Designed to lock legitimate users out of Web sites or networks by overwhelming a system with useless traffic so that the computer is not able to respond to any other requests.
An attack that uses high-bandwidth system(s) to overwhelm a system and prevent normal system use
A security attack on a network that floods it with so many requests that regular traffic is either slowed or completely interrupted. It is a deliberate attempt to disable a network. It starts with an innocent PING utility to determine whether a specific IP address is accessible. (See also PING and Smurf attack.)
hackers (or viruses) bombard a website (or other online computer system) with automated requests for data rendering it unable to respond and thus fail.
Often abbreviated as DoS or DOS. An attempt to keep a server or network from performing its intended function, by flooding it with unwanted traffic. For example, an attacker could send tens of thousands of email messages to a mail server to overload it and keep it from processing desired mail. Many different DOS attacks and targets are possible, including attacks on mail servers, web servers, DNS servers and network routers. Spam sent in large volume can act as a DOS attack on mail servers.
a flood of information which swamps Internet equipment and slows traffic down drastically
a flood of requests on a server coming from one or more computers that is designed to slow or stop access to a website(s)
a merciless stream of information sent to a target with the intention of flooding it until it crashes or can no longer take legitimate traffic
an assault on a network that floods it with so many additional requests that regular traffic is either slowed or completely interrupted
an attack against your network availability
an attack in which one user takes up so much of a shared resource that none of the resource is left for other users
an attack on a computer system or network
an attack that is aimed at rendering a website unusable
an attack where one user takes up so much of the shared system resources that there is not enough available for other users
an attack where the attacker renders your system useless, e
an attack with the intent of compromising availability
an attempt by a malicious person or group to bring down your email infrastructure
an attempt by an individual to create more traffic than a system can handle by bombarding it with bogus data
an attempt to attack a machine to stop it working
a simple, but often extremely effective, attack that is difficult, if not impossible, to prevent
An act of sabotage that attempts to flood a network or network server with so much activity that it is unable to function.
Action(s) which prevent any part of a system or network from functioning properly. Denial of Service can result when a system, such as a Web server, has been flooded with illegitimate requests, thus making it impossible to respond to real requests or tasks. Yahoo! and e-Bay were both victims of such attacks in February 2000.
A "denial-of-service" attack is characterized by an explicit attempt by attackers to prevent legitimate users of a service from using that service. Examples include attempts to "flood" a network, thereby preventing legitimate network traffic attempts to disrupt connections between two machines, thereby preventing access to a service attempts to prevent a particular individual from accessing a service attempts to disrupt service to a specific system or person Illegitimate use of resources may also result in denial of service. For example, an intruder may use your anonymous ftp area as a place to store illegal copies of commercial software, consuming disk space and generating network traffic
An attack against a computer or network that attempts to limit or prevent access to the Internet by flooding it with requests (for a webpage or online resource) or email (causing the email system to overload). A more sophisticated variant of this attack is a distributed denial of service attack, which uses multiple computers for this purpose, increasing the amount of traffic and reducing defences of the victim's machine or network.
A user or program takes up all the system resources by launching a multitude of requests, leaving no resources and thereby "denying" service to other users. Typically, denial-of-service attacks are aimed at bandwidth control.
a term used when an attacker attempts to prevent legitimate users from accessing information or services. The most common and obvious type of DoS attack occurs when an attacker “floods†a network with information.
DoS. A hacker attack designed to prevent your computer or network from attack operating or communicating. DHCP See Dynamic Host Configuration Protocol.
Any attack that affects the availability of a service. Reliability bugs that cause a service to crash or go into some sort of vegetative state are usually potential denial-of-service problems.
When a system is deprived of one its services. DoS attacks are often Distributed Denial of Service (DDoS) attacks where multiple compromised computers simultaneously attack a system (such as a web site). The compromised computers use methods such as sending fragmented packets, large packets, or large numbers (floods) of packets, or creating half-open TCP connections to cause the system's performance to degrade, or actually crash the system. Computers are compromised by hackers who use trojans and other methods to circumvent a computer's security controls and gain control over the computer.
A type of hacking attack where the victim computer is flooded with unwanted messages and so prevented from operating properly. To cover their tracks and increase the intensity of DOS attacks, hackers sometimes arrange distributed denial of service attacks where the victim computer is attacked simultaneously by many different computers. To achieve this, hackers co-opt the inadequately protected computers of unwitting owners. Poorly protected domestic PCs connected to high-speed broadband services have been co-opted for this. To prevent this, it is especially important that all computers connected to high-speed broadband services are protected by effective firewalls and anti-virus software.
denial of service attack (DoS) - An attempt by a malicious (or unwitting) user, process, or system to prevent legitimate users from accessing a resource (usually a network service) by exploiting a weakness or design limitation in an information system. Examples of DoS attacks include flooding network connections, filling disk storage, disabling ports, or removing power.
A computerized assault launched by an attacker to overload or halt a network service, such as a Web server or a file server. For example, an attack may cause the server to become so busy attempting to respond that it ignores legitimate requests for connections.
By overloading a service, hackers seek to make it unavailable to legitimate users. For example, by sending millions of spam emails simultaneously to a mail server, ordinary traffic will get clogged up.
The most common form of computer security breach in which an attacker floods a network interface with traffic to make the server so busy it cannot answer requests.
A malicious attempt to prevent legitimate users from accessing a resource (usually an Internet service) by exploiting a weakness or design limitation in an information system. The command program for DoS attacks may be distributed through a virus or other means. A DoS attack may flood network connections with fake communications (like phony e-mails and sign in attempts), fill disk storage, disable network ports, or remove power.
A denial of service (DoS) attack is an incident in which a user or organization is deprived of the services of a resource they would normally expect to have. A denial of service attack can also destroy programming and files in a computer system
Where a hacker sends attachments or other unusual or excessive traffic in an attempt to bring down email systems.
(2004-10-19) Chris Limb Denial of Service (DoS) attack is said to occur when a network is deliberately flooded with traffic with the result that the systems cannot respond normally and service is curtailed or denied.
Where an attacker bombards the target server with so many requests that it cannot respond to legitimate users.
(DoS) A type of attack aimed at making the targeted system or network unusable, often by monopolizing system resources. For example, in February 2000 a hacker directed thousands of requests to eBay's Web site. The network traffic flooded the available Internet connection so that no users could access eBay for a few hours. A distributed denial of service (DDoS) involves many computer systems, possibly hundreds, all sending traffic to a few choice targets. The term "Denial of Service" is also used imprecisely to refer to any outwardly-induced condition that renders a computer unusable, thus "denying service" to its rightful user.
An attack on a network with the purpose of overwhelming the target with spurious data in order to prevent legitimate connection attempts from succeeding. Contrasted to attacks whose purpose is to penetrate the target system, DoS attacks do not reveal sensitive data to the attacker. Examples of DoS attacks are SYN Flood, Tribal Flood Network (TFN), and ping of death.