AWS Shield Advanced now supports proactive response to events
AWS Shield Advanced now allows proactive engagement from the DDoS Response Team (DRT) when a DDoS event is detected. When you turn on proactive engagement, the DRT will directly contact you if an Amazon Route 53 health check associated with your protected resource becomes unhealthy during an event that’s detected by Shield Advanced. This allows you to engage with experts more quickly when the availability of your application might be affected by a suspected attack. You can apply proactive engagement to all resource types that Shield Advanced supports: Elastic IP, Elastic Load Balancing (ELB), Amazon CloudFront, AWS Global Accelerator, or Amazon Route 53.
Source:: Amazon AWS