title: docker assigned an ip I can not find ipconfig but it exists
body: <p>On Windows 7 I installed docker which brings up a headless VM. For the first test I built the largest <code>nginx</code> and ran <code>8080:80</code>, but then I could not browse it on my Windows.</p>
  
  <p>Attempts by <code>localhost:8080</code> failed.</p>
  
  <p>Then I performed:</p>
  
  <pre><code>docker inspect [MY-CONTEINER-ID]
  </code></pre>
  
  <p>I tried to use the <code>ip</code> I found there as <code>172</code>, obviously another fail</p>
  
  <p>Further I used <code>ipconfig</code> on Windows and I found <code>192.168.99.1</code>, but it also failed. Eventually after hours, I accidentally browsed <code>192.168.99.100:8080</code> and it worked!</p>
  
  <p>Could you please let me know that how I could find where this <code>192.168.99.100</code> is assigned, what the logic is and by which command I could reveal it?</p>