Modeling and simulation for detecting a distributed denial of service attack

The attackers on Internet-connected systems we are seeing today are more serious and technically complex than those in the past. So it is beyond the scope of any one system to deal with the intrusions. This paper shows a modeling and simulation of network security in which the multiple IDSes (Intrusion Detection System) and a firewall coordinate by sharing attacker's information for the effective detection of the intrusion. Another characteristic in the proposed simulation is the composition of a real intrusion by generating non-abstracted intrusion packets and, accordingly, the construction of non-abstracted version of IDS and firewall model components.