A method of controlling a peer-to-peer (P2P) connection of an image forming apparatus that supports the P2P connection includes: receiving in the image forming apparatus a P2P connection request from an external wireless device; checking a device type of the wireless device by the image forming apparatus; determining whether the device type corresponds to connection restricted device types; and when the device type is the connection restricted device type, blocking a P2P connection to the wireless device by the image forming apparatus, and when the device type is not the connection restricted device type, P2P connecting the image forming apparatus to the wireless device.