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Connection to the backend server failed. error (0x80072efe) RRS feed

  • Question

  • There is one application which we configured as on-Premise application on Azure with Microsoft AAD Application proxy connector. All the client locations are able to access the application except one. Users from that client location is receiving Bad gatway error. Connector server for those users have "connection to the backend server failed. error (0x80072efe)". Any guidance on this issue will be helpful.
    Wednesday, February 20, 2019 9:50 PM

Answers

  • Victim location recently implemented the some security measures to block unwanted requests. It was also blocking the "microsoftonline.com/.." URL as well. We got this URL marked as authentic URL which fixed the problem for that location.
    • Marked as answer by GuptaVipin Wednesday, May 15, 2019 10:24 PM
    Wednesday, May 15, 2019 10:24 PM

All replies

  • Hi Gupta,

    There are some simple fixes I would recommend in this situation. 

    1. Turn off Windows Firewall to fix the error. 

    - Go to Start > Control Panel > System and Security > Windows Firewall and turn it off. 

    2. Ensure that there is no Firewall or NSG in Azure that might be causing this. 

    3. Enable "File and Printer" sharing on the server.

    4. Check that the date and time are correct on the server and change the Date and Time if they are not correct.

    Let me know if this helps!

    Tuesday, February 26, 2019 1:11 AM
  • Victim location recently implemented the some security measures to block unwanted requests. It was also blocking the "microsoftonline.com/.." URL as well. We got this URL marked as authentic URL which fixed the problem for that location.
    • Marked as answer by GuptaVipin Wednesday, May 15, 2019 10:24 PM
    Wednesday, May 15, 2019 10:24 PM