its ip address 3 receiving an information packet of ip address from the new wireless station 250 4 requesting actively the new wireless station 250 for its name of computer 5 receiving an information packet of name of computer from the new wireless station 250 and 6 checking if the new wireless station is a legal one with an approved built in name list of computers of legal wireless stations to thereby via the snmp make a decision of providing service or interrupting service and notifying the system manager of an attack by an e mail video information or voice the applicable wireless network should comprise a plurality of wireless base stations or so called access points 240 242 244 for communication with a plurality of wireless stations 250 252 254 256 according to ieee 802 x wireless communication protocol referring to fig3 the operation procedure of this invention comprises the following steps 1 when a new wireless station 310 is found having a correct service set identifier ssid a correct key value of the wired equivalent privacy wep and a pre registered media access control address mac address on the access point an association 381 is to be made between the wireless station 310 and a wireless base station 320 by a network management console nmc 340 2 the wireless base station 320 is supposed then to export a.