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Re: [Asrg] DNSBL and IPv6

Matthias Leisi <matthias@leisi.net> Fri, 26 October 2012 13:32 UTC

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From: Matthias Leisi <matthias@leisi.net>
Date: Fri, 26 Oct 2012 15:32:14 +0200
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Subject: Re: [Asrg] DNSBL and IPv6
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On Fri, Oct 26, 2012 at 3:27 PM, Mikael Abrahamsson <swmike@swm.pp.se> 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

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