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Date: Mon, 05 Apr 2010 01:25:09 +0200
From: Erik Norgaard <norgaard@locolomo.org>
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Subject: Re: SSH root login with keys only
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On 04/04/10 23:04, Marcin Wisnicki wrote:
> Is it possible to configure sshd such that both conditions are met:
>
> 1. Root will be able to login only by using keys
> 2. Normal users will still be able to use pam/keyboard-interactive

Yes, you can create a Match block with the criteria User, something like 
this I guess will work (haven't tested):

PermitRootLogin yes
Match User root
     PasswordAuthentication no

check the man page. You might also want to restrict from where root can 
login with another match block.

I assume that you have decided root login is acceptable with the 
increased security of key authentication. Just beware that the key must 
be password protected.

BR, Erik
-- 
Erik Nørgaard
Ph: +34.666334818/+34.915211157                  http://www.locolomo.org