To Develop TCP Performance in MANETs by Detecting IDSS

A mobile ad hoc network is a network in which a group of mobile computing devices communicate among themselves using wireless radios, without the aid of a fixed networking infrastructure. This paper presents a logical survey on to detect the misbehaving node in Mobile Ad hoc Network (MANET) using Intrusion Detection System (IDS). Mobile ad hoc networks have a different characteristic from wired networks and even from standard wireless networks. A mobile ad hoc network is an infrastructure less network, which is self-configuring mobile nodes connected by wireless links. There are new challenges related to security issues that need to be addressed. In an open MANET, different goals share their resources in order to ensure global connectivity. Mobile ad hoc network is a vulnerable, so that MANET is subject to several attacks ranging from active interfering to passive eavesdropping due to its open medium. Since MANET is being used widespread, security has become a very important issue. The majority of routing protocols that have been proposed for MANET assumes that each node in the network is a peer and not a malicious node. Therefore, only a node that compromises with an attacking node can cause the network to fail. Due to its unique features such as open nature, lack of infrastructure and central management, node mobility and change of dynamic topology, prevention methods from attacks on them are not enough. Most of proposed MANET protocols do not address security issues. Furthermore, Mobile Ad hoc Networks (MANETs) are highly vulnerable for passive and active attacks. The Intrusion Detection is one of the possible ways in recognizing a possible attacks before the system could be penetrated. The encryption and authentication solution, which are considered as the first line of defense, are no longer sufficient to protect MANETs. However, earlier research on cellular wireless systems showed that TCP suffers poor performance in wireless networks because of packet losses and corruption caused by wireless induced errors. Thus, a lot of research has since focused on mechanisms to improve TCP performance in cellular wireless systems Therefore, Intrusion Detection Systems (IDSs) is needed to be the second line of defense to protect the network from security problem. An intrusion detection system is a security system that detects inappropriate or malicious activity on a computer.