Steve Atkins wrote:
Yes. Wildcards don't actually exist in DNS. The behavior
being discussed here is an implementation detail of one
(commonly used) authoritative server[1], though other
servers often have similar functionality, often mostly
compatible.
Steve,
Please excuse any perceived ignorance. Maybe I am being to technical
here, and I am not a DNS administrator but STD 13, has specific and
clear information about wildcards:
4.3.3. Wildcards
In the previous algorithm, special treatment was given to RRs
with owner names starting with the label "*". Such RRs are
called wildcards. Wildcard RRs can be thought of as instructions
for synthesizing RRs. When the appropriate conditions are met,
the name server creates RRs with an owner name equal to the query
name and contents taken from the wildcard RRs.
So I am not sure what it meant by "Wildcards don't actually exist in
DNS."
It seems you are saying since one server had offered it, and other
followed, that it been "kludged" in and now a common behavior but its
not actually part of the specification, therefore unreliable?
Seems pretty clear in STD 13.
What am I missing here?
--
Sincerely
Hector Santos, CTO
http://www.santronics.com
http://santronics.blogspot.com
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