AWS announces IPv6 support for EC2 Public DNS names

EC2 Public DNS names can now resolve to IPv6 Global Unicast Address (AAAA record) associated with your EC2 instances and Elastic Network Interfaces (ENI). This allows customers to publicly access their IPv6-enabled Amazon EC2 instances over IPv6, using EC2 Public DNS names.

Prior to this, EC2 Public DNS name resolved to the Public IPv4 address (A record) associated with the primary ENI of the instance. So, customers adopting IPv6, used the specific IPv6 address instead of a DNS name to access an IPv6-only Amazon EC2 instance, or used a custom domain by creating a hosted zone using Amazon Route 53. IPv6 support for EC2 Public DNS names allows customers to easily access their IPv6-only Amazon EC2 instances, or formulate a migration plan that allows them to access a dual stack instance via IPv6, with a simple DNS cut over.

This feature is available in all AWS commercial and AWS GovCloud (US) Regions, and customers can set IPv6 support for EC2 Public DNS using the same VPC settings that customers use to enable IPv4-only EC2 Public DNS name today. To learn more about using IPv6 support for EC2 Public DNS name, please refer to our documentation.