Alibaba Free Public DNS Resolution Service Alibaba Cloud DNS Server Address Recommendation

As the leading domain name resolution service in China, Alibaba Public DNS's technical architecture and service quality are worth in-depth discussion. This article will comprehensively analyze the various features of Alibaba Public DNS, including its technical principles, performance advantages, security mechanisms, and actual application scenarios.

1. Technical Architecture of Alibaba Public DNS

Alibaba Public DNS adopts a distributed architecture design and deploys multiple resolution nodes around the world. These nodes implement intelligent routing through BGP Anycast technology, and user requests are automatically routed to the nearest resolution node. In terms of DNS cache strategy, Alibaba Public DNS adopts a multi-level cache mechanism, including memory cache, SSD cache, etc., to ensure the resolution response speed.

1.1 Global Node Distribution

Alibaba Public DNS has deployed resolution nodes in 31 provincial administrative regions in China, covering major operator networks such as China Telecom, China Unicom, and China Mobile. Overseas nodes are distributed in major regions such as Asia, Europe, and North America, ensuring that global users can obtain high-quality resolution services.

1.2 Parsing protocol support

In addition to the traditional UDP protocol, Alibaba Public DNS fully supports the following modern DNS protocols:

• DNS over HTTPS (DoH)
• DNS over TLS (DoT)
• DNSSEC Validation
• EDNS Client Subnet

2. Performance Advantage Analysis

Actual test data shows that the average resolution delay of Alibaba Public DNS is less than 10ms, which is much lower than the industry average. This is mainly due to:

2.1 Intelligent dispatching system

Alibaba's self-developed intelligent scheduling algorithm can monitor the load of each node in real time and dynamically adjust traffic distribution. When a node fails, the system can complete the failover in seconds.

2.2 Cache Hit Optimization

Predict hot domain names through machine learning algorithms and preheat the cache in advance. According to statistics, the cache hit rate of Alibaba Public DNS is as high as 98%, which greatly reduces the number of recursive queries.

3. Security protection mechanism

Alibaba Public DNS has built a complete security protection system:

3.1 Anti-hijacking technology

A multi-factor verification mechanism is used to ensure that the returned resolution results have not been tampered with. At the same time, abnormal resolution requests are identified through big data analysis to effectively defend against DNS poisoning attacks.

3.2 Privacy Protection

Strictly comply with privacy protection regulations such as GDPR, all log data will be anonymized and retained for no more than 30 days.

4. Enterprise-level solutions

For enterprise users, Alibaba Public DNS provides a professional version service with the following main features:

• Dedicated parsing node
• Customized caching strategy
• API Management Interface
• Detailed data analysis reports

5. Usage suggestions

For ordinary users, it is recommended to configure both IPv4 and IPv6 addresses to obtain the best network experience. Enterprise users can choose the standard or professional edition service according to business needs.

In general, Alibaba Public DNS has become a benchmark product for domestic DNS services with its excellent performance, reliable security and complete functions. Both individual users and corporate customers can obtain a significant improvement in network experience from it.