https://www.reuters.com/article/russia-yandex-cyber/russias-yandex-says-it-repelled-biggest-ddos-attack-in-history-idUSKBN2G50ZS

A cyber attack on Russian tech giant Yandex's servers in August and September was the largest known distributed denial-of-service (DDoS) attack in the history of the internet, the company said on Thursday.