how cloacking works?

i want to erite one of my own
can someone explain to me how it should work
thanks

A cloaking script looks at IP address, the User-Agent string of the browser, the referring URL. The script will make a decision based on this information and serve the appropriate content to the visitor.

I thought of creating one using a google ip list i found on the web. If the ip of the visitor was found in the the ip database then the bot would be redirected to my keyword spammed pages. Otherwise my normal content would be displayed. It turned out to be too big of a project for me since there is more than one search engine and way too many ip's to get.

SE ip lists are available - but there are many redirect scripts, why reinvent the wheel?

Our database of search engine ip's is well over 18,000 and growing. It's no small task coming up with a decent list of ip's. IP based cloaking is definitely the way to go right now though. It's far more difficult to detect.