ssh and root logins

[Dale E Martin <dmartin@cliftonlabs.com>]

I've noticed a fair number of attempted root logins on my various boxes
over the last few weeks.  I don't know if there is a new ssh vulnerability
(that thus far appears to be ineffective with my config) or if they are
attempting one of the old ones...

Anyways, I would like to disable password logins for root on several of my
boxes but allow root to come in from known IPs and with known ssh keys.  Is
there a way to disable password logins for root in sshd_config or
root/.ssh/config, while leaving password logins intact for regular users?

Thanks!
	Dale
-- 
Dale E. Martin, Clifton Labs, Inc.
Senior Computer Engineer
dmartin@cliftonlabs.com
http://www.cliftonlabs.com
pgp key available