AWS Hong Kong instance is inaccessible in China//Global IPLC service provider of Shigeng Communicat

  AWS Hong Kong instance is inaccessible in China//Global IPLC service provider of Shigeng Communication

一、In recent years, with the popularity of cloud computing services, more and more enterprises have chosen to use international cloud service platforms such as AWS to deploy their applications and services. However, for users located in Chinese Mainland, when accessing the instances of data centers deployed in AWS Asia Pacific region (Hong Kong) (i.e., the ap-east-1 region), they may encounter unstable connections or completely inaccessible problems. This article will explore the reasons behind this phenomenon and provide a series of possible solutions.

1. Root cause analysis of the problem

1. Network latency and bandwidth limitations

The network connection between mainland China and Hong Kong is usually affected by the quality of the operator's lines, especially during peak hours when network congestion can lead to higher latency and packet loss rates. In addition, cross-border data transmission is often accompanied by stricter traffic control measures, which further limit available bandwidth.

2. DNS resolution issues

In some cases, domestic DNS servers may fail to correctly resolve domain name records pointing to AWS Hong Kong regional resources, resulting in request timeouts or failures. In addition, due to policy reasons, some domain name resolutions may be blocked or redirected.

3. Network censorship mechanism

Chinese Mainland implements a relatively strict Internet content regulation policy, namely the so-called "firewall". Some specific IP address segments or URLs may be subject to varying degrees of filtering, affecting direct access to overseas servers.

4. Improper configuration of security group

If the security group rules of AWS instances are set too strictly and necessary ports are not opened to IP addresses from China, even if physical network conditions permit, effective connections may not be established due to insufficient permissions.

2. Solution suggestions

1. Use CDN acceleration service

By setting up CDN service providers with edge nodes in Chinese Mainland, the speed of accessing AWS instances in Hong Kong from local can be significantly improved. For example, CDN services provided by Alibaba Cloud and Tencent Cloud can cache static content near the user's geographic location, reducing the number of cross domain requests.

2. Replace the DNS server

It is recommended to use public DNS services such as Google Public DNS, which have a wide distribution point worldwide and can provide faster and more accurate domain name resolution results.

3. Optimize routing selection

Shigeng Communication has optimized international export routes for specific destinations (such as Hong Kong) to choose from. In addition, consider using MPLS dedicated lines or SD-WAN technology to build more stable cross-border connections.

4. Adjust the security group rules

Ensure that the security group of the AWS instance is correctly configured to allow inbound connections within the common IP range from the Chinese Mainland. Meanwhile, following the principle of minimum privilege, only the service ports that are actually needed are opened.

epilogue

Although there are certain challenges, by adopting appropriate technological measures and strategic adjustments, it is possible to effectively alleviate or even solve the problem of AWS Hong Kong instances being inaccessible in China. I hope the information provided in this article can inspire and assist relevant practitioners.

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