DNS - Server (nameserver)

1 - About

A nameserver is a server (host) where a name service (generally DNS) program is running.

A name server is organized in namespace information unit called ZONEs that manages DNS information for an apex domain. They may be also an AUTHORITY for one or more zone.

3 - Management

3.1 - Set

You set your nameserver by updating the NS record

3.2 - Update

Before updating your DNS server when you want to move one's domain from one registrar to another., you can check that the DNS server have a good configuration.

This is called an undelegated domain test (ie when this is not your actual public/published DNS).

For example, if you want to move your zone example.com from the nameserver “ns.example.com” to the nameserver “ns.example.org”.

3.3 - Check

The https://zonemaster.fr/ of AFNIC can check the configuration of the primary and secondary DNS server:

  • actual
  • or before switching to them (option)

3.4 - List

The nameserver are designed by the NS record that you can query

For instance:

nslookup -type=NS example.com 

dig -t ns DOMAIN

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