Patent ID: 8161141
Filing Date: 2012-04-17
Classification: H04L

Abstract:
1. An apparatus comprising: a processor; a main dynamic domain name server (DDNS) that registers and stores an identifier and a dynamic IP address for a piece of equipment in a main database in communication with the main DDNS, and responds to a client query request with the dynamic IP address of the piece of equipment; and at least one sub-DDNS in communication with the main DDNS that receives a status notifying message from the piece of equipment that includes the identifier, searches for a survival count and a status corresponding to the identifier in a sub-database in communication with the sub-DDNS, and sets the survival count to a minimum value or reregisters the piece of equipment in response to the status notifying message sent from the piece of equipment; wherein the main DDNS comprises: wherein the main DDNS generates a warning message when a number of pieces of equipment in the plurality of pieces of equipment processed in the at least one of the sub-DDNS exceeds a reference value.