On Friday May 28, bobatk(_at_)exchange(_dot_)microsoft(_dot_)com wrote:
It occurred over lunch today to me that the placement of A records in
the www.domain.com convention in widespread use for naming web servers
faces (so far as I can naively tell) *exactly* the same issues regarding
wildcards as the deployment of TXT records in the contemplated
_ep.domain.com convention.
It's also the case the scales of use involved in the two designs are
quite comparable: www. is used for comparably many domains as we hope
_ep. would be. Certainly the scales are not far enough apart not to make
a qualitative difference.
I'm unaware of (though I'm naive on this point) any critical or show
stopper issues in big domain hosters etc regarding the difficulty in
wildcarding the www. convention for web servers.
For this reason (not to mention those mentioned by others) I'm thus lead
to believe that the issue of wildcarding we've been discussing is
actually not of any real significance.
But perhaps I just need to be better educated.
Bob
It's a good example, and I think you are absolutely right.
Given that a wildcard record:
*.example.com IN TXT "Some text"
will match
_ep.subdomain.example.com
just as easily as it matches
subdomain.example.com
I think wildcards are pretty much a non-issue.
NeilBrown