Windows 11 - DNS issue

Yann Dublanche 111 Reputation points
2021-10-24T20:57:03.95+00:00

Hello

I am currently testing the compatibility of our organization with Windows 11 and I am facing a strange behavior. The DNS service is not working well with Windows 11.

On Windows 10 there is no issue and all the IP addresses are resolved correctly from our DNS, but on Windows 11, the DNS results are strange:

  • If the request belongs to our main domain, nslookup provides the correct internal IP address
  • If the request belongs to an internal domain only, nslookup provides the correct internal IP address
  • If the request belongs to any other domain, nslookup provides the public IP address instead of the internal IP address

This is only happening from the internal network. If I connect by VPN, using the same DNS servers, then the result is correct in every case.

Has anybody experienced the same issue? Is this a problem of the Windows 11 desktop, the DNS server...?

Thanks in advance

Best regards

Yann

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.
1,023 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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Accepted answer
  1. Yann Dublanche 111 Reputation points
    2021-10-28T16:17:06.307+00:00

    Dear all

    I have found a solution that solve my issue but generate a bigger concern.
    I have just tried to configure manually the network connection of the laptop, using exactly the same IP address, mask, gateway and dns server that I was getting before from the DHCP server. And it works! Like this the DNS is correctly providing the internal IP address instead of the external one.

    If I then configure back the network through DHCP, it fails again.

    It looks like if the DHCP server is giving more information than just the IP configuration.

    Has anybody experienced this kind of issue?

    Thanks in advance

    Best regards

    Yann

    1 person found this answer helpful.

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  1. Dave Patrick 426.1K Reputation points MVP
    2021-10-24T21:18:24.337+00:00

    If the request belongs to any other domain, nslookup provides the public IP address instead of the internal IP address

    Do you happen to have a public web site with the same name as internal domain? If so a split brain deployment may be needed.
    https://learn.microsoft.com/en-us/windows-server/networking/dns/deploy/split-brain-dns-deployment

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

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  2. Yann Dublanche 111 Reputation points
    2021-10-25T07:28:58.943+00:00

    Hello Patrick

    Thanks a lot for your answer. I will review it. But the strange thing is that we are having the correct behavior on Windows 10 client but it is failing on windows 11 client.

    Best regards

    Yann

  3. Dave Patrick 426.1K Reputation points MVP
    2021-10-25T14:05:41.237+00:00

    As a work-around you could try adding an A record named "www" and point it to the public domain address.

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

  4. Dave Patrick 426.1K Reputation points MVP
    2021-10-25T14:21:08.097+00:00

    You never really answered; is there a public domain with the same name as internal?

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