<div dir="ltr"><div>The glue records for all TLD NSes are in the root zone.<br><br></div>What makes one label fragile, and another label robust?<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Oct 24, 2013 at 10:19 AM, Chris Thompson <span dir="ltr"><<a href="mailto:cet1@cam.ac.uk" target="_blank">cet1@cam.ac.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Oct 24 2013, Paul Hoffman wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
The new records for one of the shiny new gTLDs are:<br>
<br>
xn--ngbc5azd. 172800 IN NS a.nic.xn--ngbc5azd.<br>
xn--ngbc5azd. 172800 IN NS b.nic.xn--ngbc5azd.<br>
xn--ngbc5azd. 172800 IN NS c.nic.xn--ngbc5azd.<br>
xn--ngbc5azd. 172800 IN NS d.nic.xn--ngbc5azd.<br>
a.nic.xn--ngbc5azd. 172800 IN A 37.209.192.3<br>
a.nic.xn--ngbc5azd. 172800 IN AAAA 2001:dcd:1:0:0:0:0:3<br>
b.nic.xn--ngbc5azd. 172800 IN A 37.209.194.3<br>
b.nic.xn--ngbc5azd. 172800 IN AAAA 2001:dcd:2:0:0:0:0:3<br>
c.nic.xn--ngbc5azd. 172800 IN A 37.209.196.3<br>
c.nic.xn--ngbc5azd. 172800 IN AAAA 2001:dcd:3:0:0:0:0:3<br>
d.nic.xn--ngbc5azd. 172800 IN A 37.209.198.3<br>
d.nic.xn--ngbc5azd. 172800 IN AAAA 2001:dcd:4:0:0:0:0:3<br>
<br>
This works, of course, but it feels a bit fragile for me. Is there a history<br>
of this being unsafe? Of being more safe than NSs whose names are in other TLDs?<br>
</blockquote>
<br></div>
Whatever the safety aspects (there are probably arguments both ways) it<br>
certainly isn't uncommon. Going by the delegation NS records, 57 out of<br>
323 TLDs have all NS records inside themselves. These include 51 ISO3166<br>
ccTLDs, 5 ASCII gTLDs (biz, mil, net, tel, travel) and [now!] just one<br>
IDN gTLD (the above).<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
Chris Thompson University of Cambridge Computing Service,<br>
Email: <a href="mailto:cet1@ucs.cam.ac.uk" target="_blank">cet1@ucs.cam.ac.uk</a> Roger Needham Building, 7 JJ Thomson Avenue,<br>
Phone: <a href="tel:%2B44%201223%20334715" value="+441223334715" target="_blank">+44 1223 334715</a> Cambridge CB3 0RB, United Kingdom.</font></span><div class="HOEnZb"><div class="h5"><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br> Jonathan
</div>