How can I use Javascript to identify a client?
<p>I have a problem where I cannot identify visitors to my intranet page because their browser is configured to use a proxy, even for the local intranet. I always see the proxy IP and no other details about the client. The SOE that my company uses has the proxy set up already for Firefox and Internet Explorer, and I cannot ask them to reconfigure their browser because that is fairly complicated. I have tried using the PHP $_SERVER['REMOTE_ADDR'] and also one called $HTTP_SERVER_VARS['HTTP_X_FORWARD_FOR']. In fact, I wrote a page that lists both the $_SERVER and $HTTP_SERVER_VARS arrays and there was nothing informative of the actual client connecting. This is why I think it needs to be done on the client's side.</p>

<p>I'm not looking for a secure solution because it is only a simple page, so I was hoping that I could use Javascript or something similar to find something revealing about the client and send it to my intranet page as a GET variable. It's basically for collating statistics. It is no use telling me most of the visitors are a proxy! :)</p>

<p>I also want to avoid having users log in if possible.</p>
