title: PHP Post Data Over VPN
body: <p>I need to connect to a webservice which is <code>behind of a VPN</code> via PHP. My server is Debian Linux (Squeeze). </p>
  
  <ol>
  <li>Is it possible to accomplish this via PHP on Linux? </li>
  <li>Is it risky to do this if it is possible? (When VPN connection hangs etc., does the operating system or any other what-so-over handles the situation)</li>
  <li>I have only one network card, therefore I really wonder whether it is possible to keep server online for normal users while "posting data over an accomplished VPN connection in the background".</li>
  </ol>
  
  <p>Although my question seems to a conceptual question, any specific help is also welcome.</p>
  
  <blockquote>
    <p><strong>Server OS</strong>  : Debian Linux Squeeze (x64)<br>
    <strong>Web Server</strong> : Apache HTTP<br>
    <strong>PHP Version</strong>: 5.3<br>
    <strong>Framework</strong>: Symfony 1.4</p>
  </blockquote>