title: Why does InetAddress.isReachable return false, when I can ping the IP address?
body: <pre class="lang-java prettyprint-override"><code>InetAddress byName = InetAddress.getByName(&quot;173.39.161.140&quot;);
  System.out.println(byName);
  System.out.println(byName.isReachable(1000));
  </code></pre>
  <p>Why does <code>isReachable</code> return <code>false</code>? I can ping the IP.</p>