RE: [PHP] IP spoof

> We run a link exchange that tracks unique IP's for display count and > clicks. However I am almost positive that there are people cheating by > feeding the system IP addresses and referrers. I am 99% sure people are > doing it, the thing is how? I need to find out how to do it myself so I > can implement counter measures against it. Is this something that can be > done in PHP? Well there's thousands of public proxy servers out there...simply having a script that uses those proxies to connect to your site with various information is very easy. The trick to catching these people is to realize that almost all of these people are pretty stupid when it comes to programming....they just look for the easiest way to fool your system but don't hit all the angles....doing additional checks like cookies or javascript being enabled is a definate start. Then you can help single out crooks just based on averages...example...if you record approx. 15% of incoming hits (overall) have javascript disabled browsers...then you know if you find a guy who has 80% of his hits having javascript disabled may be up to something...I have plenty of other ideas from all the link exchange and affiliate programs I've designed but I can't reveal all my trade secrets :) That should at least get you to think. Sincerely, Craig Vincent ------------------------- Senior Programmer Jazzmonkey Media Inc. http://www.jazzmonkey.com -------------------------