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Re: [v6ops] The need for local-ipv4 socket transition solutions -- NAT64/DNS64 remains insufficient

Ted Lemon <Ted.Lemon@nominum.com> Mon, 27 April 2015 11:23 UTC

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From: Ted Lemon <Ted.Lemon@nominum.com>
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Date: Mon, 27 Apr 2015 07:22:53 -0400
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References: <CAD6AjGT-hG-uvRQvRosrZtfrf0Nb8ne9jy=tD9oh=5zNM42Xsg@mail.gmail.com> <CAD6AjGTcKgK8W+VB1H5EQpHaYiKVYXqOz_2RS-w_CiTf9kL2CQ@mail.gmail.com> <CADhXe530+OVZrFZVaYh1-zoRDvJhUd0rf4sx6a2nO8SvKmm6zg@mail.gmail.com> <CAPi140PQ+TF0rED_bQPeS=Fj415qt0-zE2RdGnEL34PAzHyx6Q@mail.gmail.com> <CAD6AjGTjXAeMF6pw5MO2Jrf9B8LJ48D3m1YTVkdBe=_OHjtroQ@mail.gmail.com> <CADhXe51TCqU2eMP4LS3DooZxQDAPD95OVJDXbiU7qvuvKCMq+w@mail.gmail.com> <CAKD1Yr2=zc57+pOA9TFs+0azw0ZR1g67+08T=9eZPHjGXBvgFQ@mail.gmail.com> <CADhXe53T_30pj7xxwNs=mWEnd=do6oiq3KgN=U-gHLrLF-gG7Q@mail.gmail.com> <D1441574.4C168%wesley.george@twcable.com> <CAD6AjGQrzoBJrqQfKO0N8Ji=oJ-ZP6Sn88sXf=opJ6bYVmTDZg@mail.gmail.com> <552102B0.6070904@cernet.edu.cn> <35D97B17-8E83-43CF-ABEF-122572F1321A@eircom.net> <552369C8.5000801@cernet.edu.cn> <CADhXe51BDuPhc8wdKGmRiBfSnrz7PMtqYXaoDO+5cwLx_xW2tw@mail.gmail.com> <55290E26.8080500@cernet.edu.cn> <CADhXe50zz9EtNtifMh+tN9XT-jKCTJB=vsQ6uG515iddOo7f2Q@mail.gmail.com> <6536E263028723489CCD5B6821D4B21303E8C63A@UK30S005EXS06.EEAD.EEINT.CO.UK> <67A2A6E4-0603-4E84-8534-EA6C706C6D5D@lists.zabbadoz.net> <6536E263028723489CCD5B6821D4B21303E8CBAB@UK30S005EXS06.EEAD.EEINT.CO.UK> <0C3D10F1-B8AF-4097-91C6-D92CDDD5978D@nominum.com> <CAD6AjGR65jtZN4NV62p1XnUgoQRC+h=ELmsLcQaFTdrToMtwRA@mail.gmail.com> <CADhXe53VJeUDLpq2fpdndXF1VyPzQLTO=3LEYqbpOFmEPNbCJw@mail.gmail.com> <54AE4471-B568-4A92-B12D-137AD5950B60@nominum.com> <CADhXe52acGYR-y7VNpfXt=OQK7uqm1vNyHL3mwGhX8cpaYyW3A@mail.gmail.com> <CAKD1Yr0UAYH+tCc7LCLWbqzqiez7kZNJ8mVH3FB-K1LvnjXVUQ@mail.gmail.com> <CADhXe5302YTxvTSqoOyXJSMiT_vpuhkZPiE3W1Kty8E-Pd89nw@mail.gmail.com> <CAKD1Yr0snsxmHMXazJfKFhYhOpj3a+wNKcGuhHLgLXAhd07ixg@mail.gmail.com>
To: Lorenzo Colitti <lorenzo@google.com>
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Subject: Re: [v6ops] The need for local-ipv4 socket transition solutions -- NAT64/DNS64 remains insufficient
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On Apr 26, 2015, at 9:37 PM, Lorenzo Colitti <lorenzo@google.com> wrote:
> So, assuming it isn't... what sort of questions do you see around 464xlat that cannot be immediately answered by just saying that "464xlat is an unnumbered IPv4-only point-to-point link"?

You're right, that makes it trivial.   Most applications are used to dealing with unnumbered IPv4-only point-to-point tunnels, so there's no explanation needed!   ;)

Seriously, I have to say that if I saw that explanation, I would have no idea what it meant.   My understanding, having never actually _used_ 464xlat knowingly, is that you open a socket and send on it and it just works, and that since most applications don't try to figure out what their source address is this isn't a problem.   But that's not what I would take your proposed text to mean.

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