Offline Tenable Nessus Network Monitor Plugin Update in Tenable Security Center

To perform an offline Tenable Nessus Network Monitor plugin update:

If not already in place, install a Tenable Nessus Network Monitor scanner on the same host as Tenable Security Center. It does not need to be started or otherwise configured.
To prevent the Tenable Nessus Network Monitor scanner from starting automatically upon restarting the system, run the following command:

# /sbin/systemctl is-enabled nnm off
Run the following command and save the challenge string that is displayed:

# /opt/nnm/bin/nnm –challenge
Do one of the following:
- If you are using PVS versions 4.2.1 to 5.3.x, in your browser, navigate to https://plugins.nessus.org/v2/offline-pvs.php.
- If you are using Tenable Nessus Network Monitor versions 5.4.x or later, in your browser, navigate to https://plugins.nessus.org/v2/offline-nnm.php.
Paste the challenge string from Step 3 and your Activation Code in the appropriate boxes on the web page.
Click Submit.
On the next page, copy the link that starts with https://plugins.nessus.org/v2/... and bookmark it in your browser. The other information on the page is not relevant for use with Tenable Security Center.
Click the bookmarked link.

The page prompts you to download a file.
Download the file, which is called sc-passive.tar.gz.
Save the sc-passive.tar.gz on the system used to access your Tenable Security Center GUI.

Note: Access the Tenable Nessus Network Monitor feed setting and change the activation from offline to Tenable Security Center.

Log in to Tenable Security Center as an administrator.
Click System > Configuration.

The Configuration page appears.
Click Plugins/Feed.

The Plugins/Feed Configuration page appears.
In the Schedules section, expand the Passive Plugins options.
Click Choose File and browse to the saved sc-passive.tar.gz file.
Click Submit.

After several minutes, the plugin update finishes and the page updates the Last Updated date and time.