Does cPanel's DNSOnly support IPv6?
A: DNSONLY supports serving IPv6 records, yes, but if you're referring to listening on an IPv6 address for incoming connections, that is not officially supported. You can find more details on that here at our Feature Requests page:
There is a workaround that some customers have reported success with on our forums here:
but since that's not an adjustment we verify with all our tools we aren't able to assist with that customization on our end.