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DNS loopback not as the first entry

Elankeeran Raveendran 11 Reputation points
2020-08-05T12:39:55.323+00:00

I have only one DNS Server, sothat I have to enter the IP of the Server as the first entry. Best Practice analyser is showing this configuration as an error. How can I fix it? Or can I just ignore it, since I have only one DNS Server?

Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. Sunny Qi 11,076 Reputation points Microsoft External Staff
    2020-08-06T04:48:08.16+00:00

    Hi,

    Thanks for posting here.

    If you only have a single Domain Controller/DNS server, you can safely ignore this issue. If you have more than one, you should be setting the primary DNS server to the IP of the other Domain Controller and setting the secondary DNS server to the loopback interface and vice versa on the other DC.

    You get this error with all of your configurations, because the IP of DNS server is the local interface, so it's effectively the same as 127.0.0.1 as far as DNS and the BPA are concerned.

    This is the best practice so that a DNS server isn't reliant on itself for name resolution, which would affect replication in a multi-DC environment. If you only have a single Domain Controller, you'll continue to get this error because, well, only having 1 DC isn't best practice.

    You can refer to the following article on IP settings:
    https://social.technet.microsoft.com/wiki/contents/articles/18513.active-directory-replication-issues-basic-troubleshooting-steps-single-ad-domain-in-a-single-ad-forest.aspx

    Hope my answer will help you. Thanks!

    ---Please Accept as answer if the reply is helpful---

    Best Regards,
    Sunny

    2 people found this answer helpful.
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  2. Anonymous
    2020-08-05T13:04:18.357+00:00

    You can add the DNS server's own static ip address as primary and use loopback (127.0.0.1) as secondary on connection properties.
    https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/ff807362(v=ws.10)?redirectedfrom=MSDN

    --please don't forget to Accept as answer if the reply is helpful--

    1 person found this answer helpful.

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