On 6/25/2018 11:13 AM, Ray Bellis wrote:
On 25/06/2018 22:08, John Levine wrote:
One minor point in attrleaf, is whether to mention the poor
interactions between _names and wildcards. One issue is that
_blah.*.example doesn't work, the other is that *.example will match
underscored names which can be surprising if it has RRs of a type that
might be underscored, notably TXT.
Isn't the issue with wildcards already well addressed in the IAB
document on extending the DNS ? (RFC 5507).
Yes, but...
This is certainly a universal issue with _names and it's one that seems
not to be obvious to many folk. So while the mathematics of purity
should be satisfied that the issue is document somewhere, the
probabilities of reader psychology might encourage some judicious
redundancy. And RFCs nicely permit pedagogy along with specification.
I'm feeling lazy. Care to suggest text to add and its location in
-attrleaf, John?
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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