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Re: Disabling temporary addresses by default?

Lorenzo Colitti <lorenzo@google.com> Wed, 29 January 2020 11:19 UTC

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References: <03C832CE-7282-4320-BF1B-4CB7167FE6BE@employees.org> <c4166907-b6c9-a4ef-fd59-cf539bbe0405@si6networks.com> <43D76C96-C16B-4BEB-B9B8-C68D53BCE63F@fugue.com> <fb5b8377-892d-2777-ef9b-4f9ddefa6c93@si6networks.com> <CAKD1Yr034_tu7ZoJ1FCfDYhNSN6igm-ZQyR4u3U+UDMr=huGOw@mail.gmail.com> <1af0b06d-f9d7-5ea1-27f3-b417eb9148fa@si6networks.com> <7606A049-318D-4526-917D-F2A801BF7050@cisco.com> <CAKD1Yr1d9kORFdoOJr22J_UDJ9hLPr6AQLyWuh7=bAQKa+aXGw@mail.gmail.com> <MN2PR11MB356588FC3E8A6410B725D159D80A0@MN2PR11MB3565.namprd11.prod.outlook.com> <CAKD1Yr35meRGh_POo_2jrHA_oazO1xUOG5G_rx43xNLFYHQsMQ@mail.gmail.com> <MN2PR11MB356526F01CAE1CADEF8E4472D80A0@MN2PR11MB3565.namprd11.prod.outlook.com> <CAKD1Yr0-rmyzz3y1d+pCpA0+tGuhSdjojaJovXUzVuyx6UdeLA@mail.gmail.com> <98179a48-8d86-4673-6c82-fc0022988862@foobar.org> <F84FEFAF-1F78-47D4-B3E0-981DCFD0CB58@employees.org> <CAKD1Yr11_SSUkCBuQ3-h+eRg0LPZQdhe+h7f0YZy9TiyRWj6mw@mail.gmail.com> <1F1CE807-5466-42B3-AA37-8C916EAB545C@gmail.com> <f02490c8-5f52-acf6-75e7-109d10d89740@si6networks.com>
In-Reply-To: <f02490c8-5f52-acf6-75e7-109d10d89740@si6networks.com>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 29 Jan 2020 20:19:16 +0900
Message-ID: <CAKD1Yr3H06F9__Bp99Co8vW=UNdk=bbtAvBpCjr3SuRVBDi4MQ@mail.gmail.com>
Subject: Re: Disabling temporary addresses by default?
To: Fernando Gont <fgont@si6networks.com>
Cc: Bob Hinden <bob.hinden@gmail.com>, IPv6 List <ipv6@ietf.org>
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On Wed, Jan 29, 2020 at 7:43 AM Fernando Gont <fgont@si6networks.com> wrote:

> Option #2: Reduce the N ratio, but allow ongoing sessions to use invalid
> addresses. This could be worse than legacy RFC4941 (if long lived
> sessions last more than a week), since now temporary addresses would not
> have a limited lifetime (the lifetime would only be limited wrt the
> ability to employ them for new transport protocol instances)
>

ISTM that "using invalid addresses" is poorly defined and likely difficult
to implement. It also isn't not much (if at all) different from the current
status quo with lots of deprecated addresses. The only difference is that
it forbids allow applications from purposely binding to an expired address.
But applications don't do that - why would they? The current privacy
address is better than that address in every way.

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