title: Vagrant: Accessing host machine localhost from guest machine (Mac)
body: <p>I'm trying to access localhost (a Rails app) from Internet Exporer running on a VirtualBox (via Vagrant).</p>
  
  <p>I've set up the following.<br>
  <code>config.vm.network "forwarded_port", guest: 3100, host: 3000</code></p>
  
  <p>Typing in the following into Internet Exporer running on the VM does not work:</p>
  
  <p><code>&lt;my host machines IP&gt;:3100</code><br>
  <code>0.0.0.0:3100</code><br>
  <code>localhost:3100</code>     </p>
  
  <p>Access to the guest machine from the host is does not work.</p>
  
  <p>Lots of tutorials online covering setting up Vagrant to test IE, but not much on accessing hosts localhost from the guest machine browser. </p>