In message <alpine.bsf.2.00.1107042329060.89...@joyce.lan>, "John R. Levine" wri
tes:
> > The naive approach of reversing the address, converting to nibbles
> > and appending a suffix won't scale.
> >
> > For IPv6 if you did the reverse of /48, /52, /56, /60 and /64
> > prefixes, which matches delegation patterns along with NXDOMAIN
> > synthesis, you would still be fine.  You stop the search on NXDOMAIN
> > or data with perhaps a new value which says to continue searching
> > for white listed records.  One could even start with /32 if one is
> > worried about spammers pretending to be ISPs.
> 
> I don't necessarily disagree, but now you've just upgraded the DNS 
> (NXDOMAIN synthesis is far from universal)

No, just application smarts is needed.  The DNS already supports this
and it has been used for over 1/2 a decade now.

> and layered a probing protocol on top of it.  We can have a theological
> argument about whether that counts as "using the DNS".
>
> R's,
> John
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: ma...@isc.org
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