Efficient Flow Marking IP Traceback System

For controlling the offense on internet the Internet Protocol (IP) traceback technology is used. In this paper we represents a novel and practical IP trace back system, known as Efficient Flow Marking (EFM) for getting IP address of the attacker when IP spoofing technique is used by attacker. The services given by the resources to the justifiable clients Denial of service attack deny that services. The DOS Attacker uses IP spoofing technology for hiding their own uniqueness, for defending against the denial of service attack the first step is to find out IP address of the attacker to take further action. EFM is belongs from the packet marking family of IP trace back scheme. The new characteristics of EFM is that at first it can fix the length of marking field according to the network protocols set up (flexible mark length strategy), second, by observing the load of the participating router by a flexible flow based marking method the proposed method adaptively change its marking rate. This paper focuses on implementation of EFM on network processor.