Instructions on how to view the option.
Network Tab -> Network Scan Policies
Either click on a policy or create a new one.
In the policy scan wizard there is a tab called "Discovery Options"
In the section SSH parameters, SSH with KeyFile can be selected for SSH Mode.
(Also see screenshot for confirmation)
Example of a distributed environment:
Server 1 : CCA Server with NDG
Server 2 : NDG
Server 3 : NDG
Server 4 : NDG
If this option is used in a distributed environment then this extra setup is required.
On all NDG servers create the exact path name and copy the .ppk file into it.
For example the CCA Server folder will not exist so must be created.
C:\Program Files\CA\CCA Server\private_key.ppk
The private key must be copied to the CCA Server home directory.
The path must be the same on all servers.