AWS CloudTrail introduces dual stack support for the CloudTrail API endpoints, enabling you to connect using Internet Protocol Version 6 (IPv6), Internet Protocol Version 4 (IPv4), or dual stack clients. Dual stack support is also available when you privately access the CloudTrail API endpoint from your Amazon Virtual Private Cloud (VPC) using AWS PrivateLink.
The urgency to transition to Internet Protocol version 6 (IPv6) is driven by the continued growth of internet, which is exhausting available Internet Protocol version 4 (IPv4) addresses. With simultaneous support for both IPv4 and IPv6 clients on CloudTrail endpoints, you are able to gradually transition from IPv4 to IPv6 based systems and applications, without needing to switch all over at once. This enables you to meet IPv6 compliance requirements and removes the need for expensive networking equipment to handle the address translation between IPv4 and IPv6
To learn more on best practices for configuring IPv6 in your environment, visit the whitepaper on IPv6 in AWS. Support for IPv6 on AWS CloudTrail is available in all commercial regions and the AWS GovCloud (US) Regions.
Source:: Amazon AWS