Request timeout from ASP.NET Core app on IIS

Question

I make a web request to a third-party api from my ASP.NET Core application.

1. When app is running alone itself, request succeeds.
2. When app is running in IIS on the same server, request timeouts.

Request is made from a Hangfire recurring job to Asana API endpoint (HTTPS) via RestSharp client. All the own app's pages are available through IIS, but app cannot make any requests.

Where should I look and what to debug to solve this problem?

Answer 1

IIS behavior is driven by the web.config, I have configured to deal with request < 20 min specifying requestTimeout="00:20:00":

<aspNetCore
  requestTimeout="00:20:00"
  processPath="%LAUNCHER_PATH%"
  arguments="%LAUNCHER_ARGS%"
  stdoutLogEnabled="false"
  stdoutLogFile=".\logs\stdout"
  forwardWindowsAuthToken="false">
  <environmentVariables>
    <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="staging" /> <!-- value could be "development", "staging" or "production"-->
  </environmentVariables>
</aspNetCore>