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In Mobile Ad hoc Networks (MANET), various types of Denial of Service Attacks (DoS) are possible because of the inherent limitations of its routing protocols. Considering the Ad hoc On Demand Vector (AODV) routing protocol as the base protocol it is possible to find a suitable solution to overcome the malicious flooding i.e. attack of initiating / forwarding Route Requests (RREQs) that lead to hogging of network resources and packet dropping is a technique in which a node drops data packets (conditionally or randomly) that it is supposed to forward hence denial of service to genuine nodes. In this paper, a technique is proposed that can prevent a specific kind of DoS attack i.e. flood attack which Disable IP Broadcast. The proposed scheme is distributed in nature it has the capability to prevent Distributed DoS (DDoS) attack. The performance of the proposed algorithm in a series of simulations reveals that the proposed scheme provides a better solution than existing approaches.

The Zone Routing Protocol is a protocol which employs both the activities of proactive and reactive protocols. It is mainly designed for Mobile Adhoc Networks. The transfer of data inside the routing zone is handled by proactive part of ZRP i.e IARP and outside the routing Zone is done by the reactive part i.e IERP. In this work, an analysis has been done by setting up two different simulation environments for ZRP. First is by varying the Zone Radius and another one is by varying the node density for various zone radius. This will help us in analyzing the performance of zone routing protocol in highly dynamic environment.