Another field in the DNS
Mark_Andrews at isc.org
Tue Mar 3 22:25:45 CET 2009
In message <20090303105132.20169.qmail at simone.iecc.com>, John Levine writes:
> >I just tried IbM.com and got IbM.com back in the question section, and
> >pointers to that same name in the answer section. If a server wanted
> >to send back an answer with different upper/lower casing, would it be
> >wise to do that in the answer section? Or would it be better to do it
> >in the additional section?
> Don't change the case in the answer -- people have observed that DNS
> servers consistently preserve the case of the request in the response,
> and are now using randomized case in DNS lookups as a heuristic to
> deter poisoning attacks.
That is the QUESTION section. The ANSWER section is fair game.
> I don't have an opinion about the wisdom of adding extra stuff to the
> additional section, although I share concerns about how well existing
> DNS lookup and cache software would handle it.
> John Levine, johnl at iecc.com, Primary Perpetrator of "The Internet for Dummies
> Information Superhighwayman wanna-be, http://www.johnlevine.com, ex-Mayor
> "More Wiener schnitzel, please", said Tom, revealingly.
> Idna-update mailing list
> Idna-update at alvestrand.no
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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