Re: Validating string for FDQN

From	Nobody <nobody@nowhere.com>
Subject	Re: Validating string for FDQN
Date	2011-06-07 21:46 +0100
Message-Id	<pan.2011.06.07.20.45.52.953000@nowhere.com>
Newsgroups	comp.lang.python
References	<d30814aa-494f-457f-8a56-5ebe802f4725@z7g2000prh.googlegroups.com> <pan.2011.06.07.05.23.21.453000@nowhere.com> <mailman.2521.1307425928.9059.python-list@python.org>
Organization	Zen Internet

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On Tue, 07 Jun 2011 15:52:05 +1000, Chris Angelico wrote:

>> [1] If a hostname ends with a dot, it's fully qualified.
> 
> Outside of BIND files, when do you ever see a name that actually ends
> with a dot?

Whenever it is entered that way.

This may be necessary on complex networks with local subdomains, i.e.
where resolv.conf has "options ndots:2". E.g. "foo.it" might resolve to
"foo.it.bar.edu" (in bar.edu's IT department's subdomain), requiring a
trailing dot if you want the Italian site "foo.it".

The canonical real-world example of this used to be foo.cs resolving to
foo.cs.berkeley.edu (UCB Comp. Sci. department), but ever since .cs split
into .cz and .sk it's no longer ambiguous.

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Thread

Validating string for FDQN Eric <eric.wong.t@gmail.com> - 2011-06-06 17:40 -0700
  Re: Validating string for FDQN harrismh777 <harrismh777@charter.net> - 2011-06-06 20:55 -0500
  Re: Validating string for FDQN Chris Angelico <rosuav@gmail.com> - 2011-06-07 12:50 +1000
  Re: Validating string for FDQN Philip Semanchuk <philip@semanchuk.com> - 2011-06-06 23:10 -0400
  Re: Validating string for FDQN Nobody <nobody@nowhere.com> - 2011-06-07 06:23 +0100
    Re: Validating string for FDQN Chris Angelico <rosuav@gmail.com> - 2011-06-07 15:52 +1000
      Re: Validating string for FDQN Chris Torek <nospam@torek.net> - 2011-06-07 06:20 +0000
      Re: Validating string for FDQN Nobody <nobody@nowhere.com> - 2011-06-07 21:46 +0100

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