I assume you just mean that test-ipv6 gives you the warning: "Your DNS server (possibly run by your ISP) appears to have no access to the IPv6 internet, or i

I assume you just mean that test-ipv6 gives you the warning: "Your DNS server (possibly run by your ISP) appears to have no access to the IPv6 internet, or is not configured to use it." I get that too (I have IPv4/IPv6 connectivity) I really wouldn't worry about it too much. We're FAR from the day when anybody could contemplate publishing their public DNS zones using just IPv6-only nameservers. Therefore a recursive IPv4-only server will continue to work for a LONG time. The more immediate problem is publishing servers running IPv4-only (making a fully-recursive IPv6 only server impossible) The good news is that the large DNS-providers seem to be mostly on the ball about this. There are, however, still a few TLDs with IPv4-only DNS (.co is one example)