petitboot: Issue with ssh / telnet

[Andrea]

According to the login prompt of petitboot when I connect via telnet
if I set up a password using passwd, then the telnet access is switched off
and I can only access via ssh.

This is true until I reboot, and then the ssh login does not work
(I guess because the password has not been stored) and I can still logon via telnet.

As a side question, I have a small practical problem using ssh.
Basically the OS (i.e. Fedora) & petitboot both provide a ssh access.
My ssh client (on a laptop) complains that the public key of the same IP
changes between petitboot and Fedora and this could be a potential security risk.

It even goes by preventing all connections until I have removed the relevant line from .ssh/.kwon_hosts.

Any idea how to "improve" that?