Re: DNSBL and IPv6

On Fri, Oct 26, 2012 at 3:27 PM, Mikael Abrahamsson <[email protected]> wrote:

>> 1) from one IP to another inside their own /64
>> 2) from one /64 to another
>> 3) from one ISP to another, particularly where showshoe-like schemes are
>> in place
>
> I believe it's going to be common enough that legitimate MTAs will move
> around within their /64 quite frequently (privacy extensions that are

Using a /64 as a default seems reasonable, but a new standard for
DNSxL lookups should provide some flexibility, either for a full list
("default prefix length = /56") or on a more granular level (using
John L.'s original proposal, or some other useful method).

-- Matthias