Re: Dynamic Update of A&PTR Records - Best Practice?

Richard Tubb <richard@xxxxxxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> I'm looking for some advice on the pros/cons of turning on the option
> within the DHCP Server that says "Always Dynamically Update A & PTR
> Records".
>
> We run a Windows 2003 AD network with a DC running DHCP and DNS. On
> the workstation we have Windows XP Professional.
>
> I understand that Windows XP clients, by default, automatically
> update their DNS A record when renewing IP address allocations from
> DHCP, but not PTR records.
>
> Is there any reason why you would not turn on this option, so that PTR
> records are kept upto date without manual intervention?
>
> I'm interested to understand the reasoning behind turning on/off this
> option - whether it's a case of needing it when you use legacy
> clients that don't automatically update records in DNS, or some other
> valid reason. Thanks for any assistance offered!

If you have this option turned on the DHCP server will become the owner of
the record in DNS. So it becomes important how the DHCP server authenticates
with the DNS server. In my personal experience with this setting is that it
helps keep the reverse lookup zone clean of old PTR records left behind by
machines that do not remove them becaue the machine was suddenly
disconnected from the network.



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