Nessus Offline Activation License Already In Use Full Better [Top-Rated · 2024]

This error typically occurs when you attempt to activate a Nessus scanner offline (using a .challenge file and a license file from Tenable), but the system refuses to complete the activation. The message indicates that your license key—whether a Nessus Professional (unlimited) or Nessus Expert (unlimited) trial or paid license—has either been (no more activations left) or is already active on another scanner instance using the same unique machine ID.

paths for a particular operating system like macOS or a specific Linux distribution? Update License Offline (Tenable Nessus 10.11)

Error: The license key provided is already in use or has reached its maximum number of activations. Activation failed. Please contact Tenable support.

Apply the newly generated license file to your offline scanner via the command-line interface. nessus offline activation license already in use full

Navigate to the and log in with your registered account. Click on My Products or Licenses .

Below is a comprehensive guide to understanding why this happens and exactly how to resolve it so you can get your vulnerability scanner back online. Why This Error Occurs

Copy the custom URL provided on this webpage to download the latest offline plugins archive ( all-2.0.tar.gz ). You will need this to update your scanner. Step 4: Apply the License to the Offline Scanner This error typically occurs when you attempt to

This tells Tenable to release the activation slot immediately.

Find the specific activation code causing the issue and click .

Run the Nessus CLI command to generate a new challenge code. /opt/nessus/sbin/nessuscli fetch --challenge Use code with caution. For Windows (Run CMD as Administrator): Update License Offline (Tenable Nessus 10

After deactivating old scanners, your license may still show as "full" due to a stuck activation. Request a license reset from Tenable:

Confirm the reset. The status of your activation code should now change to "Available" or "Unused." Step 2: Generate a New Challenge Code

: On the offline machine, apply the license using:

The license is bound to the specific challenge code of the machine. Moving the VM or changing hardware will trigger the "already in use" error again.

If running Nessus inside Docker, ensure that the /opt/nessus directory is mapped to a persistent external volume. If you do not persist this data, restarting or upgrading the container will generate a brand-new hardware profile and trigger the "License already in use" error on the next boot.