Nessus Offline Activation License Already In Use 2021

Troubleshooting the "Nessus Offline Activation License Already in Use" error can be frustrating, especially when you are working in a secure, air-gapped environment. This specific error typically triggers when the Nessus activation code is already linked to a specific Challenge Code or Host ID in the Tenable system.

To resolve this and successfully activate your offline instance, you must reset the activation code through the Tenable Support Portal or Community. Step 1: Reset the Activation Code

If moving Nessus to new hardware, always run nessuscli fetch --deactivate first. nessus offline activation license already in use

/opt/nessus/sbin/nessuscli fetch --challenge

The "License already in use" error during offline activation typically occurs when Nessus detects that the license key provided has already been used on another system or the current system has been deactivated previously without properly releasing the license. Step 1: Reset the Activation Code If moving

: /opt/nessus/sbin/nessuscli update /path/to/all-2.0.tar.gz Restart the Nessus service:

Once the code is reset, return to your offline machine to generate a new challenge string. : Run /opt/nessus/sbin/nessuscli fetch --challenge . : Run /opt/nessus/sbin/nessuscli fetch --challenge

the reset. The status should update to show the code is now available for a new registration. Retrying Offline Activation

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