I am trying to determine the ip address of a remote computer accessing my webpage. I do this to determine if the user if logged on elsewhere. If so, the server will reject actions from the previous location and log the user in from the new location. However, since all the computers are behind the gateway, I use $_SERVER['REMOTE_ADDR']; and only get the static ip of the gateway. Is there anyway to find out which specific computer is trying to login?
If not, is there any other way of trying to keep the user session valid from one computer at one time only??
thanks.