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Network Security Research paper

Distributed Denial of Service (DDoS) Attacks which can be so powerful that they can easily deplete the computing resources or bandwidth of the potential targets. DDoS attacks can be accosted in two levels: application-level and network-level. The weak point in network-based application is that the communication port is commonly open. This allows attackers to possibly launch Denial of Service (Dos) Attacks. Solutions to this problem; we use port hopping technique to support many clients without the need of group synchronization in the presence of clock drift. Furthermore we use HOPERAA algorithm and BIGWHEEL algorithm to overcome distributed denial of service attacks.

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IEEE Transactions on Dependable and Secure Computing, 2012

A weak point in network-based applications is that they commonly open some known communication port(s), making themselves targets for denial of service (DoS) attacks. Considering adversaries that can eavesdrop and launch directed DoS attacks to the applications' open ports, solutions based on pseudo-random port-hopping have been suggested. As port-hopping needs that the communicating parties hop in a synchronized manner, these solutions suggest acknowledgment-based protocols between a client-server pair or assume the presence of synchronized clocks. Acknowledgments, if lost, can cause a port to be open for a longer time and thus be vulnerable to DoS attacks; Time servers for synchronizing clocks can become targets to DoS attack themselves.

A Denial of Service (DoS) attack is a malicious effort to keep endorsed users of a website or web service from accessing it, or limiting their ability to do so. A Distributed Denial of Service (DDoS) attack is a type of DoS attack in which many computers are used to cripple a web page, website or webbased service. Fault either in users’ implementation of a network or in the standard specification of protocols has resulted in gaps that allow various kinds of network attack to be launched of the type of network attacks, denial-of-service flood attacks have reason the most severe impact. This analysis study on flood attacks and Flash Crowd their improvement, classifying such attacks as either high-rate flood or low-rate flood. Finally, the attacks are appraised against principle related to their characteristics, technique and collision. In the modern computer world, maintaining the information is very difficult. Some interrupts may occur on the local system (attack) or network based sy...

A denial of service attack (DOS) is any type of attack on a networking structure to disable a server from servicing its clients. Attacks range from sending millions of requests to a server in an attempt to slow it down, flooding a server with large packets of invalid data, to sending requests with an invalid or spoofed IP address. In this paper we show the comparative analysis of various types of attacks: namely Ping of Death, Connection Flood, TCP SYN Flood, Distributed DOS and others. This paper will demonstrate the potential damage from DOS attacks and analyze the ramifications of the damage. The paper concludes with suggested mitigation methods for some of the discussed attacks.

A denial of service attack (DOS) is any type of attack on a networking structure to disable a server from servicing its clients. Attacks range from sending millions of requests to a server in an attempt to slow it down, flooding a server with large packets of invalid data, to sending requests with an invalid or spoofed IP address.

Distributed Denial of Service (DDoS) Attacks became a massive threat to the Internet. Traditional Architecture of internet is vulnerable to the attacks like DDoS. Attacker primarily acquire his army of Zombies, then that army will be instructed by the Attacker that when to start an attack and on whom the attack should be done. In this paper, different techniques which are used to perform DDoS Attacks, Tools that were used to perform Attacks and Countermeasures in order to detect the attackers and eliminate the Bandwidth Distributed Denial of Service attacks (B-DDoS) are reviewed. DDoS Attacks were done by using various Flooding techniques which are used in DDoS attack. The main purpose of this paper is to design an architecture which can reduce the Bandwidth Distributed Denial of service Attack and make the victim site or server available for the normal users by eliminating the zombie machines. Our Primary focus of this paper is to dispute how normal machines are turning into zombies (Bots), how attack is been initiated, DDoS attack procedure and how an organization can save their server from being a DDoS victim. In order to present this we implemented a simulated environment with Cisco switches, Routers, Firewall, some virtual machines and some Attack tools to display a real DDoS attack. By using Time scheduling, Resource Limiting, System log, Access Control List and some Modular policy Framework we stopped the attack and identified the Attacker (Bot) machines.

International Journal of Engineering Research and Technology (IJERT), 2015

https://www.ijert.org/analysis-of-denial-of-services-dos-attacks-and-prevention-techniques https://www.ijert.org/research/analysis-of-denial-of-services-dos-attacks-and-prevention-techniques-IJERTV4IS070164.pdf In the globalized world, Internet has out grown rapidly as a universal communication network tool, which not only allows sharing information but the entire tasks cooperatively through computing resources. However, over last few decades an illegal acts has numerously increased in the networks and moreover the devious and malicious has increased in their content and among them, especially denial of service (DoS) attacks is identified to be difficult. Thus the present paper aims to explore the DoS flooding attack problem and attempts to combat it with the classifiable countermeasures that prevent, detect, and respond to the DoS flooding attacks. The study adopted the secondary data collection method and data was collected various online and offline sources. The study proposed a cyber-security TCP-SYN is identified to be the effect method to mitigate and block the DDoS attacks and the implementation of these particular cost-effective defense mechanisms against these kinds of attack supports the business continuity to enhance their performance thoroughly. Keywords: Denial of Service (DoS) attacks, Distributed Denial of Service (DDoS) attack, TCP-SYN Flood Attack, TCP-SYN Proxy Protection, Firewall Security I. INTRODUCTION In the globalized world, Internet has out grown rapidly as a universal communication network tool. This Internet infrastructure tools not only allows sharing their information but the entire tasks cooperatively through computing resources contributing [1]. However, over last few decades an illegal acts has numerously increased in the networks and moreover the devious and malicious has increased in their content and among them, especially Denial of Service (DoS) attacks is identified to be difficult. Moreover, and end host can easily join the network and communicate with any other host by exchanging packets. These are encouraging features of the Internet, openness and scalability. However, attackers can also take these advantages to prevent legitimate users of a service from using that service by flooding messages to the corresponding server, which forms a Denial of Service (DoS) attack. A Denial-of-Service (DoS) attack is considered an active attack, which attempts to make a computer or network resource unavailable to its intended users [2]. DoS attacks exhaust the computing or communication resources of the victim"s computer or server.

Denial of Service (DoS) and Distributed Denial Service (DDoS) attacks are a large scale and coordinated attack on availability of a network resource or a victim system. Researchers have come up with more suitable solutions to the DoS and DDoS problems. However, attackers are enriching their capability of DoS attacks and develop the new attacks. This paper lays down the survey of DoS attacks and its different countermeasures that are available in the literature. We discuss and analyze these real time attacks based on the solitude mechanism used, methods, ease of deployment and the network overhead involved. Our onerous survey study presented in this paper provides a platform for the study of evolution of DDoS attacks and their defense mechanisms moreover, a proposed method for avoiding DDoS attacks is also included in this summary.

Handbook of Research on Information Security and Assurance

In this chapter we discuss Distributed Denial of Service (DDoS) attacks in networks such as the Internet, which have become significantly prevalent over the recent years. We explain how DDoS attacks are performed and consider the ideal solution characteristics for defending against the DDoS attacks in the Internet. Then we present different research directions and thoroughly analyse some of the important techniques that have been recently proposed. Our analysis confirms that none of the proposed techniques can efficiently and completely counteract the DDoS attacks. Furthermore, as networks become more complex, they become even more vulnerable to DoS attacks when some of the proposed techniques are deployed in the Internet. The gap between the tools that can generate DDoS attacks and the tools that can detect or prevent DDoS attacks continues to increase. Finally, we briefly outline some best practices that the users are urged to follow to minimise the DoS attacks in the Internet.

IAEME PUBLICATION, 2020

In recent years, Distributed Denial of Service Attack has increased in frequency, complexity, and power. Now DDoS has become a major threat to widely used Internet based services. As became the main cause of the deterioration of services where sometimes completely disabled. DDoS attacks are one of the most important security issues affecting networks and disrupting services for legitimate users. Attackers lunch this type of attack for a variety of reasons and specific targets, either blackmail, information sale, or theft. This paper generally introduces the concept of denial of service attack (DoS). The concept of DDoS attack has been clarified. The DDoS types have been studied with the SYN flood attack being implemented in practice way. In particular, simulate the DDoS attacks and defense against DDoS attacks using Slowloris tool. The DDos attack targeted two things: IP addresses and websites of the victim to flood specific address and flood a website. There are two types of flooding: http with TCP connection and Ping requests.

In computing, a denial-of-service (DoS) or distributed denial-of-service (DDoS)attack is an attempt to make a machine or network resource unavailable to its intended users.DOS attack reduces the efficiency of the server, inorder to increase the efficiency of the server itis necessary to detect the dos attacks. the reliability and security of the Internet not only advantages on-line businesses, but is also an issue for national security. In today's fast growing of internet usage the security of the data, resources and other confidential files are more important aspects. There are so many types of DDoS attacks occurred by attacker on network.DoS causes serious damages to the services running on the victim. Therefore, effective detection of DoS attacks is essential to the protection of online services. Work on DoS attack detection mainly focuses on the development of network-based detection mechanisms. To meet the increasing threats, more advanced defenses are necessary.

Intelligence and National Security, 2018

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