Re: [tcpm] Comments on draft-ietf-tcpm-ao-test-vectors

"Scharf, Michael" <Michael.Scharf@hs-esslingen.de> Tue, 12 October 2021 07:56 UTC

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From: "Scharf, Michael" <Michael.Scharf@hs-esslingen.de>
To: "touch@strayalpha.com" <touch@strayalpha.com>
CC: "tcpm@ietf.org" <tcpm@ietf.org>, "draft-ietf-tcpm-ao-test-vectors@ietf.org" <draft-ietf-tcpm-ao-test-vectors@ietf.org>
Thread-Topic: [tcpm] Comments on draft-ietf-tcpm-ao-test-vectors
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Date: Tue, 12 Oct 2021 07:56:20 +0000
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Subject: Re: [tcpm] Comments on draft-ietf-tcpm-ao-test-vectors
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Yep, the ambiguous wording in the abstract triggered my comment. Both mechanisms should be explained separately.

Thanks

Michael

From: touch@strayalpha.com <touch@strayalpha.com>
Sent: Tuesday, October 12, 2021 5:38 AM
To: Scharf, Michael <Michael.Scharf@hs-esslingen.de>
Cc: tcpm@ietf.org; draft-ietf-tcpm-ao-test-vectors@ietf.org
Subject: Re: [tcpm] Comments on draft-ietf-tcpm-ao-test-vectors


—
Joe Touch, temporal epistemologist
www.strayalpha.com<http://www.strayalpha.com>


On Oct 11, 2021, at 3:15 PM, touch@strayalpha.com<mailto:touch@strayalpha.com> wrote:

I find the term "NAT traversal" confusing in this context. As outlined in
Section 9.2 of RFC 5925, "TCP-AO cannot interoperate natively across NAT/NAPT
(Network Address Port Translation) devices, which modify the IP addresses
and/or port numbers." The term "middlebox" used in Section 9.1 of RFC 5925 may
be a better choice.


It should cite rfc6978 for the latter, and NAT is the term used there because this isn’t a generic middlebox issue.

Correction: there are two different features and they are ambiguously indicated.

The abstract should refer to middle box traversal (removing TCP options from coverage); the intro later describes NAT traversal, which omits the port numbers. The two are distinct and this has been clarified in the new text.

Joe