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Re: [OPSAWG] Last Call Review of draft-ietf-opsawg-mud-acceptable-urls-10

Eliot Lear <lear@lear.ch> Wed, 28 February 2024 10:15 UTC

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Date: Wed, 28 Feb 2024 11:15:03 +0100
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To: Christian Huitema <huitema@huitema.net>
Cc: "sec-ads@ietf.org" <sec-ads@ietf.org>, "opsawg@ietf.org" <opsawg@ietf.org>, draft-ietf-opsawg-mud-acceptable-urls@ietf.org
References: <8a2c556a-905b-46f9-926c-03f09ed98f32@lear.ch> <66588cac-0f33-4924-920f-6b4dbd5c2964@huitema.net>
From: Eliot Lear <lear@lear.ch>
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Subject: Re: [OPSAWG] Last Call Review of draft-ietf-opsawg-mud-acceptable-urls-10
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Hi Christian,

Just on this point:

On 28.02.2024 10:05, Christian Huitema wrote:
>
> How do you know that a specific URL is a rollback? It looks easy when 
> the example say "revision1" and "revision2", but I am sure there are 
> cases where you cannot tell by just looking at the URL. You may be 
> able to download the "old" and "new" URL, and check the date of the 
> signature. But then, please describe the process so implementers are 
> not confused. 

The MUD manager should keep a history of bindings between devices and 
MUD-URLs.  That's obviously only as secure as the binding of that URL to 
the device (I would also note that that is improving day-by-day).

Eliot

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