sshd - public key vs keyboard interactive authentication

[Jeff With]

> 
> So, my questions:
> 
> 1. How do I disable password authentication - i.e. force to use the DSA keys?

Make sure all 'password' auth is disabled and publickey is enabled.  

<sshd_config>

PasswordAuthentication no
UseLogin no
UsePAM no 
PubkeyAuthentication yes

> 
> 2. Can I use both for added security - i.e.  using the keys and then
> get prompted for password?

There was some work stared on this type of thing last year, but I
don't think it was every finalized...

http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=108552250117169&w=2

- jw