Re: Update of RFC 2606 based on the recent ICANN changes ?

Ted Faber <faber@ISI.EDU> Tue, 08 July 2008 01:34 UTC

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Date: Mon, 7 Jul 2008 18:32:42 -0700
From: Ted Faber <faber@ISI.EDU>
To: Mark Andrews <Mark_Andrews@isc.org>
Subject: Re: Update of RFC 2606 based on the recent ICANN changes ?
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On Tue, Jul 08, 2008 at 10:18:25AM +1000, Mark Andrews wrote:
> > That's at least as reliable as my (multi-dotted) home domain. :-)
> > 
> > I'm not sure what's not to like here.  But then again, I may be blind.
> 
> 	The point is that it is NOT reliable.  Whether it works
> 	depends apon what names are matched in the search list.  It
> 	does work for some people some of the time.  It does not
> 	work for all of the world all of the time.  "hk" is not
> 	globally unique.

That statement is also true for hk.com, ibm.com, google.com, or any
other relative DNS name.

The site-dependent interpretation of the name is determined not by the
presence of dot within the name but its absence from the end.  "hk." is
as global as "hk.com." with respect to the search list; "hk" and
"hk.com" are both relative names and their resolution is resolver
dependent.

I don't buy "unreliable" as a diagnosis for that state of affairs.  "hk"
operates exactly as any other DNS name with respect to search path.  An
incautious user or clever DNS administrator can create a confusing state
of affairs with or without the interior dot.

(As Bill Manning hinted, there may be other parts of the resolution code
that are less reliable for names without a dot in them.  That I might
buy as an argument for unreliability). 

If you'd like to argue something more subjective like "confusing" or
even "misleading," you'll find no resistance from me.

-- 
Ted Faber
http://www.isi.edu/~faber           PGP: http://www.isi.edu/~faber/pubkeys.asc
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