title: Why does Ruby on Rails use http://0.0.0.0:3000 instead of http://localhost:3000?
body: <p>When I tried to follow the official &quot;<strong>Getting Started</strong>&quot; Ruby on Rails tutorial, it went wrong very quickly. Basically it said :</p>
  <blockquote>
  <p>…navigate to http://localhost:3000. You should see Rails’ default information page.</p>
  </blockquote>
  <p>But when I follow the instructions, I get</p>
  <pre>
  => Rails 2.3.4 application starting on http://0.0.0.0:3000
  </pre>
  <p>After trying both addresses, I know that they point to the same thing, but can someone explain to me why Ruby on Rails uses <code>http://0.0.0.0:3000</code> instead of <code>http://localhost:3000</code>?</p>
  <p>Is there a way to always have the WEBrick server use localhost?</p>