DDoS defense scheme using collaboration of client and servers

To defend against the distributed denial of service(DDoS) attack,a special DDoS defense scheme using the collaboration of puppet machine and servers is proposed.For the connectionless oriented attack,the active detection and defense is mainly conducted on puppet-side.For the connection oriented attack,the technology of SYN Cookie using the collaboration of client and servers is applied.So it can defend against the DDoS attack effectively and initiatively.Simulation results validate the effectiveness of the said scheme.