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JamesCrk's avatar
JamesCrk
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Apr 17, 2023

APM RDP Remote resource cannot be reached

 14.1.5.2 with APM Hi, we have APM confiugred presenting native rdp to users. we have serval hundred users using this on a daily basis without issue, but we now have 3 users who cannot launch the rd...
security
  • JamesCrk's avatar
    JamesCrk
    Apr 27, 2023

    Found out it was related to registry string: RDGClientTransport

    if its not present or set to 0 (which is default) it will work. if its set to 1 or 2 it will fail with that error.

     

lnxgeek's avatar
lnxgeek
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My next step would be to validate if any packages are leaving the machine with Wireshark.

If that isn't the case I think it must be related to application firewalling (or what it is called on Windows 😀) which stop the traffic from going out.

JamesCrk's avatar
JamesCrk
Icon for Cirrus rankCirrus
Apr 27, 2023

Found out it was related to registry string: RDGClientTransport

if its not present or set to 0 (which is default) it will work. if its set to 1 or 2 it will fail with that error.

 

  • lnxgeek's avatar
    lnxgeek
    Icon for MVP rankMVP
    Apr 28, 2023

    Fantastic! 😁

    Do you have any documentation of this setting?

    It sounds interessting.

    • JamesCrk's avatar
      JamesCrk
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      Apr 28, 2023

      Just what I found on google:

       

      The Remote Desktop Protocol v8 introduced the HTTP & UDP transports. The values for the RDGClientTransport registry key are;

      • 0 (default – HTTP) (also known at “negotiate NLA using TLS”)
      • 1 RPC over HTTP (also known as “RDP Security”)
      • 2 RemoteDesktopGateway (WinHTTP)