When VPN enabled, lost DNS and DCO / Event ID 8015, 334 ...

El Tistou 101 Reputation points
2021-05-15T10:33:08.837+00:00

Hello all,
On a Windows Server 2019, when I'm connected on the VPN (IKEV), I lost the connection with local DNS (event ID : 8015).
I lost the communication with my DC (event ID : 334, 5719, 1054).
Of course when I try to connect on shared folder : \nameofcomputer it don't work ... (by IP : yes).
When someone connect on this server it's very long and the VPN disconnect.
NSLookup show that it's the DNS remote who is by default.
So I change the metric, I enter "1" on my network adapter.
NSLookup show :
DNS Request timed out
Default server : Unknow
Address : 192.168.0.1

Thanks in advance for your help.

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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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. Anonymous
    2021-05-15T18:00:06.17+00:00

    Just checking if there's any progress or updates?

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

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  2. El Tistou 101 Reputation points
    2021-05-15T19:27:15.373+00:00

    I have not explained enough.

    In fact "use default gateway on remote desktop" don't change the result (check or uncheck).
    The ipconfig of VPN is the same :
    gateway : 0.0.0.0

    And the nslookup give always : "DNS request timed out" (witch change metric).

    I said "no option "gateway"" to put a IP address.

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  3. Anonymous
    2021-05-15T19:30:16.243+00:00

    DNS request timed out

    I'd check the correct DNS server are being used. Generally a vpn client connection inherits the DNS servers used on the RRAS server.

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

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  4. El Tistou 101 Reputation points
    2021-05-15T19:32:29.237+00:00

    96876-image.png

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  5. Anonymous
    2021-05-15T19:34:45.577+00:00

    Looks like a firewall is blocking. I'd check the required ports are flowing between networks.
    https://video2.skills-academy.com/en-us/troubleshoot/windows-server/identity/config-firewall-for-ad-domains-and-trusts
    https://www.microsoft.com/en-us/download/details.aspx?id=24009

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

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