title: network access through proxy server with virtualbox
body: <p>In the company that I work, we have Windows 7 installed on all PCs. We don't have internet access through Windows but can set proxy settings in Firefox and can thus access the Internet.</p>
  
  <p>I installed a virtual box on one of these Windows 7 machines and Ubuntu 14.10 but I have problem with accessing the Internet.</p>
  
  <p>How can I access the Internet through the proxy server via an Ubuntu virtual box running under Windows 7?</p>