Denial–Of-Service (DOS) attacks are detected on network layer which are namely as gray hole attack, black hole attack and worm hole attack. We have surveyed research papers based on detection of gray hole attack in MANET. This survey paper analyze the gray hole attack detection technique on AODV routing protocol. | ISSN:2249-5789 Nirali Modi et al , International Journal of Computer Science & Communication Networks,Vol 4(1),09-12 A Survey Paper On Detection Of Gray-Hole Attack in MANET 1 Nirali Modi1, Vinit Kumar Gupta2, Indr jeet Rajput3 Hasmukh Goswami College of Engineering, Ahmedabad, India modinirali7@ 2 Hasmukh Goswami College of Engineering, Ahmedabad, India guptasvnit@ 3 Hasmukh Goswami College of Engineering, Ahmedabad, India Abstract-MANET is a wireless ad hoc network, decentralized network and autonomous system. Mobile ad hoc network is created by mobile nodes. To forward the packet, each node in MANET acts as router. That is free to moving in and out in the network. There are some constraints like limited resources, self – configuration ability, power consumption ratio and security. Among them security is the most challenging job in MANET to maintain the networks performance. There are different types of attacks detected in MANET. Denial–Of-Service (DOS) attacks are detected on network layer which are namely as gray hole attack, black hole attack and worm hole attack. We have surveyed research papers based on detection of gray hole attack in MANET. This survey paper analyze the gray hole attack detection technique on AODV routing protocol. Gray hole attack detects on the network layer. It can be act as slow poison. It is the variation of black hole attack. In gray hole attack malicious node either drop packets selectively or Refuse to forward packets and drop them (. dropping 50% of packet or dropping with some probability or forward all TCP packets while dropping all UDP packets). Malicious node some Keywords—MANET, gray hole, AODV, RREQ, RREP I. INTRODUCTION Most important concern for network is security in mobile ad hoc network. It is highly adaptable and deployable network. It is a self- configuring infrastructure less network of mobile devices connected by wireless. Radio communication is used by mobile .
