Re: Should a nameserver know about itself?

[Nathan Jones <[e-mail]>]

On Wed, May 09, 2001 at 04:33:11PM +1000, Bruce Campbell wrote:
>Is the assumption that a nameserver should have information about itself
>correct?

I'm not aware of such a requirement, even though it sounds like a
good thing for a host to know.

Here's a scenario that I think is valid, in which a nameserver
wouldn't know about itself:

Foo use ns1 and ns2 for their own domain, but use dnshost1 and
dnshost2 for their customers.

foo.example.            IN  NS   ns1.foo.example.
foo.example.            IN  NS   ns2.foo.example.
ns1.foo.example.        IN  A    192.168.1.1
ns2.foo.example.        IN  A    192.168.1.2
dnshost1.foo.example.   IN  A    192.168.2.3
dnshost2.foo.example.   IN  A    192.168.2.4

Bar is a customer of Foo:

bar.example.       IN  NS   dnshost1.foo.example.
bar.example.       IN  NS   dnshost2.foo.example.

dnshost1 and dnshost2 are authoritative only nameservers
(no recursion).

When a delegation request is lodged for bar.example., your script
queries dnshost1 for it's own A record and gets a referral to either
the root servers or the example. servers, since it does not host
foo.example. and does not offer recursive resolution.

--
nathanj