Denial of Service (DoS) attacks are a form of attack that seeks to make a network resource unavailable due to overloading the resource or machine with an overwhelming number of packets, thereby crashing or severely slowing the performance of the resource. Distributed Denial of Service (DDoS) is a large scale DoS attack which is distributed in the Internet. Every computer which has access to the Internet can behave as an attacker. Typically bandwidth depletion can be categorized as either a flood or an amplification attack. Flood attacks can be done by generating ICMP packets or UDP packets in which it can utilize stationary or random variable ports. Smurf and Fraggle attacks are used for amplification attacks. DDoS Smurf attacks are an example of an amplification attack where the attacker sends packets to a network amplifier with the return address spoofed to the victim’s IP address. This book presents new research and methodologies along with a proposed algorithm for prevention of DoS attacks that has been written based on cryptographic concepts such as birthday attacks to estimate the rate of attacks generated and passed along the routers. Consequently, attackers would be identified and prohibited from sending spam traffic to the server which can cause DDoS attacks. Due to the prevalence of DoS attacks, there has been a lot of research conducted on how to detect them and prevent them. The authors of this short format title provide their research results on providing an effective solution to DoS attacks, including introduction of the new algorithm that can be implemented in order to deny DoS attacks. A comprehensive study on the basics of network security Provides a wide revision on client puzzle theory An experimental model to mitigate distributed denial of service (DDoS) attacks
Denial of Service (DoS) attacks are a form of attack that seeks to make a network resource unavailable due to overloading the resource or machine with an overwhelming number of packets, thereby crashing or severely slowing the performance of the resource. Distributed Denial of Service (DDoS) is a large scale DoS attack which is distributed in the Internet. Every computer which has access to the Internet can behave as an attacker. Typically bandwidth depletion can be categorized as either a flood or an amplification attack. Flood attacks can be done by generating ICMP packets or UDP packets in which it can utilize stationary or random variable ports. Smurf and Fraggle attacks are used for amplification attacks. DDoS Smurf attacks are an example of an amplification attack where the attacker sends packets to a network amplifier with the return address spoofed to the victim’s IP address. This book presents new research and methodologies along with a proposed algorithm for prevention of DoS attacks that has been written based on cryptographic concepts such as birthday attacks to estimate the rate of attacks generated and passed along the routers. Consequently, attackers would be identified and prohibited from sending spam traffic to the server which can cause DDoS attacks. Due to the prevalence of DoS attacks, there has been a lot of research conducted on how to detect them and prevent them. The authors of this short format title provide their research results on providing an effective solution to DoS attacks, including introduction of the new algorithm that can be implemented in order to deny DoS attacks. A comprehensive study on the basics of network security Provides a wide revision on client puzzle theory An experimental model to mitigate distributed denial of service (DDoS) attacks
Distributed Denial of Service (DDoS) attack is one of the most disruptive attacks in computer networks. It utilizes legitimate requests from hundreds or thousands of computers to specific targets to occupy targets' bandwidth and deplete targets' resource. In this work, we have attempted to not only mitigate DDoS attacks but also identify the source of attacks even behind Network Address Translation (NAT). This is followed by remedial actions such as denying further access or informing them that they have participated in the attacks. This report presents a new algorithm to prevent servers from DDoS attacks. This algorithm requires that network routers or gateways collaborate with each other in order to detect suspicious traffic. The algorithm initiates a peer-to-peer communication among network routers or gateways to increase the probability of detecting unwanted traffic. We derive mathematical proofs based on cryptographic concepts such as birthday attacks to estimate the rate of attacks generated and passed along the routers. This implementation is to prevent the attacker from sending spam traffic to the server which can lead to DDoS attacks. The effectiveness of our implementation is evidenced in our experimental results.
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