> an obscure security group setting that was still set to allow only IPv4 traffic Which setting was that? I've had 0 issues with IPv6 on EC2 for a while now. N

> an obscure security group setting that was still set to allow only IPv4 traffic Which setting was that? I've had 0 issues with IPv6 on EC2 for a while now. Not all services support v6, though, but that's a separate issue.