Proxies and Real IP addresses...

Hi, I recently found the following message posted on here, its from 2001:

>hi 
>    i m writing a small webserver. i just want to know that when the client connects to the webserver through proxy
>th webserver gets the  proxy ip. is there any way by which i can get the actual client ip.
>
>Ajay

The answers pretty much were all no.  My question is about the same.  Has a way been found around the IP masquerading of proxies?  Would something as simple as a hidden field in a form that contains the IP from the remote computer make it through the proxy?  Or is there a much more complex solution?

Thanks

Remi