Generate Challenge Code

Before performing offline update operations, you may need to generate a unique identifier on the Nessus server. Tenable calls this identifier a challenge code.

Whereas you use an activation code when performing Nessus operations while connected to the internet, you use a license when performing offline operations; the generated challenge code enables you to view and use your license for offline operations.

To generate a challenge code in Nessus:

1. Log in to Nessus.

2. Click Settings.

3. Click the pencil icon next to the activation code.

   The Update Activation Code window appears.

4. In the Registration drop-down menu, select Offline.

5. Click Activate.

   The challenge code appears in the window.

To generate a challenge code from the command line:

1. On the offline system running Nessus (A), open a command prompt.
2. Use the nessuscli fetch --challenge command specific to your operating system.
   

   Platform	Command
   Linux	# /opt/nessus/sbin/nessuscli fetch --challenge
   FreeBSD	# /usr/local/nessus/sbin/nessuscli fetch --challenge
   Mac OS X	# /Library/Nessus/run/sbin/nessuscli fetch --challenge
   Windows	C:\Program Files\Tenable\Nessus>nessuscli.exe fetch --challenge

3. Copy the alphanumeric challenge code.
   Example Challenge Code:
   aaaaaa11b2222cc33d44e5f6666a777b8cc99999
4. Use the copied challenge code to Generate Your License.