[dns-operations] I missed the announcement: .ARPA has beendeleted

[Lutz Donnerhacke]

* Crist Clark wrote:
> So my point was, is there any way to get back an SOA for "." in
> an NXDOMAIN response if the TLD of the QNAME exists?

Yes, there is. Assume the QNAME to be a CNAME (or label below a DNAME).
Then the whole response deals with the referred QNAME, not with the original
one. So if the root server is also responsible for the original QNAME, it
will respond authoritivly with the data of the referred one.

Example:

;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 46545
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.uit.int.			IN	A

;; ANSWER SECTION:
www.uit.int.		100	IN	CNAME	www.it.uint.

;; AUTHORITY SECTION:
.			86400	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2010021601 1800 900 604800 86400

;; Query time: 125 msec
;; SERVER: 2001:503:ba3e::2:30#53(2001:503:ba3e::2:30)
;; WHEN: Tue Feb 16 23:59:06 2010