Secondary service means provision of four secondary DNS servers located in Russia and Europe.
For proper functioning of the service you need to:
2. Set up primary and secondary DNS servers.
Benefits of the DNS Secondary service
faster response time of resources thanks to Anycast technology;
protection of domain names' resource records against DDoS attacks;
guaranteed availability of DNS zones: when primary DNS servers are unavailable, queries are automatically processed by Secondary DNS.
set up the service by listing up to 9 primary DNS servers;
authorize specific IP addresses to receive zone transfers.