[dns-operations] delegation-only: How useful?

[Mark Andrews]

> 
> On 20 Aug 2008, at 03:28, Florian Weimer wrote:
> 
> > Even .COM and .NET are by no means delegation-only.
> 
> Really?
> 
> > Several ccTLDs which are not listed in ISC's root-delegation-only
> > exclude list have _nicname._tcp/IN/SRV entries to help WHOIS clients.
> 
> I had not heard of that. That's fun.
> 
> (Some of those records seem to have problems, unless I'm confused; see  
> AF, GR, VG below. Although as people might have noticed by now I am a  
> fan of the kind of signalling that I might infer about AF and GR :-)
> 
> A draft codifying the use of _nicname._tcp.${zone} SRV records for  
> this purpose seems like it might be quick, easy and useful.

	The draft is actually required as whois predates SRV.

	All these operators are deliberately mis-using SRV.

	The draft could actually note that delegating _tcp.TLD will
	help with it's adoption as it won't run foul of delegation
	only checks in resolvers.

> Joe
> 
> [monster:~]% for n in $(awk '/^[A-Z]/ { print $1; }' /usr/share/misc/ 
> iso3166)
> for> do
> for> dig _nicname._tcp.${n} SRV | grep -q 'ANSWER: 0' || \
> for> ( echo -n "${n}: "; dig _nicname._tcp.${n} SRV +short )
> for> done
> AF: 0 0 0 .
> AU: 0 0 43 whois.ausregistry.com.au.
> AT: 10 0 43 whois.nic.at.
> BG: 0 0 43 whois.register.bg.
> CL: 10 0 43 whois.nic.cl.
> DK: 0 0 43 whois.dk-hostmaster.dk.
> FR: 0 0 43 whois.nic.fr.
> DE: 0 0 43 whois.denic.de.
> GR: 0 0 0 .
> HU: 0 0 43 whois.nic.hu.
> IS: 0 0 43 whois.isnic.is.
> IE: 10 0 43 whois.domainregistry.ie.
> JE: 0 0 43 whois.channelisles.net.
> LA: 0 0 43 whois.nic.la.
> LI: 0 1 43 whois.nic.ch.
> LU: 0 0 43 whois.dns.lu.
> MX: 0 0 43 whois.nic.mx.
> NL: 0 0 43 whois.domain-registry.nl.
> NO: 0 0 43 whois.norid.no.
> RE: 0 0 43 whois.nic.fr.
> SI: 10 0 43 whois.arnes.si.
> SE: 0 0 43 whois.nic-se.se.
> CH: 0 1 43 whois.nic.ch.
> US: 0 0 43 whois.nic.us.
> VG: pjn.qsrch.net.
> [monster:~]%
> 
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org