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Re: [v6ops] [EXTERNAL] Re: Improving ND security

Christian Huitema <huitema@huitema.net> Mon, 03 August 2020 17:03 UTC

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From: Christian Huitema <huitema@huitema.net>
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Date: Mon, 3 Aug 2020 10:01:52 -0700
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References: <3978163f-8815-1bd4-0fda-d84df9cbe684@gont.com.ar>
Cc: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>, "Pascal Thubert (pthubert)" <pthubert@cisco.com>, v6ops list <v6ops@ietf.org>, 6man <ipv6@ietf.org>
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To: Fernando Gont <fernando@gont.com.ar>
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Subject: Re: [v6ops] [EXTERNAL] Re: Improving ND security
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> On Aug 3, 2020, at 9:35 AM, Fernando Gont <fernando@gont.com.ar> wrote:
> 
> On 3/8/20 11:22, Templin (US), Fred L wrote:
>> ...
> 
> 
> 
>> But then, RFC4380 offers a “poor-man’s” alternative to SEND/CGA. It places a message authentication code in the encapsulation headers of IPv6 ND messages so that the messages can pass a rudimentary authentication check.
> 
> You mean the Teredo spec? If so, I don't think it includes any sort of poor-man's SEND-CGA.

Configuration mistakes were a big concern during the design of Teredo, and that's a reason why Teredo embeds continuity tests. But these tests will not resist an on-path attacker, let alone an on-link attacker.

> 
> 
>> ...

-- Christian Huitema

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