title: Requests hanging on ports forwarded from docker container inside vagrant
body: <p>So I have a setup very similar to <a href="http://ochronus.com/docker-primer-django/" rel="noreferrer">this one</a> where I have a docker container running a web service inside of vagrant.</p>
  
  <p>When trying to make a request to the web service on the forwarded port in the docker container from <em>inside vagrant</em>, everything works fine, but when trying to make the request from outside, on my local box, the request just hangs forever. Also- it only hangs if the docker container is running, if it is not then the request just fails immediately as normal.</p>
  
  <p>I am forwarding the vagrant ports via:</p>
  
  <p><code>config.vm.network :forwarded_port, guest: 3000, host: 3000</code></p>
  
  <p>and the docker ports via:</p>
  
  <p><code>docker run -p 3000:3000</code></p>
  
  <p>Any ideas?</p>