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How do I move from using a conditional forwarder to a forward lookup zone for a limited number of host records?

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Last Modified: 2019-02-15
How do I move from using a conditional forwarder to a forward lookup zone for a limited number of host records?

To expand, I host AD integrated DNS for our domain (xyz.com), but we also need to lookup addresses for our parent company (abc.com). I currently have a conditional forwarder for them pointing to their internal DNS servers, which works fine. They now need me to add a A record for a service that has both an internal and external IP address (i.e. 192.168.1.100 internal and 23.23.23.5 external). When my users resolve the address, they get the internal IP address of the server, but we want them to connect to the external IP address.

I was thinking of just deleting the conditional forwarder reference and adding a forward lookup zone for abc.com, and then adding the A record for that server with the external address, but I am concerned that it will stop all other resolution for other abc.com services (due to the loss of the conditional forwarders pointing to their internal DNS server). Do I resolve this problem by adding their internal DNS server to the Forward lookup zone>Properties>Name Servers tab?
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Pete LongTechnical Architect
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Commented:
If you have a Cisco ASA firewall you can re-write the DNS reply to change it to the internal IP (DNS Doctoring)

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kevinhsiehNetwork Engineer
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Commented:
Cliff's answer is what I would propose also.
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