Re: [idn] hostname history hell

["Eric A. Hall" <ehall@ehsco.com>]

John C Klensin wrote:

> On that basis, my inclination would be to:
> 
>         * continue to prohibit leading (or trailing) hyphens

agree

>         * continue to prohibit all spacing characters
> 
>         * continue to prohibit all punctuation characters except
>         for that hyphen and the label-separating period (full
>         stop, ".")

ASCII versions of these are already prohibited by nameprep. Look-alikes
from other ranges should be prohibited to eliminate security problems
which would arise from purposefully misleading domain names.

>         * prohibit, in the spirit of the hostname rules, all
>         symbol and drawing characters

I'm completely neutral on this range but your arguments make sense.

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/