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Re: [homenet] Please review security considerations of draft-homenet-babel-profile

Gert Doering <gert@space.net> Thu, 27 July 2017 13:40 UTC

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Date: Thu, 27 Jul 2017 15:40:51 +0200
From: Gert Doering <gert@space.net>
To: Philip Homburg <pch-homenet-3@u-1.phicoh.com>
Cc: homenet@ietf.org, Juliusz Chroboczek <jch@irif.fr>
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Subject: Re: [homenet] Please review security considerations of draft-homenet-babel-profile
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Hi,

On Thu, Jul 27, 2017 at 03:38:15PM +0200, Philip Homburg wrote:
> The TTL hack is used in ND. 

Because ND uses GUAs (which it should have never done in the first place).

> It strikes me as really bad for security to come
> up with a different mechanism to achieve the same result for no other reason
> than that you for some reason didn't like that trick.

Relying on "it must be a link local src and link local dst" sounds much
more sane than "we permit arbitrary packets to reach us from the outside
and then worry about criteria to ignore them afterwards".

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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