>> AuthenticationMethods publickey,keyboard-interactive
> I wasn't even aware of that option.
Neither was I.
I had
PreferredAuthentications publickey,keyboard-interactive
in ssh_config ... and thought that that, plus
ChallengeResponseAuthentication yes
in sshd_config was sufficient.
Adding
ChallengeResponseAuthentication yes
KbdInteractiveAuthentication yes
+ AuthenticationMethods publickey,keyboard-interactive
to sshd_config, now, after sshd restart I can no longer ssh in at all.
I simply get
Permission denied (keyboard-interactive).
Once I get in front of the machine, I'll grab an "sshd -ddd" ...
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