If Nessus is already installed, run the following command to retrieve the challenge string: Linux: /opt/nessus/sbin/nessuscli fetch --challenge
The search term has been trending heavily across InfoSec forums (Reddit r/netsec, Stack Overflow, and Tenable Community) because it solves a critical pain point: How do you activate Nessus when the scanner has zero internet access? nessus offline registration hot
: On the offline scanner (Computer A), you must obtain a unique challenge code. This can be done via the Nessus web interface by selecting "Register Offline" during setup, or through the command line using the command nessuscli fetch --challenge Obtain Activation Code If Nessus is already installed, run the following
: C:\Program Files\Tenable\Nessus\nessuscli.exe fetch --challenge . Linux : /opt/nessus/sbin/nessuscli fetch --challenge . If Nessus is already installed