Bare TLD resolutions

Owen DeLong owen at delong.com
Thu Sep 18 01:20:11 UTC 2014


On Sep 17, 2014, at 6:01 PM, Jimmy Hess <mysidia at gmail.com> wrote:

> On Wed, Sep 17, 2014 at 11:09 AM, Jay Ashworth <jra at baylink.com> wrote:
> 
>> The latter would seem to be avoidable by making sure that *DNS resolution
>> of bare TLDs always returns NXDOMAIN*.
> [snip]
> 
> Not  NXDOMAIN.    When  TLD.  is looked up,  they should always return NOERROR.

Well… A TLD which does not exist should return NXDOMAIN. For example, if I do a query for .NONEXISTANTTLD.,
then I should get NXDOMAIN…

Owens-MacBook-Pro:Downloads owendelong$ dig NONEXISTANTTLD.

; <<>> DiG 9.8.3-P1 <<>> NONEXISTANTTLD.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 64254
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;NONEXISTANTTLD.			IN	A

;; AUTHORITY SECTION:
.			3600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2014091701 1800 900 604800 86400

But for any TLD which exists, yes.

Owen



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