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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’d like to throw in my 2 cents. Clearly a browser has no clue if the DNS layer is operating under IDNA2003 or IDNA2008 rules, nor even if the current browser
supports post-IDNA2008 rules (like characters new to Unicode since IDNA2008). Particularly since different zones could operate under different rules. I think it’s likely that some browsers will have a relaxed set of rules, since strict adherence to any particular
version would likely break names/zones, whether future or old. The existence of UTS#46 seems to support the idea that some flexibility is desired.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">IMO it’s not the client’s responsibility to say whether DNS rules are being followed, but rather the DNS layer’s responsibility to correctly resolve names and
provide the appropriate errors when the name isn’t valid.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-Shawn<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> idna-update-bounces@alvestrand.no [mailto:idna-update-bounces@alvestrand.no]
<b>On Behalf Of </b>Vint Cerf<br>
<b>Sent:</b> Poʻakolu, Nowemapa 03, 2010 10:58 AM<br>
<b>To:</b> taliskermoon@hotmail.co.uk; idna-update@alvestrand.no<br>
<b>Subject:</b> Re: IDNA 2008 Question Re: "Confusable" Characters in Domain Names<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">If your browser is operating under purely idna2008 rules the lookup should fail. But some implementations may permit the lookup without verfying the legality of
the characters in the lookup string. V</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">:
<a href="mailto:idna-update-bounces@alvestrand.no">idna-update-bounces@alvestrand.no</a> <<a href="mailto:idna-update-bounces@alvestrand.no">idna-update-bounces@alvestrand.no</a>>
<br>
<b>To</b>: <a href="mailto:idna-update@alvestrand.no">idna-update@alvestrand.no</a> <<a href="mailto:idna-update@alvestrand.no">idna-update@alvestrand.no</a>>
<br>
<b>Sent</b>: Wed Nov 03 13:14:55 2010<br>
<b>Subject</b>: IDNA 2008 Question Re: "Confusable" Characters in Domain Names <o:p>
</o:p></span></p>
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<p class="MsoNormal"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">Dear List Members,</span></span><span class="apple-style-span"><span style="color:#2A2A2A"><o:p></o:p></span></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">I am a little unclear what impact the <span class="ecxapple-style-span">IDNA 2008 policy will have on</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">domain name registrant's who have a domain that does not fall under</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">the policy's permissible code-points, particularly symbol-based domain</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">names.</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;color:#2A2A2A"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">The IDNA 2008 protocol <span class="apple-style-span">clearly explains what code point are permissible,</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="apple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">but what (in practice) will it </span></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">mean <span class="ecxapple-style-span">if
someone types in e.g. €.com in their</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">browser under IDNA 2008?</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;color:#2A2A2A"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">I do realise that an error message may be displayed, but will IDNA 2008</span></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A"> </span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">allow <span class="apple-style-span">the domain name registrant to satisfy the user's query </span><span class="ecxapple-style-span">by forwarding</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span class="ecxapple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">them </span></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">on
to a <span class="ecxapple-style-span">different (legal) domain name?</span></span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;color:#2A2A2A"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">I will hope to hear any replies on this matter.</span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;color:#2A2A2A"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">Regards,</span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:#2A2A2A"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#2A2A2A">John Daw</span><span style="font-size:10.0pt;color:#2A2A2A"><o:p></o:p></span></p>
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