root and zone transfers

Mark Andrews marka at
Sat Sep 12 13:42:31 UTC 2009

In message <20090912082415.GA13105 at>, Matus UHLAR - fantomas writes:
> > On Freitag 11 September 2009 Matus UHLAR - fantomas wrote:
> > > - it's quite useless to cache the .arpa and since
> > > unlike other TLD's they are hierarchically organised so there won't
> > > be any valuable benefit from slaving them, only risks (see above).
> On 12.09.09 09:27, Michael Monnerie wrote:
> > Every other point is OK, but I don't understand this one. They are all 
> > hierarchical, what's the difference with
> while there are many manual mistypes in root and other domains, there are (ne
> arly) no
> mistypes in .arpa and domains since these domains are
> accessed by software and miskates here are unlikely to happen 
> (of course sw can have bugs but authors would soon notice it doesn't work).

Whether is useful or not depends on where you are in
the world and what the connectivity is like.  There was a time when
I would have recommended slaving the root and to every
Australian site.  When the one link connecting most of Australia
went down this sort of think kept a vast majority of the internal
communications within Australia working as you could find "au" and
you could do reverse lookups of the Australian address blocks.

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at

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