I've been pondering IPv6 setups, and I don't understand how IPv6 rDNS is supposed to work. It's clear enough how you look up any particular address, but it's not at all clear to me what you put into an rDNS zone and how you put it there. In IPv4 land, it is standard to assign matching forward and reverse DNS for every live IP, and a fair number of services treat requests from hosts without rDNS with added scepticism. For consumer networks, it's often something like 12-34-56-78.adsl.incompetent.net, with the numbers being the IP address forward or backwards. So if every customer gets a /64, what do you do? You can use a wildcard to give the same rDNS to all 2^64 addresses, but you can't do matching forward DNS, since a DNS response with 2^64 AAAA records would be, ah, a little unwieldy. When hosts self-configure their low 64 bits, do you install a suitable PTR and AAAA into your DNS? If so, how? Do you use DHCPv6 and have it install the DNS? Do you do something else? Signed, Confused