We are trying to configure by DEVICE CONFIG Utility the private key and the certificate
on our CR6 data logger, to initialize a secure SFTP data transfer. We have some problem
in identifying the correct file format and extension required by the system. Can you
suggest us how to proceed? Thank you for your help, Francesco
In the current operating system SFTP only works with password authentication. SFTP Public Keys and Private keys are not fully implemented. In the soon to be released CR6 os Version 11.00 Public Keys and Private keys will be supported when using the. PEM format. Along with a CR6 OS update it is also important to make sure you are running the latest version of Device Configuration Utility.
Just FYI, it doesn't appear to support 4096 bit keys, so you'd need to use 2048 or lower, so something like the following generated keys that we could upload to our CR6 (v11/latest DCU):
ssh-keygen -t rsa -b 2048 -f key -C "Key Comment"