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
    2022-10-03T09:27:55+00:00

    Remote apps are still an issue im trying to work out.

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  2. Anonymous
    2022-09-28T17:31:14+00:00

    I use rdp to access several different machines both on the same LAN and also a remote LAN via IPSec VPN.

    Only one machine is updated to win 11 22H2. That rdp connection, with the win 11 22H2 as host, opens but is frequently freezing and unfreezing. Is this behavior due to same issue? Other machines seem to be working the same as before.

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  3. Anonymous
    2022-09-27T19:53:48+00:00

    I have the same issue trying to use RDP also. If I'm trying to remote in from my Gaming PC using Windows 11 to my Mac Mini using Monterey 12.6 or from my Dell Laptop using Windows 11 via my openVPN to my Gaming Desktop I have the same issue NO remote desktop connection will go through. But if I use VNC View to my Mac Mini it works. If I use Team Viewer on any computer to any computer it works. Windows 11 is unable to establish any RDP sessions at all.

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  4. Anonymous
    2022-09-27T19:13:11+00:00

    Thanks Jeff, so you are intentionally blocking UDP to your Gateway and your Windows 11 22h2 devices are not working vs the Windows 10 Devices which are working fine. Can you please let me know if your Windows 10 devices have the same registry to disable UDP stack for rdp?

    Or by any chance does your Gateway have UDP port Disabled for 3391 traffic? (RD Gateway Manager > Properties > Transport Settings Tab - UDP Transport Settings).

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  5. Anonymous
    2022-09-27T18:53:38+00:00

    Thanks Jeff, so you are saying that UDP is blocked towards your Gateway and it is working for your Windows7/8/10 and not for W11 22h2?

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