Method and apparatus for supporting remote access to internet of things device connected to private networks

A router for supporting a remote access to an Internet of things (IOT) device connected to a private network, the router comprising:

• a memory configured to store information and data received from or transmitted to other devices, and generated in the router and store a port forwarding table;
• a transceiver circuit configured to receive a remote access request message including a service port number of an IoT device connected to a private network from a user equipment of a network operator connected to the router through a public network;
• and
• a processor circuit configured to perform port forwarding between the user equipment and the IoT device using a private IP address corresponding to the service port number of the IOT device based on the port forwarding table stored in the memory,
• wherein:
• the processor circuit is configured to determine data validity of connected IOT device information by comparing the connected IOT device information with registered IoT device information;
• and
• the transceiver circuit is configured to transmit an update request message to a database for updating the registered IoT device information based on a result of comparing the connected IoT device information with the registered IoT device information, wherein the registered IoT device information is updated at the database based on the update request message,
• wherein the processor circuit is configured to:
• allocate the private IP address to the IoT device connected to the router and manage the allocated private IP address and connected IoT device information on the IoT device;
• and
• collect information on registered IoT device information for IOT devices registered at the database from the database, wherein the connected IOT device information includes a MAC address, a private IP address, a service port number, a lease period of the private IP address, and a public IP address of the router
• wherein the processor circuit is configured to:
• compare a number of private IP addresses allocated to IoT devices connected to the router with a number of IP addresses registered at the database;
• and
• determine that a new IOT device is connected to the router or a connected IoT device is released in an event that the number of private IP addresses allocated to IoT devices is not matched with the number of IP addresses registered at the database.