sshd tweaking

Hmm okay, Simple question in regards to sshd configs.. I've played with them a bit but not too much before (Not usually much reason to .. at least for me!)

What i'm trying to do is enable root via key (i.e no su needed)
yet keep root via password blocked and require su..

I know this is possible since one of the boxes I have does this already (in fact both from that datacenter) whilst other boxes I have even with almost identical (no difference in strings regarding keys or root) /etc/ssh/sshd_config's won't let me do this.

Another thing I noticed is in both cases the sshd_config's are commented..
e.g:
# Note that some of FreeBSD's defaults differ from OpenBSD's, and
# FreeBSD has a few additional options.

#VersionAddendum FreeBSD-20030924

#Port 22

So is it reading through the comments.. if so then why doesn't the explanation die? There so can't be another config file elsewhere, i've looked _EVERYWHERE_ (there might be?)

I need a dummies guide to sshd I think. Any one care to tell me what I screwed up?

Thanks for your help.

 

 

 

 

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