If you want to use custom Domain Name System (DNS) servers to resolve your domain name, you must first create your own DNS servers. This topic provides answers to frequently asked questions about custom DNS servers.
What is a custom DNS server?
A custom DNS server is a self-managed DNS server and provides the DNS resolution service. Professional technical skills are required to create custom DNS servers. If you do not have such skills, we recommend that you use the DNS service provided by your DNS service provider.
What are the naming conventions for a DNS server?
Enter the name of the custom DNS server, such as dns1.example.com or dns2.example.com.
If .cn domain names are used as DNS server names, fourth-level domain names are not supported.
How many DNS servers can I create?
You can create a maximum of 13 DNS servers. The actual number of DNS servers that you can create is determined by the domain name registry.
Do custom DNS servers support IPv6 addresses?
Yes, custom DNS servers support IPv6 addresses.
How many IP addresses can I configure for a DNS server?
You can configure 1 to 13 IP addresses for a DNS server. The actual number of IP addresses that you can configure for a DNS server is determined by the domain name registry.
A .cn domain name supports up to six custom DNS servers.
Can I change or delete a server name?
Yes, you can change or delete a server name. However, you must change or delete the server name on the backend server and update the related services. For example, if you change or delete a server name, you must update DNS records and restart related services to ensure that all related services and configurations are updated. You also need to make a backup plan for the modification to prevent service interruptions.
Can I change or delete the IP addresses of a DNS server?
Yes, you can change or delete the IP addresses of a DNS server. However, at least one IP address must be retained.
Does a custom DNS server take effect immediately after it is created?
No, a custom DNS server requires several minutes to take effect after it is created.
Can I delete a custom DNS server after it is created?
Yes, you can delete a custom DNS server after it is created. If you fail to delete a custom DNS server, contact technical support on the Smart Online page.