Start Zone Transfer

A zone transfer is a fundamental process for replicating DNS records from a primary DNS server to one or more secondary servers. This process ensures redundancy, enhances fault tolerance, and improves DNS resolution performance across distributed networks.

Creating a zone transfer from a primary to a secondary zone involves configuring authoritative DNS servers to synchronize zone data securely. The primary server maintains the original zone file; the secondary servers obtain and periodically update their copies through the standard AXFR zone transfer protocol.

Prerequisites:

  • Cloud DNS relies on the following Anycast addresses to send DNS notification messages. Ensure you whitelist the following IP addresses:

  • IPv4: 212.227.123.25

  • IPv6: 2001:8d8:fe:53::5cd:25

  • Ensure that port 53 is open for both TCP and UDP connections.

To begin zone transfer, follow these steps:

1. In the DCD, go to Menu > Network Services > Cloud DNS > Public zones tab.

2. Select Secondary Zones from the drop-down list.

Select secondary zones

Info: The Public zones section displays the zones if you have already created them. Select Show secondary zones to view secondary zones. This option only appears if you have created secondary zones but have not configured primary zones.

Show secondary zones

3. Select the zone to initiate the transfer process.

4. Select Start zone transfer.

Select zone transfer

Alternatively, you can begin zone transfer using the Start zone transfer option in either the ACTIONS column or the Details & Records window.

5. Select Start transfer in the Start zone transfer view to begin the process.

Confirm zone transfer

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