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

"Templin (US), Fred L" <Fred.L.Templin@boeing.com> Mon, 03 August 2020 17:20 UTC

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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Christian Huitema <huitema@huitema.net>, Fernando Gont <fernando@gont.com.ar>
CC: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, v6ops list <v6ops@ietf.org>, 6man <ipv6@ietf.org>
Thread-Topic: [v6ops] [EXTERNAL] Re: Improving ND security
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Date: Mon, 03 Aug 2020 17:20:24 +0000
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References: <3978163f-8815-1bd4-0fda-d84df9cbe684@gont.com.ar> <AA568F39-3733-4F73-872E-2E84EDA2F077@huitema.net>
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Subject: Re: [v6ops] [EXTERNAL] Re: Improving ND security
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Christian,

> -----Original Message-----
> From: Christian Huitema [mailto:huitema@huitema.net]
> Sent: Monday, August 03, 2020 10:02 AM
> To: Fernando Gont <fernando@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>
> Subject: Re: [v6ops] [EXTERNAL] Re: Improving ND security
> 
> This message was sent from outside of Boeing. Please do not click links or open attachments unless you recognize the sender and
> know that the content is safe.
> 
> > 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.



What has been the experience with RFC4380 security in-the-wild? Is it considered
"secure enough" out of the box? Or, if you had to do it again would you incorporate
something "more secure" like SEND/CGA?

Thanks - Fred


> -- Christian Huitema

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