The growing technology of the Wireless LAN (WLAN) 802.11-based it also increases its threat of security attacks. This paper presents an overview and solution of better intrusion prevention system (IPS). We conducted experiments to comprehend the impact of various attacks, study the various probabilities under most dangerous attacks. However the earlier proposed solution to prevent the attacks on WLAN is not efficient. Its challenge to design such a system who gives us better result against the attacks. We propose an hybrid approach for deep packet inspection over network traffic resolve unauthorized, attacker. The experimental results yield satisfactory performance for the hybrid approach.