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What is DDoS?

Distributed Denial of Service (DDoS) attacks account for about one-third of all web server downtime. They disrupt businesses, government departments, other kinds of organisation and even individuals on a daily basis, often causing huge financial and personal loss for those who are the target of such attacks. DDoS attacks are implemented when individuals or syndicates use multiple systems to flood the resources of targeted servers or the networks to which they are connected. In this way, legitimate traffic is denied access to the service provided by these servers.

Banks, financial institutions, telecom operators and online gaming companies have been amongst the high profile targets in recent years. In some case attacks are simply mischeivous. Others are instigated by criminal groups in order to extort money from vulnerable organisations. For example, if access to an online gambling service web server is blocked, the company generates no revenue from that server until the attack stops or is mitigated be preventative measures that do not compromise legitimate traffic.

The source of a DDoS attack is difficult to identify because mutliple computers are used to implement it. Numerous system compromisers are employed, collectively known as botnets.

RedSpam DDoS Protection Emergency Telephone Number

Attack mitigation techniques can include simple, but expensive, over-provisioning of bandwidth, so that there is always capacity for legitimate traffic, and filtering, so that server requests from IP addresses that are known to be used for DDoS attacks are blocked. However, the complexity and size of recent attacks, some reaching as much as 100Gbps in size, now demands mitigation techniques of ever-greater sophistication to be employed.