Hi all. I've have a problem with workstations thinking they are the masterbrowser for my Windows 2000 domain. This is happening because I'm using ip helper addresses to broadcast dhcp requests on the router that connects another network on the same subnet . As a result, netbios udp broadcasts on ports 137 and 138 are also being forwarded, causing the master browser issue. What is the command to disable udp or broadcast forwarding on specific ports?