Re: [Int-area] draft-learmonth-intarea-rfc1226-bis-00

Erik Kline <ek.ietf@gmail.com> Sat, 23 May 2020 21:24 UTC

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From: Erik Kline <ek.ietf@gmail.com>
Date: Sat, 23 May 2020 14:24:26 -0700
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To: "Iain R. Learmonth" <irl@hambsd.org>
Cc: Int-area@ietf.org
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Subject: Re: [Int-area] draft-learmonth-intarea-rfc1226-bis-00
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Iain,

Overall, LGTM.

Questions and notes:

[ section 3.2 ]

* Does "IPENC" need to be officially recorded in an official registry
somewhere?  Or has this already been done and a link to it can be
included in this draft?

I wasn't able to find this word in the APRS PDF linked to in the references.

[ section 5 ]

* Can you explain more about the limitations on non-NULL encryption?

My intuition would be that ESP with non-NULL encryption provides
privacy only on the IP links between tunnel endpoints.  A packet that
failed to decrypt properly would not be transmitted over the amateur
radio link, but rather be dropped by the IP endpoint (and possibly
logged).  I don't think I follow what the intent of this section is.

* I cannot find the phrase "dead peer detection" in RFC 7926, nor is
that the IKEv2 RFC.  I think perhaps you meant RFC 7296 (numeric
transposition).