I have a similar question - my W2K domain has DNS, DHCP, WINS, etc.. on all W2K / XP clients (no 95, 98, etc).
How can I keep someone from bringing in a laptop that is not part of the domain, connecting to the network, getting an IP address, and then connecting to the Internet? I have a Firebox 500 that I'm getting ready to hook up but I don't like the "authentication" method that they offer (have to logon and keep a java applet open?).
Any suggestions? Thanks