DDoS Attack Trends for Q4 2021

What this post added

This post details the DDoS attack trends observed on the Cloudflare network during Q4 2021 and the full year. It highlights the increase in ransom DDoS attacks, application-layer DDoS attacks (particularly against the Manufacturing industry), and network-layer DDoS attacks, including terabit-strong attacks. It also identifies key attack origins (China for application-layer, Moldova for network-layer) and common attack vectors (SYN floods, UDP floods). The post also mentions the emergence of the Meris botnet and the impact of the Log4j2 vulnerability.