DNS Problem

April 28, 2009 at 13:37:14
Specs: Windows Server 2003
I posted this in the Windows 2003 forum but think it may be more appropriate here:

Hi, I am having an issue with DNS on our domain controller that I am having some problems resolving.

Here’s the situation, this is on a Windows 2003 server, I just started here and don’t really know what I have on my hands. There is a primary and a secondary domain controller both with DNS, the primary domain controller is also the DHCP server. Let’s say I have a computer with the name “Comp1”, if I go into the forward lookup zone I see "Comp1" with the IP address of, I then go into the reverse lookup zone and see the same computer name with the IP address of If I ping I it resolves to Comp1, but if I ping “comp1.domain.local” it resolves to So the computer appears to have 2 IP address. This is really becoming a problem with our web monitoring because surfcontrol is having an issue with this and reporting a computer going to websites when it really isn’t that computer.

Does anyone have any suggestions for me?

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April 28, 2009 at 13:45:27
are you configured for dhcp to automatically update dns?

if so it would appear there were some manually entered PTR records that should be deleted.

Go thru and verify what is correct and what is not. Delete those that are not which for example would be the ptr record for .180.

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April 28, 2009 at 14:04:43
In DHCP I have the option for "Enable DNS dynamic updates according to the setting below" selected to "Always dynamically update DNS A and PTR records." And the "Discard A and PTR records when lease is deleted." is checked.

I went through and did find a few others that were messed up and deleted the PTR records. Is there any other way that these could get messed up besides the PTR record being manually entered? It just seems kind of odd that some are find and some are not.

Once I delete a PTR record how long does it take for one to be recreated so I can make sure it is correct?

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April 28, 2009 at 14:24:13
Oops, double post.

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