Re: [FWP] Recursion, anyone?

["Abigail" <abigail@foad.org>]

On Thu, Apr 12, 2001 at 01:26:30PM +0100, pmh@edison.ioppublishing.com wrote:
> On Thu, 12 Apr 2001 08:50:02 -0300, Filipe Brandenburger wrote:
> > At 11:17 PM 11/04/2001 +0100, Ian Phillipps wrote:
> > > From RFC 1034:
> > >
> > ><domain> ::= <subdomain> | " "
> > ><subdomain> ::= <label> | <subdomain> "." <label>
> > ><label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
> > ><ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
> > ><let-dig-hyp> ::= <let-dig> | "-"
> > ><let-dig> ::= <letter> | <digit>
> > ><letter> ::= any one of the 52 alphabetic characters A through Z in
> > >     upper case and a through z in lower case
> > ><digit> ::= any one of the ten digits 0 through 9
> > >
> > >So, the answer that 'A--' is legal.
> > >And www.f--k.com exists, and for sale...
> > 
> > As I see by the definition of <label>, only names starting with a letter 
> > and ending with a letter or a digit are legal, so 'A--' is legal, but 
> > 'A--B' or 'A--0' are legal. I think I've seen some domain names starting 
> > with a number, but I should be wrong. Anyone ever seen one of these?
> 
> There are loads of them, including some with only numbers, like 10.am and www.31338.net.
> 
> As I said to Abigail when I forgot to reply to the group:
> This part of the RFC seems to be followed more in spirit than to the letter.
> Well, the spirit that says, "actually, just ignore this bit, and use what you
> like."


I think the spirit is "use at your own risk". I bet some DNS servers
out there refuse to resolve non-compliant names.

But how should www.31338.net ever notice some people can't get to it?
Mail to hostmaster@www.31338.net isn't likely to arrive when send by
the same people who can't go to www.31338.net.

And besides, 99% of the sites out there don't give a fuck if 20% of the
people can't read their site because they don't have the newest IE anyway.

It isn't that non-compliant domains are being used outside of the web craze.



Abigail

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