Multi-AZ Disaster Tolerance, Nearby Response

Take the www.example.com domain for a tenant for example. The backend server group associated with this domain can be deployed across AZs, achieving AZ-level high availability of domain resolution service.

The specific implementation is shown in the following figure: DNS resolution servers are deployed in a clustered manner, and DNS servers in the same AZ as the Client will respond to DNS queries first. When the DNS server in AZ1 fails, the DNS queries will automatically be handled by the DNS server in AZ2.

High Performance

eSurfing Cloud Intranet DNS can simultaneously support bare metal and virtual machine deployments. Its high performance and powerful processing capabilities enable it to meet the needs of large-scale application scenarios. It also supports a maximum QPS of over 20 million.

The domain resolution service of eSurfing Cloud has network disaster tolerance and horizontal scalability, enabling network expansion without loss. It ensures high availability and stability even in the face of network failures or high loads.

Security and Reliability

Intranet domain names are valid domain names within the cloud intranet, only effective within the associated VPC, and cannot be attacked by the Internet. This effectively protects against external attacks and resolution hijacking. Unassociated VPCs cannot query the corresponding servers, defining the access boundary for your internal systems and limiting core data access to a minimum scope.

For ECSs that store core data, not binding elastic IPs and using Intranet DNS to provide domain resolution services ensures the security of core data and enables access to it.

Flexible Control

Not limited by public domain resolution. You can add any domain name within the VPC, such as baidu.com, and this domain can overwrite the results of public DNS resolution.

You can define domain names with formats different from public domain names. For example, domain names that do not end with .com, such as test.test, are possible.

Different Region VPCs can define the same domain name, allowing different Region VPCs to access different cloud resources using the same domain name for nearby access. For example, when querying test.example.com in the VPCs of Xiong'an and Xiong'an2, DNS will return the cloud resource addresses of Xiong'an and Xiong'an2 respectively.