Alibaba Cloud DNS is a secure, fast, stable, and reliable authoritative DNS service. It 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
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Stability and Reliability
Delivers SLA-guaranteed service availability of 100% to ensure that your websites or applications run stably.
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Security
Processes up to hundreds of millions of DNS queries per second and protects your websites or applications against DNS attacks.
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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.
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Global Nodes
Provides 20 DNS cluster nodes worldwide and the DNS smart acceleration service to allow you to access the closest nodes with low latency.
Features
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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.
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Intelligent DNS Resolution
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.
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.
Custom Lines
Supports intelligent DNS resolution for lines based on custom IP address ranges.
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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.
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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.
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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.
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DNS over IPv6
IPv6 Support
Supports IPv6-based AAAA records and provides DNS servers that support access from IPv6 addresses.
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Batch DNS Resolution
Fast and Efficient Processing
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.
Comprehensive Features
Provides flexible batch DNS resolution. You can add, modify, and delete multiple DNS records at a time. It also allows you to manage domain names in groups, host domain names that are not registered at Alibaba Cloud, and delete multiple domain names at a time.
Capability Opening
Uses APIs that are dedicated for batch DNS resolution. These APIs are used for custom DNS resolution and provide you with reliable domain name resolution capabilities. For more information, see API Reference in Document Center.
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Global Nodes
Nodes in China
China (Zhangjiakou-Beijing Winter Olympics), China (Beijing), China (Shijiazhuang), China (Chengdu), China (Wuhan), China (Shanghai), China (Hangzhou), China (Shenzhen), and China (Hong Kong)
Nodes Outside China
Japan (Tokyo), Singapore, Malaysia (Kuala Lumpur), US (Virginia), US (Silicon Valley), UAE (Dubai), Australia (Sydney), India (Mumbai), Germany (Frankfurt), Indonesia (Jakarta), and UK (London)
Typical Scenarios
Multi-line Intelligent DNS Resolution
Uses health checks of applications and DNS routing technologies such as weighted round-robin and geolocation DNS (GEO DNS) to automatically block failures and implement failovers.
Benefits
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Distributed Health Check
Monitors applications in different regions in real time to detect downtime and exceptions in a timely manner.
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Multi-line Load Balancing
Uses load sharing and weighted round-robin algorithms to route access traffic to ideal service nodes based on your business requirements.
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Automatic Blocking of Failure IP Addresses
Automatically blocks the IP addresses where faults occur to reduce the downtime caused by the faults.
Defense Against DNS Query Attacks
For users of live streaming, video, games and social networking, DNS security + high anti-IP can be purchased and used together, and protection measures have been added in both the parsing request and the website site, so that the website will be more secure.
Benefits
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Anti-DDoS Protection
Prevents service interruptions caused by massive DNS resolution requests sent to victim DNS servers.
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DNS Bounce-back denial-of-service attack with Broadband Exhaustion
Solve the problem that a large number of hosts forge the victim IP to send query request packets to a large number of open recursive DNS servers on the Internet, block the network of the victim DNS servers, and cause business interruption.
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Hundreds of Millions of DNS Queries per Second
Resolves the issues of high business traffic and high QPS resolution requests in large-sized enterprises.
Fast, Stable, and Secure Terminal Access
Provides a fast, stable, and secure DNS resolution service for various terminals, such as mobile terminals, apps, and IoT devices in DNS over HTTPS (DoH) or DNS over TLS (DoT) mode.
Benefits
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Accelerated Terminal Access
Allows terminals to access the nearest nodes. Recursive DNS resolution is not required for access to about 50% of the domain names in China. Access to these domain names can be directly routed to the requested nodes.
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Stable DNS Resolution for Terminals
Deploys hundreds of servers worldwide to provide sufficient bandwidths. This achieves stable access to nodes.
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Efficient Anti-hijacking for Secure Access
Bypasses local DNS servers of Internet service providers (ISPs) to prevent domain hijacking and protect user privacy.
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