A distributed denial-of-service attack overwhelms a public-facing application or Azure resource with traffic from multiple sources, disrupting availability and potentially causing lost revenue, reputational damage, recovery costs, and unexpected autoscaling charges. section 3.4
Azure DDoS Protection mitigates the attack at public IP entry points by:
- Establishing thresholds for inbound SYN, TCP, and UDP traffic above usual observed levels. section 3.4.1
- Analyzing traffic properties at the network and transport layers with proprietary detection and mitigation techniques. section 3.4.1
- Dropping traffic identified as malicious while continuing to inspect legitimate increases, such as seasonal demand. section 3.4.1
- Offering Basic protection at no additional cost, built into Azure without setup, alongside a Standard SKU. section 3.4.1
Online ordering application
An attack against an Azure shopping application can make ordering unavailable and trigger autoscaling in Application Gateway v2 or Virtual Machine Scale Sets. Azure DDoS Protection helps distinguish malicious traffic from legitimate customer surges. section 3.4 section 3.4.1


