Microsoft mitigated a record 3.47 Tbps DDoS attack on Azure users

Microsoft says its Azure DDoS protection platform mitigated a massive 3.47 terabits per second (Tbps) distributed denial of service (DDoS) attack targeting an Azure customer from Asia in November. Two more large size attacks followed this in December, also targeting Asian Azure customers, a 3.25 Tbps UDP attack on ports 80 and 443 and a 2.55 Tbps UDP flood on port 443.

“In November, Microsoft mitigated a DDoS attack with a throughput of 3.47 Tbps and a packet rate of 340 million packets per second (PPS), targeting an Azure customer in Asia. We believe this to be the largest attack ever reported in history,” said Alethea Toh, an Azure Networking Product Manager.

“This was a distributed attack originating from approximately 10,000 sources and from multiple countries across the globe, including the United States, China, South Korea, Russia, Thailand, India, Vietnam, Iran, Indonesia, and Taiwan.”