|Project Description: ||A network is an architecture with a lot of scope for attacks. The rise in attacks has been growing rapidly. Denial of Service (DoS) attack and Distributed Denial of Service (DDoS) attack are among the common attacks that are causing disturbances for the network and its corresponding resources. DoS and DDoS, both attacks have significant roles. There are many mechanisms that detect and prevent these attacks. Packet marking schemes are the most successful implementation towards preventing DoS attacks. However, there are some issues with the packet marking schemes, as DoS and DDoS attacks are becoming more sophisticated. Packet marking schemes can traceback the source of attack. In this process the key challenge is to reduce the number of packets that are involved in the traceback of these attacks. The number of packets that are originating from the individual sources are not sufficient to traceback the attackers and thus an efficient packet marking scheme is required in this context.
The main aim of this project is to reduce the number of packets involved across the efficient traceback using Hop-based packet marking technique. The total number of packets involved for a successful traceback of the attacker is at most equal to the hop distance from the attacker to the victim which is equal to 25 [Savage, 2001], [David, 2011]. A simulation is created in this project using Network Simulator 2 (NS2) and the evaluated results prove that Hop-based packet marking technique will reduce the number of packets required for traceback and also detect the DoS/DDoS attacks efficiently.