Track a user that is not logged in
<p>Is it possible to track not logged in user without using session or a cookie? Is there a more reliable way?<br>
Just like www.filefactory.com or other similar download space website, they can track if you are free user and send download request, before starting next download you must wait x time, I was thinking it used session or cookies, but after clearing session and cookie or change IP address, it's still the same.   </p>

<p>I'm a newbie trying to create a website, I have to track user before logged in like this example site, I'm using php and javascript set session and timeout to keep catch user status (to write file in dir or ...
I've been searching a long time, if anyone knows any tutorial or just a little clue how to do it like this site it would be appreciated..  </p>

<p>Thanks!</p>
