ok. I have my little network running Windows Server 2003 - I have over 500 users, but there are 2 students who are plugging into my network using windows XP systems. The names are generic, so I can't detect which one of the 1000 students it is, but I want them off my network, It was recommended to me to route them to a bogus DNS address using their mac address, but I'm not sure where to start (I do have their mac addresses off my server) . . . Help