On 6/7/21 6:49 AM, Tim via users wrote:
On Sun, 2021-06-06 at 11:54 -0700, Jack Craig wrote:
something i dont get, if my registrar provides glue references for
primary & secondary domain dns servers, what purpose is served by
anything in my host's named.conf (et al) having any reference to my
domain if it's not accessible/useful?
i had thought that i should provide the primary server and my hosting
service provided secondary, but that leaves only the secondary os i
have only 1 responding
The internet, at large, will always use your primary server.
<snip/>
Hi Tim,
Are you sure about that? If I query the gtld-servers.net. for my
domains I always receive my two nameservers but they are in random
order. Typically the first record received is used for a search
followed by the second record received. In that sense, the first record
received is primary in the search order, the next, secondary, and so on.
Since they arrive in a random order there is no such thing as a fixed
primary or secondary. A dnsadmin may refer to the server they manage as
primary, but that is primary only to the dnsadmin for referential purposes.
To the best of my knowledge the SOA contains the name of the AXFR server
(the master or primary source for zone data) and recipients of the zone
data are referred to as clients or secondaries.
Perhaps a lot of the confusion comes from the dual uses of the term:
primary in search order (which is random)
primary source for zone data (which is fixed by an SOA)
To make matters more confusing there are more complex setups where the
zone masters are also clients making them both primary and secondary.
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