Abstract: Wireless Local Area Network (W-LAN) security has signified incredible favorable advantages in numerous fields, with adaptable and straightforward access, W-LAN system administration has an extensive variety of requisition. This project involves the implementation of a network with more security by using measures which will disable access for unauthorized users to the network. The goal is to rise W-LAN security by introducing a W-LAN management system which can prevent the intruders who are try to access the system for steal the data. For this security process system going to detect the intruders and categorize them by using the algorithm and using data mining techniques, after categorizing system check activities of that devices and if the system feel that the activities are harm then it will block the device permanently from that network system. Although considerable debate exists regarding the risks and benefits of building a W-LAN it is possible to reduce unauthorized access to the system by making use of the existing technologies while building protocols to add more. Spoofing, Eavesdropping, phishing and other methods of accessing the network can be eliminated by this particular system.