Issues with Remote Desktop on Windows 11 after Update 22H2

Anonymous
2022-09-22T13:54:07+00:00

All of our Remote Desktop Users using Windows 11 are having problems connecting to Remote Desktop after installing this update. It just hangs at connecting.

We have found that there is a bug in the Remote Desktop client so that it is only trying the UDP connection and not trying TCP connection. We only allow the port 443 connection through on our firewall.

The only workaround we have found is to make the following change on the Windows 11 computer.

Have to set this value to 1 in the registry for Windows 11 client to work outside the network

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client

KEY VALUE - fClientDisableUDP SET TO 1

Otherwise the Remote client just keeps trying to connect via UDP.

This issue did not start until the Windows 11 update was installed over the last couple days.

Jeff

Windows for business | Windows Server | User experience | Remote desktop clients

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  1. Anonymous
    2023-08-04T15:17:42+00:00

    I turned off networking in the Dell Optimiser and suddenly everything worked.

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  2. Anonymous
    2023-05-23T18:41:09+00:00

    Anyone still having problems (or having new problems) I suggest you take a look at this article;

    https://petri.com/microsoft-slow-vpn-connection-windows-11/

    Un-install KB5026372

    This has fixed the VPN/RDP issues for several of my customers.

    DEAR MICROSOFT - STOP PUSHING OUT UPDATES THAT BREAK VPN AND RDP!!

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  3. Anonymous
    2022-09-27T19:21:38+00:00

    We are no allowing UDP through intentionally. To reiterate, all Windows 11 computers that do not have the 22h2 update installed are working. No other devices (windows 7,8,10) have the registry setting set to disable UDP for rdp. They are all working with no issues the same as Windows 11 computers before the 22h2 update.

    The Gateway does not have the UDP port Disabled for 3391 traffic.

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  4. Anonymous
    2022-09-27T18:13:26+00:00

    Hello,

    I have questions:

    It looks like there is an RD Gateway involved since you are allowing 443 traffic.

    Are you using an RDS Farm (Broker, RDWeb) or just a standard RDP from Client to a target with a gateway address?

    What is the Windows 11 build number? Edition?

    What is the Windows operating System of your RD Gateway?

    What do the RD Gateway logs report when the connection fails? eventvwr.msc > Application and Services Logs > Microsoft > Windows > TerminalServices-Gateway (admin/Operational).

    Thanks!

    Nouri

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  5. Anonymous
    2022-09-27T14:56:21+00:00

    This solved the issue for us too - Thank you Jeff.

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