Domain detection

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domain detection

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1. The premise of domain detection is that the domain's nameservers must point to i3.zenecn.net and i4.zenecn.net.

2. Domain detection will simultaneously query authoritative nameservers and public recursive DNS servers, carrying ECS (EDNS Client Subnet) information.

3. When the returned results match the configured records, we consider the resolution to be effective; otherwise, it is deemed ineffective.