Many of you may aware that AOL using floating IP address to manage their internet connection. When I develop my shopping cart, I used IP address as one of the variables to identify user (other variables are datetime and url) and its shopping cart content. It was alright until someone using AOL to browser the site. I'm forced to use only two parts of the 4-part IP address to avoid any error due to floating IP. The code is so far running ok, however, I'm not convience it will stay ok forever as floating IP can change all four parts of the IP address. Can anyone suggest a better way?
Note: I'm not using session nor cookies as some people disabled these beautiful functions.