[80921] in North American Network Operators' Group
Re: Underscores in host names
daemon@ATHENA.MIT.EDU (Eric A. Hall)
Wed May 18 18:30:02 2005
Date: Wed, 18 May 2005 18:29:39 -0400
From: "Eric A. Hall" <ehall@ehsco.com>
To: Paul Vixie <vixie@vix.com>
Cc: nanog@merit.edu
In-Reply-To: <g364xgi4nv.fsf@sa.vix.com>
Errors-To: owner-nanog@merit.edu
Paul Vixie wrote:
> putting these checks in for master zones, slave zones, and response
> data was a significant over-reach on my part. THAT is what i'm
> apologizing for here. (and THAT is what CERT had asked me to do, since
> changing gethostbyaddr() would not, by itself, have protected Sendmail
> from newlines in its qf* files.)
Alright then. Personally I've found them useful at different times in
different places but that's some hair-splitting neither of us is
particularly interested in.
> just because you own an A RR doesn't make you a hostname.
>
> just because you're pointed to by an MX RR doesn't make you a mailname.
>
> (what a relief to finally be able to say that.)
At the risk of hair-splitting that I've already disclaimed, I'll halfway
agree (a host that doesn't accept connections arguably isn't a host) and
halfway disagree (the target of an MX must be a valid hostname). To ensure
that this thread dies now, I'll point out that I categorized some of this
as part of my second stab at the great white whale of i18n DNS [see
http://www.ehsco.com/misc/I-Ds/draft-hall-dns-datatypes-00.txt which
ensures nobody comes back]
--
Eric A. Hall http://www.ehsco.com/
Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
