We have a document management system (CyberDOCS) that is accessable via our INTRAnet and the INTERnet. The initial page is a login screen where INTRAnet users can sign in to the system, INTERnet users need to log in as GUEST. There is a way to bypass the login screen and automatically connect as guest, but I need a way to determine if the user is coming from the INTRAnet (a specific series of IP addresses -- 170.213.xxx.xxx or 10.xxx.xxx.xxx) or from the INTERnet, then I can direct them either to the log in screen or directly log them in as guest. Is there a way to determine the user's IP address or any other ideas about how to solve this problem? Thanks!