TLDR; do xLB support IPv6-to-IPv4 NAT ? Or only forward incoming IPvX traffic to matching IPvX target IPs ?
I have a standard working, IPv4 setup with a bunch of EC2 behind a ALB that also terminates our TLS.
I'd like to accept incoming IPv6 traffic. I've added IPv6 to the subnets, migrated the LB to duel stack and updated the DNS with AAAA records, then updated the various security groups.
But when I use https://ready.chair6.net/ to send IPv6 only traffic, nothing arrives at the target EC2s.
So I am wondering if the ALB doesn't to 6-to-4 translation, and so I would need to add IPv6 IPs to all the target EC2s and then route to our app from there ?
Access was confirmed on EC2 with IPv6 disabled and duel stack in ALB.
The access log confirms that communication between ALB and EC2 is over IPv4.