Network intrusion detection technique for regular expression detection using dpi in AD-HOC wireless network

Deep Packet Inspection (DPI) is more widely used in all applications or services such as Intrusion Detection System (IDS), which used with or within a network. DPI investigates all data present in the packet as it goes through an inspection to determine the transported application and protocol. Deep packet inspection mostly uses regular expression matching as a main operator. Regular expressions (RegExes) are used to represent complex string patterns flexibly in many applications varying from network intrusion detection and prevention systems (NIDPSs). Regular expressions represent complex string pattern as signatures of attack in DPI. It analyze whether a packet’s payload similar to any of a set of predefined regular expressions. There are various techniques implemented in DPI for deep packet inspection for regular expression. We survey on these DPI techniques for further improvement in detection of regular expression in this paper. We implement technique to block regexp packet such as DOS attack and SQL injection attack. In the result we found that it is possible to reduce RegExp transaction memory required to detection in network intrusion detection. We implement this technique with possible use of DPI techniques in the ad-hoc wireless network