I have decided to create an entire blog page dedicated to IPv6. This site is on a server that is configured for IPv6. After a year of working on IPv6 with Fortinet from AT&T. I finally abandoned AT&T and switched to Comcast.
I followed Thorsten’s site
ipv6-with-prefix-delegation-on-fortigate/
Comcast brought me down all 8 interfaces and both WIFI interfaces the Prefix-Delegated Subnets for IPv6. I made the other changes to the firewall and IPv6 has /64 addresses on every interface and can route in and out.
After further testing on one of the Apache2 Web Servers it fully resolves IPv6.
https://ipv6.scsiraidguru.com/
https://science.scsiraidguru.com/
https://virl.scsiraidguru.com/
https://wp.pandjmckenneyfamily.com/
Fortinet is checking into a way for the other web server to work IPv6. You can setup an IPv4 VIP from URL to IP. They are checking on doing it with IPv6.