From owner-freebsd-security@FreeBSD.ORG  Mon Oct  3 13:51:07 2005
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Date: Mon, 3 Oct 2005 09:51:00 -0400
From: Bob Johnson <fbsdlists@gmail.com>
To: mario <mario-dated-1128750963.989ae6@schmut.com>
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Cc: freebsd-security@freebsd.org, jrhall@gmail.com
Subject: Re: Repeated attacks via SSH
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On 10/3/05, mario <mario@schmut.com> wrote:
> So, Jared Hall wrote:
> > Is there a way to block root login over 22?
> > Jared
> > ______________________
>
> yep
>
> [root@snoopy ~]#grep Root /etc/ssh/sshd_config
> PermitRootLogin no

This is not sufficient if ssh is using PAM for authentication (because
PAM will allow root logins).  Make sure you also have disabled PAM
authentication with

ChallengeResponseAuthentication    no

I think both of these settings default to "no" these days, but you
might want to check your config to be sure.

- Bob