Amazon EC2 gets full IPv6 support - Plusnet Community

Amazon EC2 instance IP addressing - Amazon Elastic Compute When you launch an instance, we allocate a primary private IPv4 address for the instance. Each instance is also given an internal DNS hostname that resolves to the primary private IPv4 address; for example, ip-10-251-50-12.ec2.internal.You can use the internal DNS hostname for communication between instances in the same VPC, but we can't resolve the internal DNS hostname outside of the VPC. Getting started with IPv6 for Amazon VPC - Amazon Virtual For more information about the options available in the Amazon EC2 launch wizard, see Launching an instance in the Amazon EC2 User Guide for Linux Instances. You can connect to your instance through its IPv6 address using SSH or Remote Desktop from your home network. Setup Amazon AWS EC2 with IPv6 Address - Xieles Support

redhat - How do I enable IPv6 in RHEL 7.4 on Amazon EC2

It looks like AWS just doesn't support IPv6 at all (with the exception of ELB, which is irrelevant in this context), and the Alexa services are running on that same infrastructure. Bottom line, make your Alexa service reachable via IPv4 if you want it to work. IPv6 support is available today for all Application Load Balancers in AWS China (Beijing) region, operated by Sinnet and AWS China (Ningxia) region, operated by NWCD. To learn more about IPv6 support with Application Load Balancer, visit here.

Another Nexus 1000V IPv6 FAIL « blog

Setup Amazon AWS EC2 with IPv6 Address. IPv6 is a most recent version of internet protocol. It was indeed to replace the commonly used internet protocol IPv4. In the modern internet world, most of the people are switching their network to IPV6 because of the advantages it provides: Announcing Internet Protocol Version 6 (IPv6) support for Dec 01, 2016