Measuring the Impact of JellyFish Attack on the Performance of Mobile Ad Hoc Networks using AODV Protocol

MANETs are susceptible to various attacks. Out of which denial of service (DoS) are most dangerous and very difficult to detect and defend. Jellyfish is a new DoS attack categorized as JF Reorder Attack, JF Periodic Dropping Attack, JF Delay Variance Attack. In JF delay variance attack, a JF attacker node intrudes into forwarding group and delays data packets for some amount of time before forwarding. Due to this attack, high endtoend delay is introduced in the network resulting in low performance (i.e. throughput).In this paper the effect of JF Delay Variance attack on MANET using AODV as a routing protocol has been calculated and the performance analysis is done with respect to some network parameters like throughput, endtoend delay etc. using OPNET modeler. It is observed that MANET is resilient up to 10% of JellyFish (JF) attackers. They do not make any hard impact on the performance of network. For attackers above 10% and below 20% performance is affected with an average rate but for 20% or above 20% performance of network becomes worse.