On Fri, Jun 22, 2018 at 5:13 PM, William A Rowe Jr <[email protected]> wrote:
> On Fri, Jun 22, 2018 at 4:42 PM, Eric Covener <[email protected]> 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.)
