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We have a server machine with IP address = 192.168.90.6. On this machine we have installed DNS and Domain Controller and DNS is integrated with AD (ad.corp.com).

Case 1: When machine joins with ad.corp.com, then there is no issue.
Case 2: When machine doesn't join with ad.corp.com, then problem happens, i.e. we cannot access domain machine by using its name. But when IP address is used, it works properly.

I want to know how we can change the setting of DNS Server to resolve Case 2 issue?

Result of nslookup on client machine is as per below:

C:\Users\abc>nslookup - 192.168.90.6

Default Server:  UnKnown
Address:  192.168.90.6

> dc1
Server:  UnKnown
Address:  192.168.90.6

*** UnKnown can't find dc1: Server failed
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2 Answers 2

0)

ad.corp.com

The corp.com domain is owned by Mike O'Connor who isn't currently using it for much. If you are also using that domain internally you have a recipe for future confusion when Mike sells it to someone or starts using it in earnest (or even now).


1)

Default Server:  UnKnown
Address:  192.168.90.6

Your DNS server at 192.168.90.6 doesn't know who it is! It lacks a PTR record in a 192.168.90 zonefile

6   IN   PTR   dc1.example.com.

or MS equivalent.

I recommend you register a domain for your company and use it internally using a split-horizon DNS setup. Or pay a consultant to advise.


2)

> dc1 
Server:  UnKnown   
Address:  192.168.90.6  

*** UnKnown can't find dc1: Server failed

Your DNS server has no idea what DNS domain to append to incomplete queries


These are all fairly fundamental issues suggesting that whoever set this up needs more training or to call in a consultant.

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Thanks RedGrittyBrick for you reply, I want to clear my issue again so that you know the exact problem. When my client machine Joined with domain ad.corp.com then nslookup result is as per below C:\Users\abc>nslookup - 192.168.90.6 Default Server: UnKnown Address: 192.168.90.6 > dc1 Server: UnKnown Address: 192.168.90.6 Name: dc1.ad.acty-sys.co.in Address: 192.168.90.225 –  Acty System Aug 1 '12 at 11:21
    
BUT when I UNJOINED Client machine with domain ad.corp.com then it gives following result ..... > dc1 Server: UnKnown Address: 192.168.90.6 *** UnKnown can't find dc1: Server failed I am facing this problem, hope you understand my problem. Please kindly help me for the same. –  Acty System Aug 1 '12 at 11:31

You should configure your "DNS Server's IP" as prefered DNS Server at your un-joined client first. It should work.

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Thanks Rajendra for your reply I have configured my client machine with DNS Server's IP as prefered DNS server but still it is not working. Result of nslookup is same as above. –  Acty System Aug 3 '12 at 4:32
    
@Acty System: - Please perform a cross check that, Did you created associate PTR records in DNS Server? and please use Server's FQDN for accessing it from outsite or unjoined clients. Such as : - (dc1.example.local) –  Rajendra Rathore Aug 3 '12 at 17:33

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