FIELD: computer equipment.
SUBSTANCE: invention relates to the computer equipment. Image forming device comprises: a network port for accessing a specific network through a network server; and network monitoring device, wherein network monitoring device includes: data collection means; a data analyzer connected to the data collection means and configured to analyze the network data to determine whether the network data transmitted from the data collection means contain information indicating that the image forming device is connected to the specific network; and a warning message transmitter connected to the data analyzer and configured to transmit a warning message to the imaging device user if the data analyzer determines that the network data contain information indicating that the image forming device is connected to the specific network.
EFFECT: providing security of document transmission by an image forming device.
18 cl, 6 dwg
