Windows 11 - DHCP server strange behavior

Yann Dublanche 111 Reputation points
2021-10-29T06:34:29.917+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 depending on the IP settings of the computer.

If I am connected by VPN with an IP address provided by the VPN DHCP service, everything works as expected.

If I am connected to the internal network with the IP address provided by the DHCP service located on one corporate Windows server:

  • 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

If I am connected to the internal network with the IP address provided in theory by the DHCP server configured manually on the computer, everything works as expected.

Has anybody experienced the same issue? It seems that the DHCP service is not providing only IP address, netmask, gateway and DNS or that Windows 11 is expecting more information that are currently not configured in our DHCP 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.
1,021 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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  1. Limitless Technology 39,331 Reputation points
    2021-10-29T09:49:58.203+00:00

    Hello

    This may see some transition issue between local settings and VPN setting. Perform the next steps while connected to VPN and then test again.

    From an elevated command prompt execute on the client (connected to VPN):

    ipconfig /flushdns
    ipconfig /registerdns

    then to see the saved information:

    ipconfig/displaydns

    --If the reply is helpful, please Upvote and Accept as answer--

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