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DNS Split-Horizon Configuration Guide

A detailed walkthrough on optimizing network access via DNS split-horizon, including domestic and overseas DNS server setup and rule configuration.

    DNS Split-Horizon Overview

    DNS split-horizon routes resolution requests for different domains to distinct DNS servers, greatly improving network access. A well-designed setup can:

    • Accelerate domain resolution
    • Increase website stability
    • Optimize cross-border access
    • Avoid DNS pollution

    NullPrivate Split-Horizon Configuration

    Basic Example

    # Domestic DNS servers
223.5.5.5                                    # Alibaba DNS
2400:3200::1                                 # Alibaba DNS IPv6
public0.adguardprivate.svc.cluster.local    # Private DNS, mainland upstream

# Overseas DNS servers
tls://1.0.0.1                               # Cloudflare DNS
tls://[2606:4700:4700::1001]               # Cloudflare DNS IPv6
public2.adguardprivate.svc.cluster.local    # Private DNS, other upstream

# Split-horizon rules
[/google.com/bing.com/github.com/stackoverflow.com/]tls://1.0.0.1 public2.adguardprivate.svc.cluster.local
[/cn/xhscdn.com/tencentclb.com/tencent-cloud.net/aliyun.com/alicdn.com/]223.5.5.5 2400:3200::1 public0.adguardprivate.svc.cluster.local

    Domestic Carrier DNS Servers

    China Telecom DNS Servers

    NamePrimary DNS ServerSecondary DNS Server
    Anhui CT61.132.163.68202.102.213.68
    Beijing CT219.142.76.3219.141.140.10
    Chongqing CT61.128.192.6861.128.128.68
    Fujian CT218.85.152.99218.85.157.99
    Gansu CT202.100.64.6861.178.0.93
    Guangdong CT202.96.128.86202.96.128.166
    Guangxi CT202.103.225.68202.103.224.68
    Guizhou CT202.98.192.67202.98.198.167
    Henan CT222.88.88.88222.85.85.85
    Heilongjiang CT219.147.198.230219.147.198.242
    Hubei CT202.103.24.68202.103.0.68
    Hunan CT222.246.129.8059.51.78.211
    Jiangsu CT218.2.2.2218.4.4.4
    Jiangxi CT202.101.224.69202.101.226.68
    Inner Mongolia CT219.148.162.31222.74.39.50
    Shandong CT219.146.1.66219.147.1.66
    Shaanxi CT218.30.19.4061.134.1.4
    Shanghai CT202.96.209.133116.228.111.118
    Sichuan CT61.139.2.69218.6.200.139
    Tianjin CT219.150.32.132219.146.0.132
    Yunnan CT222.172.200.6861.166.150.123
    Zhejiang CT202.101.172.3561.153.177.196
    Tibet CT202.98.224.68202.98.224.69

    China Unicom DNS Servers

    NamePrimary DNS ServerSecondary DNS Server
    Beijing CU123.123.123.123123.123.123.124
    Chongqing CU221.5.203.98221.7.92.98
    Guangdong CU210.21.196.6221.5.88.88
    Hebei CU202.99.160.68202.99.166.4
    Henan CU202.102.224.68202.102.227.68
    Heilongjiang CU202.97.224.69202.97.224.68
    Jilin CU202.98.0.68202.98.5.68
    Jiangsu CU221.6.4.66221.6.4.67
    Inner Mongolia CU202.99.224.68202.99.224.8
    Shandong CU202.102.128.68202.102.152.3
    Shanxi CU202.99.192.66202.99.192.68
    Shaanxi CU221.11.1.67221.11.1.68
    Shanghai CU210.22.70.3210.22.84.3
    Sichuan CU119.6.6.6124.161.87.155
    Tianjin CU202.99.104.68202.99.96.68
    Zhejiang CU221.12.1.227221.12.33.227
    Liaoning CU202.96.69.38202.96.64.68

    China Mobile DNS IPs

    NamePrimary DNS ServerSecondary DNS Server
    Beijing CM221.130.33.60221.130.33.52
    Guangdong CM211.136.192.6211.139.136.68
    Jiangsu CM221.131.143.69112.4.0.55
    Anhui CM211.138.180.2211.138.180.3
    Shandong CM218.201.96.130211.137.191.26

    Public DNS IPs

    NamePrimary DNS ServerSecondary DNS Server
    114 DNS114.114.114.114114.114.115.115
    CNNIC SDNS1.2.4.8210.2.4.8
    Alibaba Public223.5.5.5223.6.6.6
    DNSPod DNS+119.29.29.29119.29.29.29
    Google DNS8.8.8.88.8.4.4

    Configuration Tips

    1. Prefer geographically close DNS servers
    2. Configure both IPv4 and IPv6 DNS
    3. Set up backup DNS for critical domains
    4. Update split-horizon rules regularly
    5. Monitor DNS response times

    Precautions

    • Record original DNS settings before changes
    • Avoid untrusted DNS servers
    • Periodically verify DNS resolution
    • Keep rule lists concise and effective

    Proper DNS split-horizon configuration can significantly improve network access. Choose DNS servers and rules according to your actual needs.

    References