[164437] in North American Network Operators' Group
Re: On topic of domains
daemon@ATHENA.MIT.EDU (bmanning@karoshi.com)
Thu Jul 11 19:03:19 2013
Date: Thu, 11 Jul 2013 22:58:48 +0000
From: bmanning@karoshi.com
To: Mark Andrews <marka@isc.org>
In-Reply-To: <20130711224552.7630137352F2@drugs.dv.isc.org>
Cc: nanog@nanog.org, Chris Hills <chaz@chaz6.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Jul 12, 2013 at 08:45:50AM +1000, Mark Andrews wrote:
>
> In message <krmkg2$flc$1@ger.gmane.org>, Chris Hills writes:
> > On 11/07/2013 15:27, Jon Mitchell wrote:
> > >
> > > After .nyc thread, thought this IAB announcement may be of interest.
> > >
> > > http://www.iab.org/documents/correspondence-reports-documents/2013-2/iab-st
> > atement-dotless-domains-considered-harmful/
> > >
> > > -Jon
> > >
> >
> > Whilst I am not a fan of dotless domains, as long as one uses the fully
> > qualified domain name (e.g. http://ac./), there should not be any
> > trouble using it in any sane software. It seems that most people aren't
> > aware these days that a fqdn includes the trailing period (by definition).
>
> No it does not. Period at the end is a local convention to stop
> searching on some platforms. It is not syntactically legal. Note
> the words 'a sequence of domain labels separated by "."'. Periods
> at the end are NOT legal.
>
> RFC 1738
>
> host
> The fully qualified domain name of a network host, or its IP
> address as a set of four decimal digit groups separated by
> ".". Fully qualified domain names take the form as described
> in Section 3.5 of RFC 1034 [13] and Section 2.1 of RFC 1123
> [5]: a sequence of domain labels separated by ".", each domain
> label starting and ending with an alphanumerical character and
> possibly also containing "-" characters. The rightmost domain
> label will never start with a digit, though, which
> syntactically distinguishes all domain names from the IP
> addresses.
>
> Mark
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742 INTERNET: marka@isc.org
which explains domains like 3com.net.
the trailing dot is not illegal.
/bill
