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China Authoritative DNS

Cloudflare China Network provides a nearest-to-client nameservice by default. The DNS request is resolved on the data center nearest to the client out of China, and the HTTP request is served on the data center nearest to the client. The closest Cloudflare data center outside of China is adopted for clients outside of China, and the JD Cloud data center in China is adopted for clients in China.

In-China Nameserver

Cloudflare is able to deploy DNS service in Mainland China to improve the Time to First Byte (TTFB) performance. With this deployment, the DNS query will be resolved in Mainland China instead of global DNS servers.

When to use

Before you enable China Authoritative DNS, you should confirm that majority (over 90%) of the traffic is coming from Mainland China. After you enable China Authoritative DNS, all the global DNS requests will be routed to JD Cloud data centers in Mainland China instead of the nearest data centers.

Comparison

The following table compares the default DNS offering with the In-China Nameserver option.

DNS optionBehavior
DefaultUses the DNS server closest to the end user.
In-China DNSUses only DNS in China, operated by JD Cloud.

General setup

After you enable the Cloudflare China Network service, do the following:

  1. Contact your Cloudflare sales team to enable the feature. Currently you cannot enable it in the Cloudflare dashboard.

    The current China Network supports both a full setup and a partial setup.

  2. Update your domain registrar with the assigned in-China nameservers.

    • For a full setup: These nameservers are displayed in the Cloudflare dashboard.
    • For a partial setup: Create a CNAME record pointing to <hostname>.cdn.cloudflareanycast.net for global default DNS setting and <hostname>.cdn.cloudflarecn.net for In-China DNS.

    Example 1: China Network zone named example.cn that requires In-China DNS

    If you have two DNS records, www and media, pointing to two different origin servers. Your Authoritative DNS server will have the following DNS records:

    • CNAME www.example.cn to www.example.cn.cdn.cloudflarecn.net
    • CNAME media.example.cn to media.example.cn.cdn.cloudflarecn.net

    Example 2: China Network zone named example.com that requires global default DNS setting

    If you have two DNS records, www and media, pointing to two different origin servers. Your Authoritative DNS server will have the following DNS records:

    • CNAME www.example.com to www.example.com.cdn.cloudflareanycast.net
    • CNAME media.example.com to media.example.com.cdn.cloudflareanycast.net

  3. Test your configuration by checking if the domain resolves correctly.

For further assistance, contact your account team.