Server 2008 R2 DHCP Entries with Pen Icon?

November 8, 2010 at 03:35:46
Specs: Windows 7
Hi All,

Working on a small LAN with one DC running DHCP & DNS on Server 2008 R2. I did have a problem with DHCP not clearing old entries in DNS. I would often have multiple machine names for the same IP address. I followed the steps in this article: http://www.eggheadcafe.com/software... DHCP and DNS are now working as expected with DNS entries being removed when DHCP leases are released.

However, now all new entries in DHCP have a Pen icon against them but everything seems to be working as expected? Previsouly when old DNS entries were not being removed all DHCP entries had a clock or timer against them.

Any ideas? Many thanks.


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#1
November 8, 2010 at 09:57:59

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#2
November 9, 2010 at 00:31:09
Hi wanderer,

Thanks for the reply. I dont' have reverse DNS setup so that could be the answer. I've not had a need for reverse DNS so far, so if it's only to resolve this is it a good idea?

Thanks


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#3
November 9, 2010 at 06:02:12
You should set up your reverse DNS or PTR records. If you do an NSLOOKUP for an address without the reverse records, you are probably also getting an error message.

While it may not be absolutely required, it is a good idea and not hard to do. There really isn't a reason not to do it.


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#4
November 9, 2010 at 06:31:15
Thanks for the reply Glen. I may well add reverse DNS in at a later date but with no pressing need I'll leave it as is for now.

Thanks for your responses.


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#5
November 9, 2010 at 06:46:11
Who in their right mind would choose not to setup a server properly?
Where in the world did you get the idea you don't need a reverse lookup zone?

It's like buying three new tires not four. Makes no sense.

How to properly post a question: http://tinyurl.com/2fsqqmu


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#6
November 9, 2010 at 06:59:26
Hi Wanderer,

The server is setup and working with the functionality required. Can you explain the benefit of reverse DNS for internal use on a small lan of 100 clients and I might re-think. Will nslookup tell me anything further than what tracert, DNS and DHCP does as that is the only benefit being mentioned so far.

Thanks


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#7
November 9, 2010 at 08:49:50
What benefit do you have not having a reverse lookup zone?

Presently your dns host entries are "Active lease, DNS dynamic update pending. This address is not available for lease by the DHCP server."

You don't see that as a problem?

It is a problem easily fixed with a reverse lookup zone. You have already spent more time dealing with your dns than I have since setting ours up years ago.

Seems to be the benefits having a reverse lookup outweight not having one.

What were the benefits of not having one again?
Oh ya, all recursive events are handled by Broadcasts. Gee that's good for your network.

How to properly post a question: http://tinyurl.com/2fsqqmu


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