Distributed denial of service attacks represents one of the most important threats to cloud-providers. Over the years, volumetric DDoS attacks have become increasingly important and complex. Due to the rapid adaptation of attackers to the detection and mitigation methods designed to counter them, the industry needs to constantly monitor and analyse the attacks they face. In this paper, we present an overview of the attacks that were perpetrated against our infrastructure in 2021. Our motivation is to give an insight of the challenge that DDoS attacks still represent within a large European cloud provider

翻译：多年来,量体DDoS攻击变得越来越重要和复杂。由于攻击者迅速适应了旨在对付这些攻击的探测和缓解方法,该行业需要不断监测和分析他们所面临的攻击。在本文件中,我们概述了2021年对我们基础设施的袭击。我们的动机是深入了解DDoS攻击在欧洲大型云供应者中仍然构成的挑战。