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: ma...@isc.org
which explains domains like 3com.net. the trailing dot is not illegal. /bill