On Tue, Jan 14, 2003 at 11:50:15PM +0000, Matthew Seaman wrote:
> On Tue, Jan 14, 2003 at 11:23:51PM +0000, Stacey Roberts wrote:
> > Hello,
> >      I'm running bind in a sandbox as per the handbook. I've had this
> > set up and (presumably) working okay since FreeBSD 4.6 Stable, and have
> > today noticed these named entries in /var/log/messages:
> > 
> >  named[143]: denied update from [host_IP].1268 for
> > "1.168.192.in-addr.arpa" IN
> Are you running a DHCP server? On Windows 2K?
> This is a host trying to insert a dynamic PTR record into your DNS.
> That is usually a function of a DHCP server, and can be configured if
> desired.  If you haven't configured dynamic DNS, then it's harmless
> apart from taking up space in your log files.

Windows 2000 will, by default, try this everytime it's assigned an IP.

> W2K is notable for shipping with the dynamic DNS stuff turned on.
> It's not just you: seems a lot of W2K machines try to update records
> in the root servers too... Search for 'Syslog Errors' in
> http://www.caida.org/outreach/presentations/ietf0112/dns.damage.html
> for the depressing statistics.

At my last job, we used to get (and they probably still do) about 2000
of these messages an hour:


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