Introduction
Denial of service (DoS) and distributed DoS (DDoS) attack is a means to take control of a computer terminal or network resources to disrupt communications of a computer host with a connection to the Internet. A DDoS is an attack sent by more than two computer hosts or a coopted zombie computers in a botnet and DoS is an attack by one computer host. Either attack will flood an online computer or network with of incoming messages to overwhelm the targeted system thus denying service to the internet or communication with authorized users (US-CERT, 2013).
Often DDoS attacks are employed by a overloading an internet service by using up bandwidth on the application-layer and cause services to cease service by inundation of packet to the data base with application calls (US-CERT, 2013). Also an attack can be accomplished by resource flooding where an attacker(s) consumes a target network or computer resources. CPU, hard disk to degrade the equipment communication to put it in a state unavailable for legitimate users. This means of resource flooding can place into two types, malformed packet attack or a Protocol exploit attack (Keromytis et al., n.d).
Keep in mind a DoS or DDoS attack often has many victims in both the unaware compromised systems and the target network both suffer severely degraded services. It is important to note that network server requires a minimal amount of network bandwidth to function that is often disrupted and denied during DoS or DDoS activity (UMUC, 2013).
History documents the first DoS-style attack was executed by a 15 year boy aka “mafiaboy.” In February 7, 2000, the Canadian youth carried out a series of DoS attacks toward Amazon.com and eBay.com. His attacks brought a great percentage ...
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...MUC (2013) Interactive Case Study Module 4.Monitoring, Auditing, Intrusion Detection, Intrusion Prevention, and Penetration Testing CSEC 640.
US-CERT (2013) Security Tip (ST04-015) Understanding Denial-of-Service Attacks. Retrieved from http://www.us-cert.gov/ncas/tips/ST04-015
Zade A,Patil S & Salunke D (2011) A Novel Technique for Detection and Prevention of Distributed Denial of Service Attack. Advances in Computational Sciences and Technology. ISSN 0973-6107 Volume 4 Number 2 (2011) pp. 221-225. Retrieved from http://www.ripublication.com/acst.htm
Wang X, Chellappan S, Boyer P & Xuan D (2006)On the Effectiveness of Secure Overlay Forwarding Systems under Intelligent Distributed DoS Attacks. IEEE transactions on Parallel and Distributed systems, vol. 17, no. 7, July 2006. Retrieved from http://www.computer.org.ezproxy.umuc.edu/csdl/trans/td/2006/07/l0619.pdf
...a flood of packets. Therefore, the victim node or sometimes the whole network can get easily paralyzed [24].
The Aim Higher College’s system administrators and network engineers have described seeing some strange behaviors such as high levels of traffic from many hosts that are causing system outages. The web servers of the college have been shutting down frequently by this traffic, it must be from a hacker group trying to attack the school with malicious software. I will review the network traffic from the college’s intrusion detection system and use an intrusion prevention system to block off these threats from the hackers.
”Attacks implemented by cyber terrorists via information systems to (1) significantly interfere with the political, social or economic functioning of a critically important group or organization of a nation, or (2) induce physical violence and/or create panic. We define hackers as individuals who (1) wish to access/modify data, files, and resources without having the necessary authorization to do so, and/or (2) wish to block services to authorized users. Cyber terrorists are individuals or groups who utilize computing and networking technologies to terrorize. In this paper, we study the behaviors of two groups of hackers: cyber terrorists and common hackers" (Hua & Bapna 2013).
It seems that DOS attacks and other forms of cyber attacks are not under Computer misuse Act legislation ( misinformation and ignorance from many sources such as some webs of IT security specialists) but after consultation with an international law firm that doubt was resolved,and Compuer Misuse Act encompasses a wide range of activities including DOS attacks.
"Computer Security Training, Network Research & Resources." SANS: Computer Security Training, Network Security Research, InfoSec Resources. Web. 17 Mar. 2011. .
The Denial of Service attack (DoS), in this attack, the attacker does not actually access the system, but rather simply blocks access from legitimate users. In the words of the CERT (Computer Emergency Response Team) Coordination Center (the first computer security incident response team), “A ‘Denial-of-Service’ attack is characterized by an explicit attempt by attackers to prevent legitimate users of a service from using that service” (CERT, 2003). One often-used blocking method is flooding the targeted system with so many false connection requests that it cannot respond to legitimate requests. DoS is an extremely common attack method, second only to malware. (Easttom, 2014)
Waterman, Shaun. "Obama Hits Pause on U.S. Action in Face of Crippling Cyber Strikes from Syria, Iran." Washington Times 28 Aug. 2013. Print. (Source B)
In 1980, James Anderson’s paper, Computer Security Threat Monitoring and Surveillance, bore the notion of intrusion detection. Through government funding and serious corporate interest allowed for intrusion detection systems(IDS) to develope into their current state. So what exactly is IDS? An IDS is used to detect malicious network traffic and computer usage through attack signatures. The IDS watches for attacks not only from incoming internet traffic but also for attacks that originate in the system. When a potential attack is detected the IDS logs the information and sends an alert to the console. How the alert is detected and handled at is dependent on the type of IDS in place. Through this paper we will discuss the different types of IDS and how they detect and handle the alerts, the difference between a passive and a reactive system and some general IDS intrusion invasion techniques.
2. How vulnerable is your company to a denial of service (DoS) attack or intrusion? What should be done about such vulnerabilities?
...r intrusion detection.”, Systems, Applications and Technology Conference, 2006. LISAT 2006. IEEE Long Island pp.1-8.
The ability of the attackers to rapidly gain control of vast number of Internet hosts poses an immense threat to the overall security of the Internet (Staniford, Paxson & Weaver, 2002). Once compromised, these hosts can not only be used for massive Distributed Denial of Service (DDoS) attacks, but also steal or corrupt great quantities of sensitive information by confusing and disrupting the network in more subtle ways (Honeynet, 2005).
Gibson, D. (2012, January). SSCP systems security certified practitioner Exam Guide: all in one. (p. 146).New York: McGraw – Hill.
attempt to force a network offline and unavailable to its intended users. This process is typically performed by flooding a network with communication requests until the server cannot respond to the traffic, thus making the server go offline and become available. This process is relatively simple to perform to the average person through online programs. Since it is so easy perform, it has become a rising issue simply because anyone has the ability to hack into various servers. One example in recent news of DDoS attacks comes from Riot Games, developer of the popular online multiplayer video game League of Legends. After a month of inconsistency with their server stability and frequent shut downs, Riot Games reported that within the l...
Prefix Hijacking: This occurs when the attack router creates a route to an existing IP prefix of the victim network. This results in the Internet being partially polluted, depending on how preferable the fake route is compared to the real route from the view point of various networks.
Abstract─Distantly controlled and managed (by botmaster or botherder) malicious software (called botnets or ‘bot armies’) hidden in large number of computers may cause extraordinary likely damage to the Internet. Botnets can initiate massive coordinated attacks upon Internet resources and its infrastructure devices. The most likely potential uses of botnets are distributed denial of service (DDoS) attacks, spamming, sniffing traffic, keylogging, installing advertisement addons and google adsense abuse, attacking internet relay chat (IRC) networks, attacking peer-to-peer (P2P) networks, hypertext transport protocol (HTTP) networks, and mass identity theft etc. This research is intended to review and analyze all aspects of well known botnets applications like IRC, P2P, HTTP and miscellaneous category. The study will focus on botnets measuring techniques, botnet behaviour, DDoS technology, botnet modeling, complexity of botnet software, setting up an IRC honeypot on network, and different botnets mitigation techniques and defense approaches against botnets etc. Mainly bots go unnoticed unless the botmaster makes a mistake. Presently, wide-ranging efficient defensive technologies are lacking. As botmasters carry on to improve their capabilities, awareness will be essential in enhancing bot defenses.