title: How do I get the client IP and Port from it's NAT via HTTP?
body: <p>I want to make an application to send email and messages directly to other clients as a <code>P2P</code> service, using a web server to maintain a list of clients online with registration of the <code>IP</code> and <code>Port</code> sent by the <code>NAT</code> in which the client will read the list to connect directly to destiny client.</p>
  
  <p>Is it possible to receive this information in an <code>HTTP</code> Web Server? How do I do it? Or may I use only an <code>UDP</code> server (<code>UDP Hole Punch</code>)?</p>
  
  <p><em>Something like primordial Skype, but with web server.</em></p>