Abstract: Security is one of the major concerns for protected communication between mobile nodes in a hostile environment. In hostile environments attackers can crew active and passive attacks against intercept able routing in embed in routing message and data packets. In this research, we focus on crucial security attacks in Mobile adhoc networks. MANET has no clear line of deterrence, so, it is accessible to both reasonable network users and malicious attackers. In the existence of malicious nodes, one of the main objections in MANET is to design the robust security solution that can protect MANET from various routing attacks. Yet, these solutions are not suitable for MANET resource constraints, i.e., limited bandwidth and battery power, because they recommend heavy traffic load to exchange and verifying keys. This paper is a study on various security attacks, various mitigation techniques proposed by various Network layers for secure routing and the research on current trends. In particular, we examine routing attacks, as well as remedy against such attacks in existing MANET protocols.

Keywords: Attacks, DSR protocol, MANET, Rushing Attack, Self organization, Router.