A distributed denial-of-service (DDoS) attack is carried out by simultaneously by compromised systems against targets causing system and service unavailability. Regardless of industry and size, companies worldwide are increasingly becoming target of DDOS attacks. The sophistication and intensity of these attacks are exponentially rising due to increase in number of compromised systems, unpatche...

Current trends in distributed denial of service (DDoS) attacks show variations in terms of attack motivation, planning, infrastructure, and scale. “DDoS-for-Hire” and “DDoS mitigation as a Service” are the two services, which are available to attackers and victims, respectively. In this work, we provide a fundamental difference between a “regular” DDoS attack and an “extreme” DDoS attack. We co...

Millions of people across the globe access Internet-based applications and web services in their day to day activities. Distributed Denial of Service (DDoS) attack is one of the prominent attacks that cripple down the computing and communication resources of a web server hosting these services and applications. The situation turns further crucial when DDoS attacks are launch during similar look...

The minimal processing and best-e↵ort forwarding of any packet, malicious or not, was the prime concern when the Internet was designed. This architecture creates an unregulated network path, which can be exploited by any cyber attacker motivated by revenge, prestige, politics or money. Denial-of-service (DoS) attacks exploit this to target critical Web services [1, 2, 3, 4, 5]. This type of att...

We describe a defense system to contain Distributed Denial-of-Service (DDoS) flooding attacks in highspeed networks. We aim at protecting TCP friendly traffic, which forms a large portion of Internet traffic. DDoS flooding attacks tend to establish large numbers of malicious traffic flows to congest network. These flows are marked as TCP flows, and use spoofed source identifiers to hide their i...

Distributed Denial of Service (DDoS) attack is one of the greatest threats to connectivity, continuity, and availability of the Internet. In this paper, two typical types of DDoS attacks, high-rate (Flood) and low-rate (Shrew), are studied on their generation principles, mechanism utilizations, behaviors, signatures, and attack performances. Experiment results show that: (I) high-rate DDoS send...

Spoofing source IP addresses is always utilized to perform Distributed Denial-of-Service (DDoS) attacks. Most of current detection and prevention methods against DDoS ignore the innocent side, whose IP is utilized as the spoofed IP by the attacker. In this paper, a novel method has been proposed to against the direct DDoS attacks, which consists of two components: the client detector and the se...

The paper considers an approach to modeling and simulation of Distributed Denial of Service (DDoS) attacks fulfilled by a group of malefactors. The approach is based on combination of “joint intentions” and “common plans” theories as well as state machines. The formal framework for modeling and simulation of DDoS) attacks is presented. The architecture and user interfaces of the Attack Simulato...

In various network attacks, the Distributed Denial-of-Service DDoS attack is a severe threat. In order to deal with this kind of attack in time, it is necessary to establish a special type of defense system to change strategy dynamically against attacks. In this paper, we introduce an adaptive approach, which is used for defending against DDoS attacks, based on normal traffic analysis. The appr...