title: Python requests in IIS always times out
body: <p>I have a flask application running on a IIS server. Everything works fine, however I always get a timeout error when using requests.</p>
  
  <pre><code>import requests
  r = requests.get('https://github.com')
  </code></pre>
  
  <p>Using web services is therefore impossible.</p>
  
  <p>I have tried using headers with the requests. But still the same result:</p>
  
  <pre><code>headers = {'user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36'}
  r = requests.get('https://github.com', headers=headers)
  </code></pre>
  
  <p>Also tried increasing the timeouts limits, both in code and in the IIS.</p>
  
  <p>Also tried changing the Identity field under Process Model section to LocalSystem.</p>
  
  <p>I'm not familiar with IIS and I cannot think of anything else. Need help.</p>