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DNS Resolution

Techop09
Techop09 asked
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Last Modified: 2013-11-19
Hello,

We have a 2-way Active Directory transitive trust between our domain and a partner's domain.  Both domains have DNS integrated.  When we try to ping a server/workstation on the partner's domain by ONLY their hostname, it does not resolve.  However, if we try to ping using their FQDNs, it pings just fine.  Is this the expected behavior of AD DNS?  If so, is there any way to configure AD DNS so that we'd be able to ping hosts on the trusted domain by only their hostnames?  Thank you.
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Yes -- That  is the expected behavior.  You can add DNs suffixes in the Advance TCP/IP DNS tab on systems that have a static IP assignment.  

You can also do this in DHCP:

1.Open DHCP. (To open DHCP, click Start, point to Settings, click Control Panel, double-click Administrative Tools, and then double-click DHCP.)
2. In the console tree, click the applicable DHCP server.
3. On the Action menu, click Set Predefined Options.
4. In Predefined Options and Values, click Add (Option Class Standard), and then click OK.
5. In Name, type the string DNS Search List.
6. Set Code to 119 and Data Type string (it is not an array), and then click OK.
7. Right-click Scope Options, select Configure Options, and then check 119 DNS Search List.
8. Enter a list of domain suffixes in your organization, delimited by a semicolon (for example, contoso.com;dev.contoso.com;corp.microsoft.com).
9. Click OK.
(Copied from http://technet.microsoft.com/en-us/library/dd572752(v=office.13).aspx)

Tom
CERTIFIED EXPERT
Top Expert 2013

Commented:
Yes that is expected behavior, you can add the DNS suffix to your search list.   Lots of good articles on that, one example below  

http://www.techrepublic.com/blog/the-enterprise-cloud/manage-dns-suffix-configuration-through-group-policy/

Thanks

Mike

Author

Commented:
Thank you for your responses.  I'm aware that you can add DNS suffixes at the client level.  Does anyone know of a more global solution where the DNS servers themselves are changed to allow resolutions of the hosts without their FQDNs?
You could look at the zone that is designed to help with the migration from WINS, but I wouldn't recommend it as it requires static entries.

Overall, I don't think this is feasible -- the client makes the FQDN request and it will use its own DNS suffix when using a host name.  The DNS server will attempt to answer based on the FQDN.

Tom
Architect
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Distinguished Expert 2019
Commented:
This one is on us!
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