DDoS threat report for 2023 Q4

What this post added

This post details the evolution of DDoS attack trends observed in Q4 2023 and throughout the year. It highlights a significant increase in network-layer DDoS attacks (117% YoY) and a decrease in HTTP DDoS attacks (20% YoY). It also details specific attack patterns related to geopolitical events (Israel-Hamas conflict, Taiwan tensions) and major conferences (COP 28). A key technical contribution discussed is the mitigation of hyper-volumetric DDoS attacks exploiting an HTTP/2 vulnerability, including the largest attack ever seen by Cloudflare (201 million rps). The post also quantifies the volume of mitigated HTTP and network-layer attacks, and analyzes attack targets by industry and region.