continous DNS query to ROOT DNS server

[Chris Thompson]

On Apr 26 2011, Eivind Olsen wrote:

>Chris Buxton wrote:
>
>> Create RFC 1918 reverse zones for whatever parts of this address space
>> you're using.
>> Newer versions of BIND will do this automatically for you -- the zones
>> are created without content. What version of BIND are you using?
>
>Hm, anyone know which versions? The BIND 9.8 ARM has a section about
>built-in empty zones, where it for example says "In particular, these
>cover the reverse namespace for addresses from RFC 1918 and RFC 3330.",
>then goes on to list several zones which are _not_ what I normally think
>of when someone mention RFC 1918.

The text has been the same for several releases, and it is fairly likely
to lead to confusion:

| Named has some built-in empty zones (SOA and NS records only). These
| are for zones that should normally be answered locally and which queries
| should not be sent to the Internet's root servers. The official servers
| which cover these namespaces return NXDOMAIN responses to these queries.
| In particular, these cover the reverse namespace for addresses from
| RFC 1918 and RFC 3330. They also include the reverse namespace for
| IPv6 local address (locally assigned), IPv6 link local addresses,
| the IPv6 loopback address and the IPv6 unknown address.

Is it "the official servers which cover these namespaces" for the RFC 1918
addresses that return NXDOMAIN (true, the AS112 project), or the automatic
empty zones that do the same locally (false, even in 9.8.0, without source
modifications)? Referencing RFC 3330 muddies the issue even more, as most
of the addresses listed there, *except* the RFC 1918 ones, *are* covered
by automatic empty zones.

I think ISC need to do a bit of work on the documentation here.

-- 
Chris Thompson               University of Cambridge Computing Service,
Email: cet1 at ucs.cam.ac.uk    New Museums Site, Cambridge CB2 3QH,
Phone: +44 1223 334715       United Kingdom.