how to fix ERROR_DESTINATION_NOT_REACHABLE error in azure web app deployment using VSTS

Question

I am using VSTS pipeline to deploy asp.net core 2.2 MVC to azure web app. The last step which is deploy to azure fails - please see the error below:

##[error]Failed to deploy web package to App Service. 2019-01-08T21:39:47.3810424Z ##[error]Error Code: ERROR_DESTINATION_NOT_REACHABLE More Information: Could not connect to the remote computer ("our website url"). On the remote computer, make sure that Web Deploy is installed and that the required process ("Web Management Service") is started. Learn more at: http://go.microsoft.com/fwlink/?LinkId=221672#ERROR_DESTINATION_NOT_REACHABLE. Error: Unable to connect to the remote server Error: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond ????:443

I even tried to Take App Offline but no luck:

However, it works fine if I publish the web app through Visual studio.

Answer 1

The problem was the subscription we were using has a firewall in place. So there was no way to get into firewall by even doing things like adding "WEBSITE_WEBDEPLOY_USE_SCM" = false in the app setting of web service.

The only solution we could think of was to create an agent inside a VM sitting inside the same firewall.

Answer 2

Recreate web app in Azure Portal -> Make sure target framework selected correctly.

I had accidentally set this to docker previously during my web app setup in the portal and this error was produced as well. I was using a MVC .NET 4.7 project and trying to use web deploy.

Hopefully this helps someone who has perhaps set up their web app incorrectly in the azure portal.