Microsoft: Here's how we stopped the biggest ever DDoS attack

Microsoft has revealed that it stopped what it described as the largest distributed denial of service (DDoS) attack ever reported in history in November, which at 3.47 terabytes (Tbps) per second outsized a mega 2.4 Tbps DDoS it thwarted last year that was then thought to be the largest DDoS in history. 

DDoS attacks harness the connectivity of many compromised devices and direct packets of data at a specific target, such as a website or internet service, with the aim of knocking it offline.  

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Massive DDoS attacks measured in Tbps are becoming more common. According to Alethea Toh, a product manager on the Microsoft Azure networking team, Microsoft stopped two other DDoS attacks that exceeded 2.5 Tbps in December. 

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The record-breaking 3.47 Tbps DDoS attack originated from approximately 10,000 sources from connected devices in the United States, China, South Korea, Russia, Thailand, India, Vietnam, Iran, Indonesia, and Taiwan. “We believe this to be the largest attack ever reported in history,” said Toh.

The largest attacks last year used the User Datagram Protocol (UDP), while attacks focusing on gaming servers were carried out using variants of the Mirai

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