Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Child Domain and dns suffixes

Posted on 2016-11-18
9
Medium Priority
?
163 Views
Last Modified: 2016-12-01
So I have a child domain and I can not ping a machine from the the parent domain with out putting in the FQDN.

and nslookup will not work unless I do the same.

So I'm thinking a DNS issue.  if I add the child domain name in the network properties of my machine I can ping and nslookup

when I run dcdiag /e /test:dns from parent domain controller I get this

at the bottome
-dns.png
0
Comment
Question by:Michael Chonlahan
  • 4
  • 3
  • 2
9 Comments
 
LVL 41

Assisted Solution

by:footech
footech earned 1000 total points
ID: 41893879
You will have to specify which DNS suffixes should be tried.  You can specify this manually in the NIC properties of a computer, but if you need to set for multiple machines it's best to use Group Policy (under Computer > Administrative Templates > Network > DNS Client > DNS Suffix Search List).
0
 

Author Comment

by:Michael Chonlahan
ID: 41893890
Ok is there a reason why it is not automatically doing that?  on the child it automatily put that if I did a ipconfig /all it shows both but on the parent I have to put it on the nic card properties.
0
 
LVL 27

Accepted Solution

by:
DrDave242 earned 1000 total points
ID: 41901800
Ok is there a reason why it is not automatically doing that?  on the child it automatily put that if I did a ipconfig /all it shows both but on the parent I have to put it on the nic card properties.

I'm fairly certain that this is normal behavior. A member of a child domain will (by default) add the child domain's DNS suffix and any parent domain suffixes to its search list (known as DNS devolution), but this doesn't happen automatically the other way around. If you think about it, the FQDN is required to uniquely identify the machine you're trying to reach. There's no way for the OS to know if the hostname "server1" should refer to server1.parent.com, server1.child.parent.com, or something else.

As footech mentioned, Group Policy is the best way to add the child domain suffix to multiple machines.
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 

Author Comment

by:Michael Chonlahan
ID: 41901801
Ok thank you I will work on setting up a group policy to add it.

Thank you all for the help
0
 
LVL 41

Assisted Solution

by:footech
footech earned 1000 total points
ID: 41903493
Thanks, DrDave242, for jumping in.  Somehow this had slipped past me.
0
 
LVL 41

Assisted Solution

by:footech
footech earned 1000 total points
ID: 41909199
I'm not going to object, but it would have been more appropriate to split points, as both DrDave242 and I answered some of your questions.
0
 

Author Comment

by:Michael Chonlahan
ID: 41909201
sorry did know I could do that new to this site.
0
 
LVL 27

Assisted Solution

by:DrDave242
DrDave242 earned 1000 total points
ID: 41909223
Footech's right; the points should be split. There's a way to do that after a question has been closed, as I've seen it done before, but I honestly don't know how to do it. Submit an attention request, maybe?
0
 
LVL 41

Assisted Solution

by:footech
footech earned 1000 total points
ID: 41909256
Yes, but I'm not going to ask anyone to do that.  Just keep it in mind for the next time.
0

Featured Post

Lessons on Wi-Fi & Recommendations on KRACK

Simplicity and security can be a difficult  balance for any business to tackle. Join us on December 6th for a look at your company's biggest security gap. We will also address the most recent attack, "KRACK" and provide recommendations on how to secure your Wi-Fi network today!

Question has a verified solution.

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

There have been a lot of times when we have seen the need to enter a large number of DNS entries in a forward lookup zone. The standard procedure would be to launch the DNS Manager console, create the Zone and start adding new hosts using the New…
I've written instructions for one router type, but this principle may be useful for others of the same brand and even other brands of router. Problem: I had an issue especially with mobile devices that refused to use DNS information supplied via…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…
Is your data getting by on basic protection measures? In today’s climate of debilitating malware and ransomware—like WannaCry—that may not be enough. You need to establish more than basics, like a recovery plan that protects both data and endpoints.…

885 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