Re: [DNSOP] draft-liman-tld-names-04
Alfred Hönes <ah@TR-Sys.de> Wed, 24 November 2010 16:16 UTC
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From: Alfred Hönes <ah@TR-Sys.de>
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Date: Wed, 24 Nov 2010 17:16:41 +0100
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Subject: Re: [DNSOP] draft-liman-tld-names-04
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Folks, Widespread diverse restrictions in devices/implementations/applications with an expected residual lifetime in the order of a another decade _are_ technical restrictions, not policy. All work on DNS I have followed in the recent years always was under the umbrella of conserving compatibility with deployed systems, and the costs for doing that indeed sometimes were really high. This was justified. Robustness has to remain the guiding principle when "tuning" the DNS. One of the obligations we have in the IETF is, IMHO, to take care of transparency, to avoid introducing fragility that hampers communication between users all over the world. That's an engineering aspect, and hence a technical aspect, not policy. We are faced with a scenario where some few voices want to open the doors wide to challenge the force of storms. Isn't is better engineering practice to keep the door almost closed, open it only a small slot wide -- just so much as current needs have been identified --, and observe what happens, before undertaking the next step? If the storm breathes in and destroys your ... (here: ability for all to communicate using all assigned domain names), you likely won't be able to close the door back far enough to restitute something resembling the "status quo ante"! Andrew Sullivan spoke: > I think Joe's pragmatic approach is the right one: document right now > that whatever the restrictions might historically have been, we are > quite explicitly going to permit at the very least one class of > labels. +1 > If people feel strongly that in fact the TLD label restriction never > was there and should not be, then once this document is published you > all can go out and write the draft, "TLD label character restrictions > considered harmful", and pursue the publication of that as an RFC. In > the meantime, we have at least a technical document that makes clear > that certain things are permitted. +1 Looking through another pair of glasses, this seems to be a simple application of the robustness principle: - be conservative in what you send (frequently: "MUST set to 0, unless future specs say otherwise", and here: be conservative in what labels are allowed to be placed in the public DNS), but - be liberal in what you accept (frequently: "MUST ignore the value, to allow for future extensions", and here: educate implementers that they should get rid of restrictions that prohibit future extension of the set of possible labels to be expected) If you want to define an extension later for the 'originating' side, it is prudent to check for adherence to the "be liberal" principle on the 'consumer' side before you do it. Kind regards, Alfred. -- +------------------------+--------------------------------------------+ | TR-Sys Alfred Hoenes | Alfred Hoenes Dipl.-Math., Dipl.-Phys. | | Gerlinger Strasse 12 | Phone: (+49)7156/9635-0, Fax: -18 | | D-71254 Ditzingen | E-Mail: ah@TR-Sys.de | +------------------------+--------------------------------------------+
- [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Mans Nilsson
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Paul Hoffman
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Suzanne Woolf
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 ]ke Nordin
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Richard Clayton
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Suzanne Woolf
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- [DNSOP] Writing rules for French (Was: draft-lima… Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 James Mitchell
- Re: [DNSOP] Writing rules for French (Was: draft-… Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] Writing rules for French (Was: draft-… Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] Writing rules for French (Was: draft-… Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- [DNSOP] clue w.r.t. arabic (was: Re: draft-liman-… Eric Brunner-Williams
- Re: [DNSOP] clue w.r.t. arabic Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] clue w.r.t. arabic Masataka Ohta
- Re: [DNSOP] clue w.r.t. arabic Eric Brunner-Williams
- Re: [DNSOP] clue w.r.t. arabic Masataka Ohta
- Re: [DNSOP] clue w.r.t. arabic Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 James Mitchell
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Patrik Fältström
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Alfred Hönes
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Richard Clayton
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Doug Barton
- Re: [DNSOP] draft-liman-tld-names-04 Jaap Akkerhuis
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Joe Abley
- Re: [DNSOP] draft-liman-tld-names-04 Suzanne Woolf
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 James Mitchell
- Re: [DNSOP] draft-liman-tld-names-04 Chris Wright
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Andrew Sullivan
- Re: [DNSOP] draft-liman-tld-names-04 Andreas Gustafsson
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Eric Brunner-Williams
- Re: [DNSOP] draft-liman-tld-names-04 David Conrad
- Re: [DNSOP] draft-liman-tld-names-04 Masataka Ohta
- Re: [DNSOP] draft-liman-tld-names-04 Tony Finch
- Re: [DNSOP] draft-liman-tld-names-04 Stephane Bortzmeyer
- Re: [DNSOP] draft-liman-tld-names-04 Mark Andrews