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Abstract

In the 21st century, information and communication technology is arising at a very high speed. Everyone wants to be interconnected 24/7 with each other. So mobility came to into existence in the form of MANETs that becomes integral part of everyone's life. By providing communications in the absence of a fixed infrastructure MANETs are an attractive technology for many applications such as resource application, military application, environmental monitoring and conferences. A Mobile ad hoc network continuously changes its topology i.e. self-configuring network of mobile nodes connected with the wireless network and each node changes its direction very frequently, which leads to change networks topology very fast. A mobile ad hoc network is a self-configuring structure. Each device in MANET is authorised to travel on any route and in any directions. The mobile nature of nodes will create many security issues in MANET. Thus, securing such demanding network is a big challenge. At this point, IDS came into existence to secure MANET in detecting at what point they are getting weak. In this review paper, we will discuss, MANET and its vulnerabilities, IDS (Intrusion Detection System). An intrusion is an unauthorised or illegal access of network by the intruder. Intruder is a person who interrupts the network with some malicious intent or criminal intentions. The intrusion detection is a system that continuously monitors the network or packet inflow and outflow in the network. It checks and detects the malicious node and any misuse of the network resources. We review several vulnerabilities for Manet.

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