title: Which ports will python use to send html request? with urllib or urllib2
body: <p>I'm using webpy to make a small site. When I want to use OAuth, i find that the firewall will stop the http request to any site, I even can't use IE to browse the Internet.</p>
  
  <p>So i asked the aministrator to open some ports for me, but i don't know which ports will be used by python or IE to send http request.</p>
  
  <p>Thanks!</p>