Iam planning to connect live sftp server to mendix application. I want to fill these host key  and where can i get that host key

Did you try filling in the hostname and port and then clicking “obtain host key”?

what value we have to pass in host key finger

what value we have to pass in host key finger print

leaving empty is not working

Ok, what does “not working” mean?

Do you get an error?

Do the logs show anything?