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SBS2011 Preferred and Alternate DNS Settings.

Hi.

Our client is using SBS2011 (A swing migration from SBS2003)

We are troubleshooting some DNS issues and when we run DCDiag /test:dns we get some erros.

Looking at their Network card settings I can see that their Preferred DNS server is the IP address of the server, but they have an Alternate DNS server IP address set to a DNS server of their Broadband Provider.

I am sure this is not correct.

Can anyone help / advise please.

Thank you
Regards
Andy
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AndyKeen
Asked:
AndyKeen
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2 Solutions
 
Cliff GaliherCommented:
You are right. Remove the alternate.
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AndyKeenAuthor Commented:
Thank you cliff
Just to clarify - this client has a checkpoint box, then a TMG firewall then their SBS box - do I still remove the alternate?

ALSO

would this existing configuration cause any DNS issues at all?

Thanks again.
Andy
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Cliff GaliherCommented:
Any machines in an AD domain, including the DCs themselves, should only have DNS servers with the AD zones listed on their NIC settings. Alternates should never be a broadband provider , or even a 3rd party.
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AndyKeenAuthor Commented:
Thanks Cliff.

Excellent.
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AndyKeenAuthor Commented:
Great result - good answers and stayed engaged - Thank you.
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