Legitimate chance inspection for identifying legitimate clients under DDoS attacks

Distributed Denial of Service (DDoS) attacks is one among the foremost damaging threats faced by most of the web applications. Variety of helpful mitigation techniques are proposed to discriminate between legitimate and illegitimate traffic. This paper proposes legitimate chance inspection algorithm (LCIA) to protect legitimate traffic from malicious attacks by either drops or detects unwanted packets. This algorithm are going to be used to seek out number of packets being malicious under the legitimate packets in less computational time with Time To Live(TTL) and effectively improve the network performance. Through the intensive simulation experiments on the ns2 network simulator, shows its effectiveness in blocking the attack traffic.