[dns-operations] Introducing CNAME Flattening: RFC-Compliant CNAMEs at a Domain's Root

Mark Andrews marka at isc.org
Sat Apr 5 03:41:22 UTC 2014

In message <533EC5C4.4050704 at tiggee.com>, David Miller writes:
> This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
> On 04/04/2014 06:54 AM, Mark Andrews wrote:
> >
> > 	Or one can add SRV or some other record that does the name
> > 	to server mapping and not have to do all this behind the
> > 	scenes stuff.
> One would need to add several SRV records, if the host provided several
> services.  One would also need to recode all of the applications
> accessing these services to use SRV records (if they don't already).

Yep and if we had done that in 1999 all the browers we use today would
support it.  Browers are regularly updated.  

> > 	It's not like MX records didn't exist when the web was
> > 	created or that we weren't adding new records to the DNS.
> We don't want to add a new record type for every different
> service/application do we?  [or am I misunderstanding your point here?]

Why not?  HTTP is often wildarded so a type is appropriate for it.

> > 	Indirection to reach a server was a known thing and it was
> > 	different to a alias.
> >
> > 	As for DNSSEC, you sign on the fly for this sort of solution.
> Signing "on the fly" is one solution.
> > 	Mark
> >
> -DMM

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org

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