Remote access system, gateway, client device, program, and storage medium

An external device, positioned in a secure remote access system, including both a storage unit connected to a client device through a connecting member and a switching member for judging whether a boot program having been stored in the storage unit is to be transmitted to the client device,

• wherein the storage unit stores:
• (1) authentication information, wherein the boot program is to be:
• (2)-A transmitted from a transmitting device of the external device to the client device,
• (2)-B loaded into a memory within the client device in response to a positive judgment by the switching member, and
• (2)-C performed by a CPU within the client device, for controlling the client device to receive a first OS program from the external device,
• (2)-1 the first OS program is to be:
• (2)-1A transmitted from the transmitting device of the external device to the client device, and
• (2)-1B loaded into the memory within the client device in response to the positive judgment by the switching member,
• (2)-10A wherein the client device stores a second OS program operable in accordance with a dummy data to be transmitted to the client device in response to a negative judgment by the switching member, and
• (2)-10B wherein either one of the first or second OS program operable in the client is performed by a CPU within the client device for controlling the client device to receive a remote manipulation program from the external device,
• (2)-2 the remote manipulation program is to be:
• (2)-2A transmitted from the transmitting device of the external device to the client device,
• (2)-2B loaded into a memory within the client device, and
• (2)-2C performed by a CPU within the client device, reading address information where the client device accesses a server via a network, accessing the server based on the address information, checking operation of the server, turning on a power supply of the server if operation of the server cannot be checked, and controlling the client device to receive authentication information using an identification information acquired from an operator of the external device, to establish a communication path between the client device and a server device to be connected to the client device via a network, and to remotely control the server device.