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    Alibaba Cloud DNS:Custom lines

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    Alibaba Cloud DNS:Custom lines

    Last Updated:Jan 20, 2026

    Custom ACLs allow you to configure Alibaba Cloud DNS to return specific IP addresses for DNS queries from a specified IP address range.

    Prerequisites

    • The public authoritative zone service must be upgraded to the Ultimate Edition or later.

    Step 1: Create a custom line

    1. Go to the Alibaba Cloud DNS - Public Authoritative Zone page and click Settings for the target domain name.

    2. Switch to the Custom ACLs tab.

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    3. Click Add Custom ACLs, and enter a ACL Name and an IP Address Range.

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      Note

      Custom lines support only IPv4 addresses and do not support IPv6 addresses.

      Important

      • By default, the Public Zone service performs intelligent DNS scheduling based on the egress IP address of the client's local DNS server.

      • If the client's local DNS server supports EDNS-Client-Subnet (ECS), the Public Zone service can perform intelligent DNS scheduling based on the client's CIDR block.

    Step 2: Configure DNS records for the custom line

    1. Go to the Alibaba Cloud DNS - Public Authoritative Zone page and click Settings for the target domain name.

    2. When adding a DNS record, set Query Source to Custom Line. Then, select the custom line that you created.

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