Re: [tram] Publication has been requested for draft-ietf-tram-stun-pmtud-07

Marc Petit-Huguenin <marc@petit-huguenin.org> Tue, 10 July 2018 16:47 UTC

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To: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>, Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
Cc: draft-ietf-tram-stun-pmtud@ietf.org, tram-chairs@ietf.org, tram@ietf.org, "Asveren, Tolga" <tasveren@rbbn.com>
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From: Marc Petit-Huguenin <marc@petit-huguenin.org>
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Date: Tue, 10 Jul 2018 09:47:25 -0700
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Subject: Re: [tram] Publication has been requested for draft-ietf-tram-stun-pmtud-07
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On 07/10/2018 09:12 AM, Spencer Dawkins at IETF wrote:
> Dear TRAMsters,
> 
> On Mon, Jun 18, 2018 at 5:35 AM Gonzalo Camarillo <
> Gonzalo.Camarillo@ericsson.com> wrote:
> 
>> Hi,
>>
>> related to the following exchange between Marc and Spencer:
>>
>>>     > If using authentication in
>>>     >
>>>     >   UDP-based protocols that want to use any of these mechanisms,
>>>     >    including the PMTUD-SUPPORTED attribute, to signal PMTUD
>> capabilities
>>>     >    MUST ensure that it cannot be used to launch an amplification
>> attack.
>>>     >    For example, using authentication can ensure this.
>>>     >
>>>     > is only one way to ensure prevention of amplification attacks, is
>> there any
>>>     > guidance or reference you could point to that would help
>> implementers
>>>     > evaluate other approaches?
>>>
>>>     It's a good question.  I have to think about that.
>>>
>>>
>>> Thanks for the quick and thorough responses.
>>>
>>> I think I'm good on your responses for all my other questions. I'll let
>>> the working group chew on this one, and let the chairs/shepherd let me
>>> know when to request Last Call.
>>
>> Where are we with this? Do we have a way forward?
>>
> 
> I didn't mean to ask a hard question here. Is this going to be difficult to
> figure out?
> 

The short answer is that I could not find a good reference pointing to guidance about that, so I prepared some text that I want to discuss with my co-author next week in Montreal.

-- 
Marc Petit-Huguenin
Email: marc@petit-huguenin.org
Blog: https://marc.petit-huguenin.org
Profile: https://www.linkedin.com/in/petithug