Is there some way that I can prevent someone from plugging into my network and getting an IP Address, but at the same time allow RIS clients to get IP Addresses when they need them? I'm the only one that uses RIS, but it would be a pain in the ass to have to enable DHCP every time I wanted to use RIS. I'm tired of people plugging their laptops into the domain subnet though, so I want to prevent them from getting IP Addresses. There are about 35 domain machines, and 2 servers running W2k3. There is a seperate subnet that is for wireless and wired personal laptops.