[ietf-dkim] Zone Files

[william(at)elan.net]

On Fri, 8 Jun 2007, 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.
>
> The protocol can include these in a name space and instantly determine where 
> the domain ownership begins.

The closest thing you can do is talk gTLD and ccTLD into putting some
record at _xyz.TLD that tells root level of deligation for that TLD.
Unfortunetly cases like .US make it worth since there are multiple
deligation roots.

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

You haven't done it. I have - large database that is hard to maintain.
Here is one for well-known domain for example (which does both 2nd
and 3rd level deligation):

DoWhois_MainDomains(Buffer, Query, "whois.cira.ca", "", 6, "SUBDOMAIN:",
"on.ca, qc.ca, nl.ca, pe.ca, nt.ca, nu.ca, bc.ca, ab.ca, nb.ca, ns.ca, 
yk.ca, sk.ca, mb.ca", querylevel);

Here is another less well-known:

DoWhois_MainDomains(Buffer, Query, "whois.nic.hu", "", 13, "DOMAIN:",
"co.hu, 2000.hu, erotika.hu, jogasz.hu, sex.hu, video.hu, info.hu, agrar.hu, 
film.hu, konyvelo.hu, shop.hu, org.hu, bolt.hu, forum.hu, lakas.hu, suli.hu, 
priv.hu, casino.hu, games.hu, media.hu, szex.hu, sport.hu, city.hu, hotel.hu, 
news.hu, tozsde.hu, tm.hu, erotica.hu, ingatlan.hu, reklam.hu, utazas.hu", 
querylevel);

It goes like this for almost every large-enough TLD (for others I often
simply don't know).

-- 
William Leibzon
Elan Networks
william at elan.net