On 24 feb 2012, at 17:43, John C Klensin <john-ietf(_at_)jck(_dot_)com> wrote:
the number of folks who, for lots of reasons, haven't upgraded
from operating systems, resolvers, etc., that don't support
As I said, people disagree... ;-)
As far as I know, there is nothing in any of the operating systems you mention
that prohibits an application to send a random udp packet, and because of that
your application can include a resolver library.
What is a problem are the cases where DNS is not used at all at the end node,
but instead other name binding/lookup protocols combined with a firewall policy
that because of this can and is blocking udp+tcp/53 in various ways.
That said, I still ask when it is, in general, time to just move forward. I see
for example many other reasons why people should not use that old software. IE6
for example. Yes, economically constrained situations exists, but that problem
do not go away by having us not start using SRV or HTTP/1.1 or SNI or HTML5.0
or...pick your favourite. And with SPF, that is not used by the edge node
I am asking more generally why specifically this DNS issue is so stuck, because
I think that is unfair. We upgrade other protocols...
But my point is, people disagree. As we see here ;-)
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