able to login as root via ssh :-(

[Don Russell]

FC5
openssh-4.3p2-4

I was surprised to find that I can log in as root via ssh from my 
Windows machine to my FC5 box.

I've always used ssh to log in as a user then 'su -' ....

I don't see anything in /etc/ssh/sshd_config to prevent that, or enable 
it for that matter?

What do I need to change so root can't be logged in via ssh? Or is it 
letting me because it recognizes a key?

Thanks,
Don