Unapproved updates

From: Fab Siciliano (fsiciliano@optiumcorp.com)
Date: 11/16/01

From: "Fab Siciliano" <fsiciliano@optiumcorp.com>
To: <focus-linux@securityfocus.com>
Subject: Unapproved updates
Date: Thu, 15 Nov 2001 23:02:34 -0500
Message-ID: <000201c16e53$887f2760$50b2143f@chalfont.optiumcorp.com>

Hey everybody,

I just recently started seeing all these unapproved updates hitting my
dns server in /var/log/messages. Is this a security risk? Do I need to
allow updates if it's a secondary dns server? If I don't allow updates,
then there would be no point to direct users to it...right? Because it
wouldn't be caching other hosts' info. Am I right on this or WAY OFF?