title: Online Voting Application. How to avoid repeated voting from same user
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/7775968/unique-ips-in-a-voting-system">Unique IPs in a voting system</a>  </p>
  </blockquote>
  
  
  
  <p>I am developing a small web app where it needs an online voting system using php for my college event. I was obtaining IP Address and storing it in database to prevent repeated voting from same user. But then I remembered that my college uses a proxy server so obtaining IP address is useless.
  I tried accessing and storing Mac Address of the client using javascript.. I tried out a few examples that i found on the internet.. but none of them worked.
  Can you guys suggest me an alternative to how can I get the results I want??</p>
  
  <p>Any sort of help would be heartily appreciated.</p>
  
  <p>Regards,
  Aayush Shrestha
  Nepal</p>