DEFENSE FRAMEWORK (STREAM) FOR STREAM-BASED DDoS ATTACKS ON MANET

MANET are usually characterized by limited resources such as bandwidth, battery power, storage space and node mobility. The underlying assumption is that the intermediate nodes cooperate in forwarding packets. Due to lack of infrastructure, the network can be easily affected by several attacks. The security challenges in MANET have become a primary concern to provide secure communication. The Attacks on MANET disrupts network performance and reliability. Nowadays, DoS attacks are usually launched in a distributed way: known as DDoS attacks i.e. the attacks where traffic originates from many attacking sources and the aggregated traffic volume is so big that it can easily deplete the victim's key computing resources, such as bandwidth and CPU time. These attacks lead toward the degradation or prevention of legitimate use of network resources. Preventing or mitigating DDoS attacks is not an easy job .In this paper we develop the mechanism to deal with a stream-based DDoS defense framework (STREAM) that provides: Protection against different types of DDoS attacks (such as bandwidth flooding attacks and SYN flooding attacks) which are efficient against on-line DDoS detection providing filtering of illegitimate traffic.