Re: DNS Server going to IANA for resolution

From: Kevin D. Goodknecht Sr. [MVP] (admin_at_nospam.WFTX.US)
Date: 02/10/05 

Date: Thu, 10 Feb 2005 09:23:56 -0600

In news:1108046527.270332.255900@c13g2000cwb.googlegroups.com,
Adam Sandler <corn29@excite.com> commented
Then Kevin replied below:
> Hello,
>
> I have a subnet of my LAN (all W2K SP4 boxes); which is
> psueudo-isolated for the developers. This area supports
> a local domain and is not registered in any way. At any
> rate, in that LAN there are 2 DCs and they are both DNS
> servers with an Active Directory integrated zone. The
> remaining 5 boxes in this area all point to these 2 DCSs
> for DNS. If a request outside of this area (e.g., for a
> website) is made, then a forwarder has been specified on
> the DNS servers.
>
> My problem arose when I was looking at the network logs
> the other day. One of the DNS servers is consistently
> banging IANA for DNS resolution. I'm really lost here; I
> don't know why this one box is trying to hit IANA all the
> time. All the external requests should be going to my
> registered DNS server. Any suggestions are appreciated.

Do you have a reverse lookup zone for your local subnet?
While not required for AD functionality, all clients set for DDNS will try
to register A and PTR records in the Authoritative DNS servers. All PTR
records for private IPs are sent to several different Black hole DNS servers
at iana.org, prisoner.iana.org is the SOA master. 

-- 
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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