How to set Default Proxy for "ApplicationPoolIdentity"?

Question

We are running a dotnet-core 3.1 MVC App on IIS 10. The app needs to connect to a local ressource without the proxy.

However our IT department provisions the VMs with Proxy configuration. For a local user I can simply remove the Proxy in IE Settings, Registry or netsh.

But the app running in an application pool under the ApplicationPoolIdentity keeps using a proxy and I am out of ideas where it is getting it from. As a workaround setting the ApplicationPoolIdentity to the my local user works.

What I tried so far:

1. Setting the web.config settings, but seems like its not working for MVC

2. Setting Environment variables in web.config:

3. Setting the same Environment Variables via System Variables

Answer 1

The solution is to actively set the Proxy variables, although you dont want to use them.

That's because .net core automatically falls back to the user's proxy settings on windows.

So your web.config has to look like this:

Attention: Be sure to write your NO_PROXY variable without * (*.domain.de) as .net core does not know how to parse it. Just use .domain.de.