Java URLConnection Error
<p>This error is from a PC connected to a comcast modem. Is port blocking an issue when a person is trying to make an outbound TCP channel with a Java URL . . .  the relevant code is :</p>

<pre><code>URL u = new URL("mailto:someguy@gmail.com");    // make a mailto: url
URLConnection c = u.openConnection();   // make its urlconnection
c.connect();                // connect to mail host

catch (Exception e) {   // handle any exceptions, print error message
  System.err.println(e);
}
</code></pre>

<p>The console returns the message :</p>

<p>connect. Timeout = -1
java.net.UnknownHostException: mailhost</p>
