[dns-operations] EDNS and TLDs

[Mark Andrews]

In message <CAAiTEH9UCNw5hdWAW7brmT1eVL20+WqH25m2NWf3RzV5i4Nv4Q at mail.gmail.com>
, Matthew Pounsett writes:
> On 17 November 2016 at 11:49, Matthew Pounsett <matt at conundrum.com> wrote:
> 
> >
> >  I've always been a little annoyed that no "do not send updates" signal
> > was never considered when the UPDATE mechanism was codified.
> >
> > "... was ever considered..."

Well Apple registered a SRV record for UPDATE so that UPDATEs don't
need to go to the NS's.  In theory if the update client supports
the SRV record (there is a ticket to add this feature to nsupdate)
then there is a way to signal this.

dns-update is the registered string.

http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=53&page=4

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