed plugins file. This file is used by Nessus to obtain plugin information. This URL is specific to your Nessus license and must be saved and used each time plugins need to be updated.
    • License: The complete text-string starting with -----BEGIN Tenable Network Security LICENSE----- and ends with -----END Tenable Network Security LICENSE----- is your Nessus product license information. Tenable uses this text-string to confirm your product license and registration.
    • nessus.license file: At the bottom of the web page, there is an embedded file that includes license text-string displayed.


Download and Copy Latest Plugins

  1. While still using the computer with Internet access (B), select the on-screen, custom URL link.
    The link will download a compressed TAR file.

    Tip: This custom URL is specific to your Nessus license and must be saved and used each time plugins need to be updated.

  2. Copy the compressed TAR file to the Nessus offline (A) system.

    Use the directory specific to your operating system:

    Platform

    Command

    Linux

    # /opt/nessus/sbin/

    FreeBSD

    # /usr/local/nessus/sbin/

    Mac OS X

    # /Library/Nessus/run/sbin/

    Windows

    C:\Program Files\Tenable\Nessus

Copy and Paste License Text

  1. While still using the computer with Internet access (B), copy complete text-string starting with -----BEGIN Tenable Network Security LICENSE----- and ends with -----END Tenable Network Security LICENSE-----
  1. On the computer where you are installing Nessus (A), on the Nessus Product Registration screen, paste the complete text-string starting with -----BEGIN Tenable Network Security LICENSE----- and ends with -----END Tenable Network Security LICENSE-----.
  2. Select Continue.
    Nessus will finish the installation process; this may take several minutes.
  3. Using the System Administrator account you created during setup, Sign In to Nessus.

Copyright © 2017. Tenable Network Security, Inc. All rights reserved. Tenable Network Security, Nessus, SecurityCenter Continuous View, Passive Vulnerability Scanner, and Log Correlation Engine are registered trademarks of Tenable Network Security, Inc. All other products or services are trademarks of their respective owners.