Starting today, Amazon EC2 Instance Connect now supports Internet Protocol Version 6(IPv6). Customers moving to IPv6 can now connect to their instances with a single click or command using EC2 Instance Connect over IPv6.
Amazon EC2 Instance Connect provides a single-click and single command Secure shell(SSH) based connectivity to instances. Until today, EC2 Instance Connect, only supported connectivity over IPv4. With this launch, EC2 Instance Connect now supports SSH to instances over both IPv6 and IPv4. Customers can additionally use prefix lists to configure and maintain their security group rules to allow SSH traffic.
EC2 Instance Connect is available at no additional cost. Visit our documentation page for more information about connecting to Linux instances using EC2 Instance Connect from API, CLI, or the Amazon EC2 console.
Source:: Amazon AWS