Patent ID: 8477753

Claim:
A wireless LAN device that connects with multiple clients to construct a wireless LAN, said wireless LAN device comprising: a processor that executes computer codes; an input-output circuit that receives communication transmitted from any one of the multiple clients of the wireless LAN to another client in the wireless LAN, or to another network, the wireless LAN device operating as the access point to provide wireless LAN access service in a local area such that each wireless client in the wireless LAN communicates via the wireless LAN device; a communication reception computer code for receiving, via the input-output circuit, a request for communication transmitted from any one of the multiple clients of the wireless LAN to another client in the wireless LAN or to another network; a registration computer code for registering a specified client among the multiple clients of the wireless LAN as a registered specific client; a decision computer code for determining whether or not the request for communication is directed to the registered specified client; and a restriction computer code for restricting communication between clients within the wireless LAN via the communication reception computer code based on a protocol used for the communication, the restriction computer code permitting the communication from one of the multiple clients to the registered specified client for a protocol used for the communication being a specific protocol and rejecting the communication from the same one of the multiple clients to the registered specified client for other protocols so as to limit the communication within the wireless LAN when it is determined that the request for communication is directed to the registered specified client, and so as not to restrict the communication when said decision module determines that the request for communication is not directed to the registered specified client, wherein: (a) if a source MAC address is of the registered specific client, then the communication is permitted without any restrictions; and (b) if the source MAC address is not of the registered specific client, judging whether a destination IP address if of the registered specific client or not, including: (1) if the destination IP address is of the registered specific client, the communication is permitted only when the communication is by the permitted protocol; and (2) if the destination IP address is not of the registered specific client, the communication is permitted without any restrictions.