Add IPv6 to IPv4 Only Dedicated Server With Nginx IPv4 to IPv6 Reverse Proxy Running On Virtual Server.
A Record AAAA Record
+-------------------+ +---------------------+
| Dedicated Server |====>| Virtual Server | ===> Headers and HTML passed
| | | With IPv6 running |
| With IPv4 Only | | Nginx reverse proxy |
| running Apache | +---------------------+
| or Nginx |
+-------------------+
You'll pass SSL Labs test too : https://www.ssllabs.com/ssltest/analyze.html?d=thecustomizewindows.com&s=2a00%3a6d40%3a40%3a506e%3a0%3a0%3a0%3a1
Described here - https://thecustomizewindows.com/2016/11/add-ipv6-ipv4-server-nginx-reverse-proxy/