If you try to connect from your laptop or PC to your EC2 instance by using IPv6
• Your subnet must be associated with a route table that has a route for IPv6 traffic (::/0) to an internet gateway.
• Your security group rules must allow inbound traffic from your local IPv6 address on the proper port (22 for Linux and 3389 for Windows).
• Your network ACL rules must allow inbound and outbound IPv6 traffic.
• If you launched your instance from an older AMI, it may not be configured for DHCPv6 (IPv6 addresses are not automatically recognized on the network interface).
• Your local computer must have an IPv6 address, and must be configured to use IPv6.
• Your subnet must be associated with a route table that has a route for IPv6 traffic (::/0) to an internet gateway.
• Your security group rules must allow inbound traffic from your local IPv6 address on the proper port (22 for Linux and 3389 for Windows).
• Your network ACL rules must allow inbound and outbound IPv6 traffic.
• If you launched your instance from an older AMI, it may not be configured for DHCPv6 (IPv6 addresses are not automatically recognized on the network interface).
• Your local computer must have an IPv6 address, and must be configured to use IPv6.
