Abstract: In the present invention, when a client device sends mouse operation information to a server device, the server device performs image processing based on the mouse operation information received from the client device, creates image data including a mouse pointer and sends the image data to the client device. The client device adds a mouse pointer at a current moment to the image data including the mouse pointer, which has been sent from the server device, and outputs both of the mouse pointer created by the server device and the mouse pointer created by the client device on a screen.

Abstract: An emulation unit establishes a virtual network equivalent to a network to be managed by a firewall device based on network configuration information. A check performing unit gives an instruction to verify the policies set in the firewall device to the emulation unit. The emulation unit transmits a packet to the firewall device based on the given instruction through a connection unit. The check performing unit verifies the policies set in the firewall device based on the response from the firewall device.