Re: [Udp35] Snowden and SPUD

Michael Welzl <michawe@ifi.uio.no> Mon, 20 July 2015 17:31 UTC

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From: Michael Welzl <michawe@ifi.uio.no>
Date: Mon, 20 Jul 2015 19:30:57 +0200
To: Eliot Lear <lear@cisco.com>
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Subject: Re: [Udp35] Snowden and SPUD
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Sent from my iPhone

> On 20. juli 2015, at 19:21, Eliot Lear <lear@cisco.com> wrote:
> 
> 
> 
>> On 7/20/15 7:16 PM, Michael Welzl wrote:
>> oh and btw: your syn / synack assumes middleboxes trust end systems' tcps to act right - which is a point i made. will they immediately trust spud? why should they - just cause it's easy?  that's a weird reason to trust someone.
> 
> "Immediately" is a word I might have some difficulty with, but if the
> semantics are such that there's at least a high likelihood that the host
> will do the right thing, that makes getting UDP through firewalls
> easier, and that's got to be worth something to both app developers and
> their users (the people who have a relationship with the people who
> manage the firewalls).
> 
> And so this brings me back to your earlier note: nobody wants to
> duplicate ALL of TCP.  It's there.  Twice if you count SCTP ;-)  But
> others ARE using UDP and might find their applications more deployable
> if they layer them atop SPUD (which could yet come for free with DTLS).

but my point wasn't about functionality. it was about tcp's ability to pass. what i meant is: you can get yet another carrier that would work on port 80 for the web, etc.  fwiw.



> 
> Eliot
> 
> 
>