Proxy! Kill'em all ...

[eluser]Twisted1919[/eluser]
Hi, i'm searching for a solution to stop people using proxy to visit my site .
What are the chances to do this using PHP or .htaccess ?
If you use something like this in CI or any other project , please post a code snippet or ideea .

Thank you !

[eluser]pistolPete[/eluser]
http://perishablepress.com/press/2008/04...-htaccess/

[eluser]Twisted1919[/eluser]
Yep, i did that but is not working for most of the proxy servers ...