https://www.bleepingcomputer.com/news/security/imperva-mitigated-long-lasting-253-billion-request-ddos-attack/

Internet security company Imperva has announced its DDoS (distributed denial of service) mitigation solution has broken a new record, defending against a single attack that sent over 25.3 billion requests to one of its customers.

The target was a Chinese telecommunications service provider often at the receiving end of DDoS attacks with unusually large volumes.