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Re: [trill] Eric Rescorla's No Objection on draft-ietf-trill-multilevel-unique-nickname-06: (with COMMENT)

Donald Eastlake <d3e3e3@gmail.com> Thu, 15 March 2018 01:23 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Wed, 14 Mar 2018 21:23:37 -0400
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To: Eric Rescorla <ekr@rtfm.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-trill-multilevel-unique-nickname@ietf.org, Susan Hares <shares@ndzh.com>, trill-chairs@ietf.org, trill IETF mailing list <trill@ietf.org>
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Subject: Re: [trill] Eric Rescorla's No Objection on draft-ietf-trill-multilevel-unique-nickname-06: (with COMMENT)
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Hi Eric,

A -07 version of draft-ietf-trill-multilevel-unique-nickname has been
posted with the intent of resolving your comment.

Thanks,
Donald
===============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com


On Mon, Mar 12, 2018 at 11:49 PM, Donald Eastlake <d3e3e3@gmail.com> wrote:
> Hi Eric,
>
> On Thu, Mar 8, 2018 at 9:27 AM, Eric Rescorla <ekr@rtfm.com> wrote:
>>
>> Eric Rescorla has entered the following ballot position for
>> draft-ietf-trill-multilevel-unique-nickname-06: No Objection
>>
>> ...
>>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>> In the security considerations,  isn't the requirement not that you configure
>> IS-IS authentication but that you actually have to require it on receipt? Or
>> are these the same things.
>
> I must admit that the current wording just talks about inclusion of
> authentication TLVs in a way which seems to leave out checking them
> :-)
>
> The wording should be improved.
>
>> Even with ordinary trill, can't you just spoof a lot of announcements with
>> other people's nicknames? Why is this different?
>
> Well, it is a bit more complex with IS-IS. It depends on just what you
> try to spoof. If you spoof an announcement from some existing RBridge,
> as soon as it is flooded to the claimed source RBridge that RBridge
> will issue an overwritting announcement or purge. But, unless you turn
> on appropriate security, there are ways to spoof announcements that
> would have bad effects.
>
> Thanks,
> Donald
> ===============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  155 Beaver Street, Milford, MA 01757 USA
>  d3e3e3@gmail.com

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