On Fri, Jun 22, 2018 at 5:13 PM, William A Rowe Jr <wr...@rowe-clan.net>

> On Fri, Jun 22, 2018 at 4:42 PM, Eric Covener <cove...@gmail.com> wrote:
>> > should have broken IDN (punycode) international domain names.
>> those are obviously dashes, not underscores, so not affected at all.
> That assertion was a bit extreme :) But on principal, underbars are not
> valid (internet) DNS, but seem widely deployed in the intranet, notably
> a certain M$ who has actively endorsed and promoted them to sysadmins.
> I'd say let them pass, in that it shouldn't matter if a_b isn't resolvable
> any more or less than axb is resolvable. There is no ambiguity in the
> designation that I'm aware of.

(Sub-delims have all sorts of problematic designations, we really want
to accept a "wildcard" '*' hostname? I'd suggest keep to the known
"unwise" exceptions, and leave it part of the "unsafe" protocol behavior.)

Reply via email to