A system and method are disclosed for implementing a modified form of User Datagram Protocol (UDP) multicast notification system in a client-server architecture that otherwise allows only client initiated messages. The method includes: receiving a registration message at a server from a client with a client IP address in the registration message, wherein the registration message includes types of notifications desired to be received by the client, and wherein the server is a Download and Configuration Management (DCM) engine; adding the client IP address to a registration message database; receiving a request for a port number from the DCM engine; and responding to the request for the port number.