Re: [secdir] SECDIR review of draft-ietf-6man-ipv6-address-generation-privacy-07
Donald Eastlake <d3e3e3@gmail.com> Mon, 03 August 2015 21:22 UTC
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Mon, 03 Aug 2015 17:22:28 -0400
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To: "Alissa Cooper (alcoop)" <alcoop@cisco.com>
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Cc: "draft-ietf-6man-ipv6-address-generation-privacy.all@tools.ietf.org" <draft-ietf-6man-ipv6-address-generation-privacy.all@tools.ietf.org>, IESG <iesg@ietf.org>, Dave Thaler <dthaler@microsoft.com>, "secdir@ietf.org" <secdir@ietf.org>
Subject: Re: [secdir] SECDIR review of draft-ietf-6man-ipv6-address-generation-privacy-07
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Hi Alissa, Thanks for your quick reply. I'm fine with all of your responses. I think the added explanation your propose of Low Byte in Section 1 is good and eliminates the need for any addition to Section 4.2 on that topic. Thanks, Donald ============================= Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA d3e3e3@gmail.com On Mon, Aug 3, 2015 at 4:04 PM, Alissa Cooper (alcoop) <alcoop@cisco.com> wrote: > Hi Donald, > > Thank you for your review. Comments in-line. > > On Aug 1, 2015, at 8:47 AM, Donald Eastlake <d3e3e3@gmail.com> wrote: > > I have reviewed this document as part of the security directorate's ongoing > effort to review all IETF documents being processed by the IESG. Document > editors and WG chairs should treat these comments just like any other last > call comments. > > This draft is ready with nits. It provides a survey of the privacy and > security considerations of a variety of IPv6 address generation mechanisms. > As far as I can tell, it does a thorough job and is a useful document. I > have the following minor comments: > > Section 1: Although references and lengthier names are given for all the > other categories of configuration method, the "Manual configuration" method > section is notable for the brevity of its entries and lack of any references > whatsoever. I don't have the faintest idea what "Wordy" is and a couple of > the others convey to me only a vague idea of what is being listed. > > > Understood. Here is my suggestion, drawing text from > draft-ietf-opsec-ipv6-host-scanning: > > OLD > o Manual configuration > > * IPv4 address > > * Service port > > * Wordy > > * Low-byte > > NEW > o Manual configuration > > * IPv4 address, in which the IID embeds the IPv4 address of the > network interface (as in 2001:db8::192.0.2.1) > > * Service port, in which the IID embeds the TCP/UDP service port of > the main service running on that node (as in 2001:db8::80 or 2001:db8::25) > > * Wordy, in which a word is encoded (as in 2001:db8::dead:beef) > > * Low-byte, in which most of the bytes of the IID are set to 0 > (except for the least significant byte) > > > > Section 2: What does "DHT" stand for? Given that it occurs exactly once in > this document, perhaps it should be spelled out. > > > Distributed hash table. Will make the change. > > > Section 3.3: It might also be useful to mention that the group-addressed bit > in the upper 24-bits of a 48 bit MAC will be zero and the global/local bit > will probably be zero also. It would be good to add a reference to RFC 7042. > > > Makes sense, will do. > > > Section 4, Table 1: Given that there seems to be plenty of space, I would > recommend spelling out "CGA" in the Mechanism column. > > > Will do. > > Also, I see no reason for the "(s)" on the end of "Mechanism" in the column > header. > > > I think this was for a category like static manual, that could encompass > multiple mechanisms in a single row of the table. > > > Section 4.2: "low byte", which occurs here as well as in Section 1, could > use a couple of sentences of explanation. > > > If the explanation above is provided in Section 1, does that suffice? > > > Section 4.3: The first sentence reads very oddly. Suggest replacing "it" > with "such a mechanism”. > > > Will do. > > > Section 5.2: Maybe it is just me but it sounds quite odd to come across a > "This document recommends" exactly once here almost at the end of this > Informational document. It is certainly a reasonable recommendation but > there are a number of previous points in the document where some mechanisms > seems so much better, from the privacy and security point of view, than > others that a recommendation would be equally justified. So I suggest > changing "This document recommends that compliance testing suites be ..." to > "Such compliance testing suites should be ...". (I realize that means about > the same thing but somehow it bothers me a lot less.) > > > That change works for me. > > Thanks, > Alissa > > Alternatively, state in the introduction that recommendations are provided > and review the document and add appropriate recommendation language in favor > of superior mechanisms. > > Thanks, > Donald > ============================= > Donald E. Eastlake 3rd +1-508-333-2270 (cell) > 155 Beaver Street, Milford, MA 01757 USA > d3e3e3@gmail.com
- [secdir] SECDIR review of draft-ietf-6man-ipv6-ad… Donald Eastlake
- Re: [secdir] SECDIR review of draft-ietf-6man-ipv… Alissa Cooper (alcoop)
- Re: [secdir] SECDIR review of draft-ietf-6man-ipv… Donald Eastlake