International Journal of Computer Applications
Network emulation and simulation tools are widely used for preproduction, studies and researches purposes. This success is due to the quality of result they provide compared to the real equipments. Another advantage of the network simulators is that the cost of studies and experiences are exponentially reduced especially for networks that use expensive hardware or a big number of nodes. In the work done for fighting against Distributed Denial of Service (DDoS) based on Botnet (malicious programs that take the control of many machines on behalf of the owners in order to attack services or send spams), a real time test of the trace-back and counter-attack algorithms is needed.