MultiNet FAQ: DHCP
Can I configure DHCP to ignore requests sent by Microsoft's RAS server?
Yes, you can configure DHCP to ignore these requests.
Place the deny/allow ras-servers option statement in the configuration file at the global level, or place it in a shared-network or subnet statement. The statement applies to the scope (global or subnet, etc.) of the file in which it is placed. The default is allow ras-servers.