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
