On topic of domains

Mark Andrews marka at isc.org
Thu Jul 11 22:45:50 UTC 2013

In message <krmkg2$flc$1 at 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

        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

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org

More information about the NANOG mailing list