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Denial of service attacks case study
Essay on denial of service attacks
Denial of service attacks case study
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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) On March 27, 2015, GitHub was hit with a massive denial of service
A dictionary attack is a technique used to break the computer security of a password-protected machine or server by systematically entering each word in dictionary as a password. A brute force attack is a trial-and-error method used to obtain secret information such passwords.
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.
Network modification is one of the action to be considered when DDoS attack occurs. In this situation incident response team could switch to different network by using domain name system (DNS). IP address are translated through DNS by their domain name and DNS and DNS responsibility is to allow the user to securely browse into any websites. Also, DNS allows to send and receive emails through any web browsers in any website. Incident team should distribute the attack traffic across the network of data center so it will delay the DDoS attack in spreading into other networks. At last, traffic should be sent to high capacity networks so it can go through scrubbing services.
Denial of Service(DOS) : It is an attack which makes the attacked machine busy such that it is not able to serve legitimate client (eg apache, smurf, neptune, ping to death etc).
Network Security is the protection of the computer’s network though out the entire infrastructure. It can protect very important information and computer files to help prevent theft, spyware, malware, viruses, and more. Depending on if you have a public or private network, can determine what type of security settings you need for your network. All people are different on what they want to have secured or not, but most people do not know how to prevent people or things from getting in their network. “You must have a general understanding of security terminology and specifications as it relates to configuring hardware and software systems.”(Roberts, Richard M. 599). That quote states that by knowing and understanding security terms and specifics, you can
There are more Web application vulnerabilities than one can even count, and they have become so widespread that most hacking sites have tools that you can download to search, find, and exploit tools these vulnerabilities. This makes it very easy for even a rookie hacker to exploit these flaws. The three common web application vulnerabilities and attacks are as follows: Username enumeration, Security misconfiguration, and SQL Injection.
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...
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)
Ubuntu is the most well known free distribution (distro) of Linux (Ubuntu Manual Team, 2013). One of the main ideas behind most Linux distros is that the community is able to improve the operating system (OS) whether that person is a user or developer. Both users and developers are able to submit bug reports to help the community collaborate with each other and enhance the OS. Any person with the necessary skills and tools can also develop for the operating system, and submit a pull request, a process which allows developers to contribute their own code to the operating system. Many Linux distros, including Ubuntu, have package managers which allow users to easily customize their computer and its software to their specific needs.
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.
DOS (Disk Operating System) . (n.d.). In DOS History. Retrieved January 14, 2012, from http://www.fortunecity.com/marina/reach/435/dos.htm
Without proper protection, any part of any network can be susceptible to attacks or unauthorized activity. Routers, switches, and hosts can all be violated by professional hackers, company competitors. In fact, according to several studies, more than half of all network attacks are waged internally. To determine the best ways to protect against attacks, we should understand the many types of attacks that can be instigated and the damage that these attacks can cause to data. The most common types of attacks include Denial of Service (DoS), password, an...
One particular crime that could be committed by employees who use the internet at work is hacking. Hacking is one of the most well-known types of computer crimes, in this context, the term refers to the unauthorized access of another’s computer system (HG.org Staff, 2015). This means that if the employee in not allowed to use the internet, for personal use, than there is a possibility that they could get charged for such crime. Because the policy will state they do not have the authority to access the organizations computer system for personal use. In addition, they must know that all use of computers systems while at work will be monitor, including e-mails. Piracy and cyber terrorism are other crimes that one can face when using a computer
Black hat: Black hat are the "hackers" which means they intentionally sent a malicious code into the computer system or network. black hat hackers are violate the rules of computer security. black hat hackers hack the system without authorization and destroy files or steal data for their purposes. black hat hackers will destroy secure network which is unusable access to user as a result authorize will get a downtime access of network.
One of the main types of networking operating systems is the peer to peer type such as Appleshare or workgroups. Also, another main type is for the client-server..