You can use System Manager to manage DNS/DDNS services.
More information
Enabling or disabling DNS and DDNS
You can use System Manager to enable or disable DNS on a storage system. After enabling DNS, you can enable DDNS.
Editing DNS and DDNS settings
You can maintain host information centrally using DNS. You can use System Manager to add or modify the DNS domain name of your storage system. You can also enable DDNS on your storage system to update the name server automatically in the DNS server.
DNS/DDNS Services window
The DNS/DDNS Services window enables you to view the current DNS and DDNS settings for your system.