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I am sorry for imperfect terminology (have only very basic understanding of network administration).

I have two DNS:

  • Public DNS which manages zone 1
  • Internal DNS (which is AD DNS based on Windows Server 2012R2) which manages zone 2.

I need to change it to do a split-brain DNS for zone 1. However, I don't want to have a whole zone 1 in both DNS.

All I need is resolving just one host from zone 1 on internal DNS to internal IP and forward everything else zone 1 related to public DNS.

My question is how to configure it on this AD DNS, Windows Server 2012R2.

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Create a zone for the name that you want to resolve. For example:

cloud.joewebster.com

Then create an A record in the zone leaving the name blank (same as parent).

See my screenshots for an example:

enter image description here

enter image description here

So cloud.joewebster.com is resolved to the internal ip address and all other DNS records in the joewebster.com DNS zone are forwarded externally to the public DNS servers that host the joewebster.com DNS zone.

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