NSLookup is returning the FQDN of my domain controllers

Posted on 2013-01-26
Last Modified: 2015-06-23
I set up a new zone of a web site. I specified 2 names servers: ns1.[INTERNET_DOMAIN_NAME].com and ns2.[INTERNET_DOMAIN_NAME].com.

When I run NSLookup against either name server, it shows those to FQDNs but it also returns the FQDN of both of my domain controllers. There are only 2 NS records in the zone. Why would it be returning 4 records and exposing that information publicly and how can I prevent that?

Thx so much,
Question by:SQLDave
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LVL 24

Expert Comment

by:Nagendra Pratap Singh
ID: 38823492
Is it possible to upload the output with actual details masked?

Author Comment

ID: 38823506
I'm not sure how useful that would be, but I did here is the results of just looking up google
NSLookup for google
The only difference in my scenario is that along with the 2 public NS records, it is also publishing my domain controllers complete with FQDN and their internal IP addresses.

Author Comment

ID: 38823529
It might help to add that if I create another new zone and don't add any NS records, it will still return 2 servers ( my domain controllers and their internal IPs ).
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Expert Comment

ID: 38823544
1-Do you perform the query from a workstation that joined to the domain ?
2-Is your query performed using the organization's internet connectivity ( from inside) or from outside ( public connectivity )?
LVL 24

Expert Comment

by:Nagendra Pratap Singh
ID: 38823547
outside PCs cannot connect to your DNS so it is all OK.

Author Comment

ID: 38823552
This DNS is for public consumption and the same information was definately public as it showed up using this tool as well.
LVL 31

Expert Comment

by:Henrik Johansson
ID: 38824356
Are you using same domain for public and internal namespacr?
If so, you nead to split the zone to have external zone on separate DNS server and the internal zone on internal DNS/DC.
Do not store external DNS zone as AD integrated zone on internal DCs

Author Comment

ID: 38824506
It is not the same domain, but it is the same server.

So I should set up 2 seperate DNS servers to service external DNS and make sure they are not AD integrated?
LVL 24

Accepted Solution

Nagendra Pratap Singh earned 100 total points
ID: 38825543
You should be able to use a forwarder for the external domains.
LVL 35

Expert Comment

by:Seth Simmons
ID: 40845601
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.

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