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Re: Address privacy

Ted Lemon <mellon@fugue.com> Wed, 29 January 2020 01:05 UTC

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From: Ted Lemon <mellon@fugue.com>
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Subject: Re: Address privacy
Date: Tue, 28 Jan 2020 20:04:59 -0500
In-Reply-To: <CALx6S36f41nbj=2fibt9X2EpDO1Rz6o2Fm-QeNMvUfzPCu10jw@mail.gmail.com>
Cc: Fernando Gont <fgont@si6networks.com>, 6man WG <ipv6@ietf.org>
To: Tom Herbert <tom@herbertland.com>
References: <03C832CE-7282-4320-BF1B-4CB7167FE6BE@employees.org> <1962.1579823388@localhost> <f83ab037-9125-bb74-dbac-68850aeb1020@huitema.net> <CBB23ABE-A7A3-4208-873C-E47EE063E34B@fugue.com> <11855.1579980079@localhost> <CALx6S36V_VjaxhELYcsgDYLWsCkj20p6gtiY9T9Q=9-9Oibyjw@mail.gmail.com> <32626.1580060558@localhost> <CALx6S37prWACD0jv9c-XHD-JtPqZAcgeT2Ax0EZHkiQaDR4t=g@mail.gmail.com> <419b7c7a-e364-7951-5a44-6c39e1da65fb@joelhalpern.com> <CALx6S36802oDaEgojAPq2c6hM_s1BayidXPh1Sc6RZmZa9UHpQ@mail.gmail.com> <6c5ba72d-9289-90ba-a1c9-2307ed29a4da@foobar.org> <a98bf2ab-32e7-459b-14d2-5e0e1c65a229@si6networks.com> <CALx6S36J5TPnXJQyMW2NUbQV6KL_oqUQ01m+BEzBJ+xcHpmQWw@mail.gmail.com> <bc0d1eb8-2301-224d-dc33-19f6a60e593e@si6networks.com> <CALx6S34i67ivt8t1P3omRVzsj9NfxY2t41JLjmjT6X0vtBQHKQ@mail.gmail.com> <1fc7816e-6179-28d6-7b11-be2027561a54@si6networks.com> <CALx6S37KXfLE22uHMZTD41+jR7fdZd9PZGqO-r4SE2LehtN=Gg@mail.gmail.com> <2d312ecf-e037-5c24-28d7-2a2c3dc06363@si6networks.com> <CALx6S37A1QzR0PhDUzujXGiB+a-9c1qG4g8TE8KOcxOLKP18TQ@mail.gmail.com> <42900FAF-7FD8-46D8-9831-5B9E520814BB@fugue.com> <CALx6S36f41nbj=2fibt9X2EpDO1Rz6o2Fm-QeNMvUfzPCu10jw@mail.gmail.com>
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On Jan 28, 2020, at 7:47 PM, Tom Herbert <tom@herbertland.com> wrote:
> Addresses might be correlated to a provider, but no correlations can
> be made between addresses within the provider space so attributing
> different flows to the same user cannot be done. A NAT device with a
> large number backend users would exhibit these properties even in
> IPv4.

Are we talking about privacy addresses, or something else?   If privacy addresses, the /64 that you have configured on your home network is a pretty good identifier; at least as good as the IPv4 address you have configured on the northbound interface of your NAT home gateway.

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