DDoS attack trends in the first quarter of 2021 defied norms in many ways. This report comprises DDoS insights and trends that are based on attacks that Cloudflare’s systems mitigated during 2021 Q1. Below are noteworthy observations from the report:

Application-layer DDoS attacks

• Most of the HTTP attack traffic originated from China. Following closely was the US. The next runner ups were Malaysia, India, Brazil and Germany.
• The top three attacked industries included Telecommunications, Consumer Services, and Security and Investigations.
• The most attacked Internet properties were of companies based in China, the US, and Morocco.

Network-layer DDoS attacks

• On the Cloudflare network, the highest DDoS activity was observed in data centers in Rwanda, China, and Brunei.
• Almost 44% of all of the attacks in Q1 occurred in January.
• Top emerging threats include attacks targeting Jenkins and TeamSpeak3 servers, which increased by 940% and 203% QoQ, respectively.

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