The attack/threat on the Sony PlayStation network was a DDoS (Distributed Denial of Service) as it caused the servers to go down,
DoS ,Denial of Service, attacks are one of the most significant problems faced in the internet. There is a pretty simple way to understand the it, for example, there is a restaurant called DoS, there are so many ways for bad guys to stop the restaurant from normal running, such as destroying the cashier making other customer unable to pay, blocking the door making other people unable to get in, kidnapping the chef. Correspondingly, there are thousands of ways for hacker to initiate the DoS attack. There are two major aspect to launch the attack: band width attack and connection attack. the band width attack means hacker will send enormous information packet to the network, making network resource unavailable, so that the service will deny other customers’ request. For the connection attack, hacker will send tremendous connection request to the server, consuming all the system resource, so that the server will unable to receive other customers’ request. In past time, the attacker have to use huge band width to launch the DoS attack, however, it is almost impossible for one person to have it, in order to solve this, the hacker develop some software to control multiple compromised system flooding the targeted system with traffic, which is called DDoS(Distributed Denial of Service). As i mentioned above, there are many ways to launch the attack, such as ping flood(sending the server overwhelming number of ping packets), ping of death(sending the server with malformed ping packet), SYN flood, teardrop attacks, smurf attack, P2P attacks, application level flood.
A “denial of service” attack or DoS attack targets a computer and a network and attempts to prevent a user from accessing information. The victim of the attack may not be able to access bank information, email, or other services. The term “denial of service” is the name of the attack because the attacker floods the server with requests which then “denies” the legitimate user access to the server because the server can only handle a certain amount of requests. (McDowell, 2009). A DoS attack can affect an email account by maximizing the number of emails an account can receive, therefore, denying legitimate emails from being sent to the account. The DoS attack can go a step further and distribute the attack (DDoS) from the victim’s computer onto other networks or computers. The attack takes advantage of the weaknesses of network and sends a surge of information by using more than one computer at the same time. (McDowell, 2009).
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)
In this lab, we used Transmission Control Protocol (TCP) which is a connection oriented protocol, to demonstrate congestion control algorithms. As the name itself describes, these algorithms are used to avoid network congestion. The algorithms were implemented in three different scenarios i.e. No Drop Scenario, Drop_Fast Scenario and Drop_NoFast Scenario.
In the world of computer and network security, there are myriad ways to launch an attack, which, from the perspective of a network, can usually be defined as "traffic that has vicious intent." There are infinite computer attacks that no firewall can prevent, such as those executed locally on the machine by a malicious user. From the network's perspective, there are numerous types of attack. Attacks can be grouped into two types: brute force and precision. Juniper Firewall has the capability to protect against both types of attack. Denial of Service (DoS) attacks are one of the most well-known network security threats under brute force attacks, which is largely due to the high-profile way in which they can affect networks. Over the years, some of the largest, most respected Internet sites have been effectively taken offline by DoS attacks. A DoS attack typically has a singular focus, namely, to cause the services running on a particular host or network to become unavailable. Some DoS attacks exploit vulnerabilities in an operating system and cause it to crash, such as the infamous Winnuke attack. Others submerge a network or device with traffic so that there are no more resources to handle legitimate traffic.Precision attacks typically involve multiple phases and often involves a bit more thought than brute force attacks, all the way from reconnaissance to machine ownership. Before a precision attack is launched, information about the victim needs to be gathered. This information gathering typically takes the form of various types of scans to determine available hosts, networks, and ports. The hosts available on a network can be determined by ping sweeps. The available ports on a machine can be lo...
In September 2004, Authorize.Net's servers were knock by a Distributed Denial of Service (DDoS) show aggression. The DDoS show aggression/attack lasted for more one week and reason a virtual shut down of the payment gateway's service. The aggressor/attacker insisted money from Authorize.net in replace for ended the attack.
Lab 1 demonstrates the capabilities of congestion control algorithms implemented by Transmission Control Protocol (TCP). It provides three scenarios to simulate these algorithms and will later compare the results.
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...
Denial of Service attack occurs when a malicious user attempts to flood a networked computer or device with traffic in order to make the computer or device unavailable, the attack gets its name from its purpose it’s intended to deny the ability of an institution or company to provide service to its users or customers. (University, 2013)