Unable to connect to the Remote Debugging - Web App Azure

It seems remote debugging is not turned on for your App Service.

Open your App Service in the Azure portal and go to Application Settings. Then turn Remote Debugging to On and select Visual Studio Version to 2017.

It should look like this: Screenshot source

I hope this helps.

The issue is resolved. We had to open outbound ports 4024 for VS 2019, 4022 for VS 2017 and 4020 for VS 2015 on corporate firewall.

For more info check these out:

• https://docs.microsoft.com/en-us/visualstudio/debugger/remote-debugger-port-assignments?view=vs-2019
  

• https://docs.microsoft.com/en-us/visualstudio/debugger/configure-the-windows-firewall-for-remote-debugging?view=vs-2019

I also had this problem. I solved it by changing the Platform from 32-bit to 64-bit in Application Settings as I am trying to debug from 64-bit machine.