I have an automated remote script that connects to a set of known servers. I never want be prompted to add a new host key if the server is missing from .ssh/known_hosts. If the key is missing, the client should just immediately exit.
Dropbear seems to give me the option of relaxing the host key checks (-y -y). Is there an option to make them more strict? M p.s. OpenSSH client option "StrictHostKeyChecking yes" is basically what I am looking for.