title: cannot ping http://localhost:3000 with Rails
body: <p>I cannot ping <a href="http://localhost:3000" rel="nofollow">http://localhost:3000</a> from my terminal with Webrick running.
  However, when loading it on a web browser I get the default "Welcome abroad" page.
  I'm using Rails as a backend service for a mobile app - so I need to access the API this way.</p>
  
  <pre><code>&gt;ping http://localhost:3000/
  ping: cannot resolve http://localhost:3000/: Unknown host
  &gt;ping http://127.0.0.1
  ping: cannot resolve http://127.0.0.1: Unknown host
  &gt;ping http://127.0.0.1:3000
  ping: cannot resolve http://127.0.0.1:3000: Unknown host
  </code></pre>