How does registerdns work?

When you create a new server or change a server’s IP address and then run “ipconfig /registerdns”, how do the dns updates get to the dns server?

  1. The host sends a standard query to the primary dns server of the host asking for the SOA record for the FQDN of the host.
  2. The dns server will reply with the SOA record.
  3. The host sends a Dynamic update request to the SOA with the FQDN of the host, the address and the TTL.
  4. The SOA server will reply with the dynamic update request and the response from the update.
  5. The hosts sends a standard query to the primary dns server of the host asking for the SOA record for the reverse lookup zone of the host address.
  6. The dns server will reply with the SOA record for the reverse lookup zone.
  7. The host sends a Dynamic update request to the SOA with the FQDN of the host address and the TTL.
  8. The SOA server will reply with the dynamic update request and the response from the update.

Glossary

FQDN – Fully Qualified Domain Name
SOA – Start Of Authority
TTL – Time To Live

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