Changes to the network adapter, MAC address, or hostname can make Nessus see the same machine as a “new” one.
Once the code is reset, follow these steps on your offline machine: nessus offline activation license already in use
I can then provide specific command syntaxes or alternative troubleshooting steps tailored to your environment. Share public link Changes to the network adapter, MAC address, or
Your physical server’s network card died. You replaced the NIC or moved the hard drive to entirely new hardware. The Challenge Code (based on the old NIC) is no longer valid, but Tenable’s servers still show that your license key is tied to that dead hardware’s Challenge Code. Changes to the network adapter
"C:\Program Files\Tenable\Nessus\nessuscli.exe" fetch --challenge Use code with caution. Open a terminal and run: /Library/Nessus/run/sbin/nessuscli fetch --challenge Use code with caution.