[ietf-dkim] Zone Files

[Steve Atkins]

On Jun 8, 2007, at 9:57 AM, Hector Santos wrote:

> Charles Lindsey wrote:
>
>>>
>>> Why not?
>> So you are expecting Nominet (the managers of the uk TLD, and of  
>> co.uk, org.uk, net.uk, etc under it) to administer the '_ssp.uk'  
>> domain on behalf of Demon and all the 99999 other *.co.uk domains  
>> that have been registered by the umpteen registrars licensed by  
>> Nominet?
>
> No. I was ignorant of ccTLDs. No longer. :-) I've done the  
> research. Now I am studying how the gTLD root server are related to  
> the ccTLD root servers.
>
>> The only way your scheme could possibly work is by invoking some  
>> Magic that tells you to look at sales._ssp.demon.co.uk, so that  
>> Demon get to manage their own policies. The only possible such  
>> Magic suggested so far is Doug Otis's global registry of  
>> registrable domains, or maybe some inventive examination of SOA  
>> records.
>
> Right. I don't see a reason why the protocol can not implement a  
> gTLD, ccTLD name space logic in order to find the level where the  
> domain ownership begins.

No, that's impossible in general.

I'll point you at us.com, uk.com and dyndns.org as some obvious examples
you should consider.

>
> The protocol can include these in a name space and instantly  
> determine where the domain ownership begins.

Actually, no, it can't. A third party cannot reliably identify the  
domain cut
associated with an administrative entity.

It can guess, and often be right, but that's all. Look at the gross  
hacks
in your typical "smart" whois client for an example of the hideousness
even the guessing involves.

>
> I don't see a problem programming for this.  Par for the course.
>

Yes, indeed. Par for the course.

Cheers,
   Steve