Overview

A secure, fast, stable, and reliable authoritative Domain Name System (DNS) service. Alibaba Cloud DNS helps enterprises and developers convert human-readable domain names into machine-readable IP addresses and then routes user requests to required website or application servers.

Benefits

• Stability and Reliability Delivers SLA-guaranteed service availability of 100% to ensure that your websites or applications run stably.
• Security Processes up to hundreds of millions of DNS queries per second and protects your websites or applications against DNS attacks.
• Intelligent DNS Resolution Returns IP addresses based on your geographical locations. Resolution lines cover 6 major Internet Service Providers (ISPs) and their provincial branches in China, 6 continents and 88 countries and regions outside China.
• Global Nodes Provides 19 DNS cluster nodes worldwide and the DNS smart acceleration service to allow you to access the closest nodes with low latency.

Features

Basic Resolution

• Record Types Supports the following types of DNS records: A, AAAA, CAA, MX, CNAME, TXT, NS, and SRV.
• URL Forwarding (302 Redirect) Supports up to 10 implicit or explicit URL forwarding records.
• Subdomain Management Supports independent authorization management for second-level and third-level subdomains. The number of DNS records for subdomains is unlimited.
• Minimum TTL Allows you to set the minimum time to live (TTL) to 1 second for the changes to DNS records to take effect.
• Load Balancing Supports up to100 IP addresses that are used for load balancing in a single line of a domain name.
• Weighted Round-robin Supports A and CNAME records.
• Query Statistics Collects statistics of DNS queries for primary domain names and subdomain names.
• Batch DNS Resolution Improves DNS resolution efficiency by processing batch tasks asynchronously in the background at high speed. Up to 10,000 DNS records can be processed within 10 minutes.

Intelligent DNS Resolution

• Lines Outside China Supports Oceania, Asia, Europe, North America, South America, and Africa.
• Subdivided Lines Outside China Supports 6 continents, which cover 88 countries and regions.
• ISP Lines Supports China Unicom, China Telecom, China Mobile, CERNET, Dr. Peng Telecom & Media Group, and China Broadcasting Network.
• Subdivided ISP Lines Supports 6 major ISPs, which cover 31 provinces.
• Region Lines Supports Central China, North China, Northeast China, East China, South China, Southwest China, Northwest China.
• Subdivided Region Lines Supports 7 regions in China, which cover 31 provinces.
• Custom Lines Supports intelligent DNS resolution for lines based on custom IP address ranges.

DNS Security

• DNS Query Attacks Supports real-time attack detection and abnormal traffic handling, and processes up to hundreds of millions of DNS queries per second.

DNS Traffic Analysis

• Statistics on DNS requests
• Analysis of DNS request sources
• Analysis of matched DNS lines
• Analysis of DNS response characteristics
• Query for DNS response logs

DNS Monitoring

• Wide Coverage of Nodes Deploys more than 1,000 nodes in China. These nodes are distributed in the provinces and regions of major ISPs in China.
• Real-time Monitoring and Alerting Performs 24/7 monitoring to promptly identify exceptions and send alerts to O&M personnel.
• DNS Hijacking Mitigation Monitors the domain name hijacking status in real time to reduce the probability of DNS hijacking to a certain extent.
• Rapid DNS Resolution Reduces the recursive process of public DNS servers to accelerate DNS resolution.

Secondary DNS

• Disaster Recovery and Backup Secondary DNS provides disaster recovery and backup for your DNS. If your DNS server fails, the secondary DNS server can continue to provide DNS services to ensure that your business system is still accessible.
• Load Balancing To achieve load balancing, you can use the secondary DNS server and your DNS server to provide DNS services at the same time. To protect your DNS server, you can use only the secondary DNS server to provide DNS services.
• Secure and Effective Resolution Secondary DNS provides efficient DNS services based on the global node distribution of Alibaba Cloud DNS, and protects your websites or applications against DDoS attacks.

Public Recursive DNS

• App Hijacking Prevention HTTP-based DNS resolution bypasses local DNS servers and prevents cache pollution issues.
• Multiple Access Methods Supports access of apps and IoT devices through APIs and SDKs for Android/iOS/HarmonyOS.
• DNS Sync&Update Enables recursive DNS to work with authoritative DNS to update resolution results in seconds.

Global Traffic Manager

• Health Check Allows you to perform protocol-based health checks to retrieve the status of application services through the ICMP, TCP, HTTP, and HTTPS protocols.
• Multiple Access Policies Supports access policies based on geographical locations and access latency to implement nearby access.
• Automatic Failover Supports load balancing between multiple IP addresses. This ensures that fault detection and failover can be completed within 1 minute at the earliest and guarantees the security and stability of application services.

Global Nodes

• Distribution of Nodes in China China (Beijing), China (Shanghai), China (Shenzhen), China (Hangzhou), China (Heyuan), China (Zhangjiakou), China (Chengdu)
• Distribution of International Nodes China (Hong Kong), Japan (Tokyo), Singapore, Malaysia (Kuala Lumpur), Indonesia (Jakarta), Australia (Sydney), US (Virginia), US (Silicon Valley), Germany (Frankfurt), UK (London), UAE (Dubai)