Solved

My 2008 R2 Domain Controller has no PTR record for itself

Posted on 2013-01-09
3
1,108 Views
Last Modified: 2013-01-14
Hello experts,

Just came across an odd situation where one of my Windows 2008 R2 domain controllers does not have a PTR record in the Reverse Lookup Zone of my Active Directory integrated DNS.  

I noticed this by doing an nslookup from my workstation.  Since my primary DNS is the server I'm referring to above, the nslookup window starts with "Default Server: UNKOWN" and the IP address of the server below it.  

All DNS resolution and network functionality is fine.  I'm not sure if this existed for a while or whether it has to do with the fact that I just did some Windows Updates on just this one DC and rebooted it.  

Will the PTR record come back on its own?  Will I cause any problems by simply doing a "ipconfig /registerdns" command on the box.  The TCP/IP properties on the DNS tab have the "register this connection in DNS" option selected.

Please provide feedback - thanks!  I'd like to correct this the right way (and understand what happened here).
0
Comment
Question by:dpmoney
3 Comments
 
LVL 18

Accepted Solution

by:
Andrew Davis earned 500 total points
ID: 38761529
doing  an Ipconfig /registerdns will cause no issue. It is perfectly safe.

Let us know how you go.

Cheers
Andrew
0
 
LVL 26

Expert Comment

by:Leon Fester
ID: 38762127
"Default Server: UNKOWN" and the IP address of the server below it.  
You typically see this if there is no reverse lookup zone for the subnet your server resides.

DNS registration of DC records should occur under any of the following conditions:
You restart the server(reboot)
You restart the netlogon service
These two options will impact on your server;
reboot - server unavailable.
restart netlogon - no user authentication from that server until the service restarts.

The following commans should not impact your server or clients.
You run ipconfig /registerdns
You run dnscmd /dsregdns

You can also add the record manually if desired.
0
 

Author Closing Comment

by:dpmoney
ID: 38776805
This worked in our simulated lab environment without issue so we plan on putting in production as well.  Thanks for your assistance.
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
schema master 5 26
Powershell out file or export to csv 2 46
Password Complexity 13 28
Domain Controller FSMO 7 36
In this article, we will see the basic design consideration while designing a Multi-tenant web application in a simple manner. Though, many frameworks are available in the market to develop a multi - tenant application, but do they provide data, cod…
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
This tutorial will give a short introduction and overview of Backup Exec 2012 and how to navigate and perform basic functions. Click on the Backup Exec button in the upper left corner. From here, are global settings for the application such as conne…
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question