DNS
dig
# see which nameservers are involved
dig weyrich.dev +trace
# see information on domain
dig weyrich.dev +all
# use specific dns to resolve url
dig @ns1-09.azure-dns.com bla.example.cloud
DNS Zones
Is part of a dns tree e.g. bla.examples.com and blubb.example.com can be two different zones.
record types
- NS: Name Server Resource Record
CNAME vs ALIAS
apex domain vs subdomain
An apex domain also called root domain: weyrich.dev Subdomain: bla.weyrich.dev
hint: setting ns
When dig says BAD (HORIZONTAL) REFERRAL you probably created a loop in a ns entry. Check if you used the correct address for nameservers of the subdomain. In doubt double check the NS addresses.
E.g. azure uses different nameserver and randomly assign four to one dns zone.