[AusNOG] Are domain name server pointers reliant on registrar name server?

James Deck jdeck at clevvi.com.au
Sun Oct 28 23:10:02 EST 2018 

Thanks, Mal. My syntax could have been clearer. Probably should have said, "The list of name servers that are authoritative for your domain are provided by parent DNS servers, such as the registry operator (which in turn are provided by the root servers)."

The original post was asking if the registrar is relied upon here (and the answer is no).

Regarding the IANA link - the below servers will resolve .au at the 1st level:

b.au
a.au
v.au
u.au
s.au
q.au
r.au
c.au
d.au

2nd level .au domains are provided by a narrower set of servers. For example, .com.au is provided by:

s.au
q.au
t.au
r.au

A practical example of this recursion can be seen using dig +trace:

; <<>> DiG 9.10.6 <<>> +trace clevvi.com.au
;; global options: +cmd
.   514209 IN NS g.root-servers.net.
.   514209 IN NS l.root-servers.net.
.   514209 IN NS k.root-servers.net.
.   514209 IN NS j.root-servers.net.
.   514209 IN NS h.root-servers.net.
.   514209 IN NS a.root-servers.net.
.   514209 IN NS d.root-servers.net.
.   514209 IN NS f.root-servers.net.
.   514209 IN NS e.root-servers.net.
.   514209 IN NS c.root-servers.net.
.   514209 IN NS m.root-servers.net.
.   514209 IN NS b.root-servers.net.
.   514209 IN NS i.root-servers.net.
.   514209 IN NS l.root-servers.net.
.   514209 IN NS k.root-servers.net.
.   514209 IN NS j.root-servers.net.
.   514209 IN NS h.root-servers.net.
.   514209 IN NS a.root-servers.net.
.   514209 IN NS d.root-servers.net.
.   514209 IN NS f.root-servers.net.
.   514209 IN NS e.root-servers.net.
.   514209 IN NS c.root-servers.net.
.   514209 IN NS m.root-servers.net.
.   514209 IN NS b.root-servers.net.
.   514209 IN NS i.root-servers.net.
.   514209 IN NS g.root-servers.net.
;; Received 397 bytes from 192.168.11.1#53(192.168.11.1) in 155 ms

au.   172800 IN NS a.au.
au.   172800 IN NS t.au.
au.   172800 IN NS c.au.
au.   172800 IN NS d.au.
au.   172800 IN NS u.au.
au.   172800 IN NS s.au.
au.   172800 IN NS v.au.
au.   172800 IN NS r.au.
au.   172800 IN NS b.au.
au.   172800 IN NS q.au.
au.   86400 IN DS 35197 8 2 9EDA3EC27D09500AD52C510A86BCB1CD7C364444E3AB04B6EBB76378 378A5C87
au.   86400 IN DS 35197 8 1 DF3D2F347C04EAE8FFAD6EEA8BD52FD134088969
au.   86400 IN RRSIG DS 8 1 86400 20181110050000 20181028040000 2134 . v6entwVq3hzXYBm6GjGlbuUkqWiIK/k/GjTFT0Ww35HW1sNhXqiabnm1 0He9PJZwmN783weKHEKTZRfriUHRT0B44NRqZCxifUpgnY6v458v3T1J s3oerpLpD4urZKL1d8SgUEzb50LPVFY4kSZjwJ57fcHZm960zbVWalHS I75pskSg27t0eyk57If5QMfDOQ8ox7gJ3wSVNNQ4HiBIk7KDj0xzQ2of VCYlY38wc/hw7YFkfCOAzIq7uJ3pLIyXsUrnnjotE6a8aHGhPdJY0veW NgBbIjAu37CTZCYT/TpknjfUIo8K3hfL0K9tb67KRqpLdVuqAPE3hMbN shySlg==
;; Received 985 bytes from 199.9.14.201#53(b.root-servers.net) in 218 ms

com.au.   86400 IN NS s.au.
com.au.   86400 IN NS q.au.
com.au.   86400 IN NS t.au.
com.au.   86400 IN NS r.au.
com.au.   86400 IN DS 14185 8 1 2F03242E417A9A01F7E9139F605B48CC38A2D454
com.au.   86400 IN DS 14185 8 2 9394BEA09F5EBD91384AA5CD0397A6B395FD2B299C7912979243CD68 9BA387DB
com.au.   86400 IN RRSIG DS 8 2 86400 20190125205724 20181027204634 2806 au. rHe2S+fT44jk8dyHFHp8eGPu+y0mhvoiMHEZ2+fTksHaaq8P3lSFzM5E mPTTX8alvG00to8kV73visSdaniB9aNzSCT/kdNu/Ly+SPk+k4pPOHB0 enQAUU+vYYiGDvOL0A0sbPhGJRO7f5gBlMUq5rOC2UAr1+/ydONtb9qg blNzihKUPnPp4O3VRQvm2tS8Aplq13/xbilbA5IsP7/OKg==
;; Received 400 bytes from 162.159.25.38#53(d.au) in 45 ms

clevvi.com.au.  900 IN NS bella.ns.cloudflare.com.
clevvi.com.au.  900 IN NS oswald.ns.cloudflare.com.
clevvi.com.au.  900 IN DS 2371 13 2 35DB5C342FFDFD4B0CADF98022D74E41A4CC2543BDB9A981F27574F3 659F6729
clevvi.com.au.  900 IN RRSIG DS 8 3 900 20181115151738 20181025141738 14968 com.au. UcsGcFhCMtVMJSNBXOoZ9NSEa0W4KttcVJem5dOQm1LVk3svXNSalpKS ON0Szj1CHEX/uPSPR1QmXgqOV/r5nY8Kvbaj7HvW3XVJ8dW7p8oqgdq7 AD5EICDJdTkmn92B9QfrJh2b/1t5DgkzFd1PcV/E3DI98qR6KrG6ZXeM vUY=
;; Received 314 bytes from 65.22.196.1#53(q.au) in 57 ms

clevvi.com.au.  900 IN A 104.25.130.103
clevvi.com.au.  900 IN A 104.25.129.103
clevvi.com.au.  900 IN RRSIG A 13 3 900 20181029130048 20181027110048 35273 clevvi.com.au. D43GkW+W0YwKnvrBfe5tZvYaKkt4Ka3Q7mR2MaSdZUhKKAzTh8XUDHu4 vfaOTrylLnEMlfQ85rUrMLToBTpxtA==
;; Received 183 bytes from 173.245.59.218#53(oswald.ns.cloudflare.com) in 33 ms

________________________________

Kind Regards,
James Deck
Managing Director
Clevvi - Formerly 1300 Web Pro
p1300 932 776
ejdeck at clevvi.com.au
wclevvi.com.au
aUnit 22, 489 South Street, Toowoomba 4350
Unit 14, 17 Karp Court, Bundall 4217
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From: Mal <malz at jetlan.com>
Sent: Sunday, 28 October 2018 9:57 PM
To: James Deck; Matt Selbst
Cc: AusNOG at lists.ausnog.net
Subject: Re: [AusNOG] Are domain name server pointers reliant on registrar name server?


On 28/10/2018 9:25 PM, James Deck wrote:
>
> Authoritative name servers are provided by DNS services managed by the registry operator (and not the registrar).
>

Not correct.  Anyone can run there own Authoritative name servers for a
domain.  This may be you OR your registry.

The Nameserver data configured for your domain is used by the domain
registry to populate the servers delegated to the applicable TLD.

example:
>
https://www.iana.org/domains/root/db/au.html

You are reliant on these TLD servers, so a query about your domain can
be passed to the correct Authoritative NS.

Mal


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