Re: Mass ipv6 lookups
On Fri, Sep 27, 2002 at 09:23:31AM -0500, Daniel Taylor wrote:
> On Fri, 27 Sep 2002, Wichert Akkerman wrote:
>
> > Previously Ramon Kagan wrote:
> > > Just so you know, I have found that anything TCP wrapped (ssh, ftp...),
> > > smtp, http, all now complete ipv6 lookups. This in some ways is I dare
> > > say a Microsoft tactic. Shove it down my throat until I concede.
> >
> > I would say it is a bug, and if you file a bugreport on it it should be
> > fixed.
> >
> Well, for those preferring to run over IPv6 it does make sense to
> do the AAAA lookup first. If there is no AAAA record, then an A
> record lookup occurs.
Some clients waste time by trying AAAA before A. Note that this issue could
easily have been eliminated: the DNS protocol can handle both 4-byte A
records and 16-byte A records.
-- DJB (http://cr.yp.to/proto/ipv6.html)
DJB's page suggests leaving IPv4 as the default, but supporting IPv6 as a
fallback, which will be useful once everything else stops using v4. This is
not useful for people testing IPv6 software to make sure it works right,
though.
Anyone have any thoughts on how Debian can help to bring the Internet
toward the critical mass necessary for a widespread switch to v6? Building
v6 support into packages in as a fallback, such that everything works with
no problem on a v4 only machine, and on a machine with a v4/v6 kernel but
with v6 setup not configured would be a Good Thing.
Most stuff should try A before AAAA, unless you configure it to use v6.
>
> I don't see this as a bug, and yes, it is shoving it down your throat
> until you concede. Any protocol change ends up doing the same thing
> or it *never*happens*.
--
#define X(x,y) x##y
Peter Cordes ; e-mail: X(peter@llama.nslug. , ns.ca)
"The gods confound the man who first found out how to distinguish the hours!
Confound him, too, who in this place set up a sundial, to cut and hack
my day so wretchedly into small pieces!" -- Plautus, 200 BC
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