Re: [tram] Publication has been requested for draft-ietf-tram-stun-pmtud-07
Marc Petit-Huguenin <marc@petit-huguenin.org> Mon, 20 August 2018 16:08 UTC
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From: Marc Petit-Huguenin <marc@petit-huguenin.org>
To: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>
Cc: draft-ietf-tram-stun-pmtud@ietf.org, tram-chairs@ietf.org, tram@ietf.org, Tolga Asveren <tasveren@rbbn.com>
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Date: Mon, 20 Aug 2018 09:07:57 -0700
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Subject: Re: [tram] Publication has been requested for draft-ietf-tram-stun-pmtud-07
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Hi SPencer, Sorry for the delay on resolving that issue. See below for my answer. On 05/15/2018 08:33 AM, Spencer Dawkins at IETF wrote: > Hi, Marc, > > On Mon, May 14, 2018 at 6:50 PM, Marc Petit-Huguenin < > marc@petit-huguenin.org> wrote: > [...] >> >>> >>> 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. > As far as I can tell, there is 3 major ways of preventing source IP spoofing at this layer, but I was not able to find a unique reference that points to an explanation to these. So the plan is to add, after some copy-editing with my co-editor, the following text in replacement of the "For example, using authentication can ensure this." sentence: " An amplification attack can be prevented using three different techniques: o Authentication, where the source of the packet and the destination share a secret. o 3 way handshake with some form of unpredictable cookie. o Make sure that the total size of the traffic potentially generated is lower than the size of the request that generated it." Would that resolve that issue? Thanks. -- Marc Petit-Huguenin Email: marc@petit-huguenin.org Blog: https://marc.petit-huguenin.org Profile: https://www.linkedin.com/in/petithug
- Re: [tram] Publication has been requested for dra… Gonzalo Camarillo
- [tram] Publication has been requested for draft-i… Gonzalo Camarillo
- Re: [tram] Publication has been requested for dra… Spencer Dawkins at IETF
- Re: [tram] Publication has been requested for dra… Gonzalo Camarillo
- Re: [tram] Publication has been requested for dra… Marc Petit-Huguenin
- Re: [tram] Publication has been requested for dra… Spencer Dawkins at IETF
- Re: [tram] Publication has been requested for dra… Spencer Dawkins at IETF
- Re: [tram] Publication has been requested for dra… Marc Petit-Huguenin
- Re: [tram] Publication has been requested for dra… Spencer Dawkins at IETF
- Re: [tram] Publication has been requested for dra… Marc Petit-Huguenin
- Re: [tram] Publication has been requested for dra… Spencer Dawkins at IETF
- Re: [tram] Publication has been requested for dra… Marc Petit-Huguenin
- Re: [tram] Publication has been requested for dra… Spencer Dawkins at IETF