sing-box/docs/configuration/dns/index.md

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### Structure
```json
{
"dns": {
"servers": [],
"rules": [],
"final": "",
"strategy": "",
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"disable_cache": false,
"disable_expire": false
}
}
```
### Fields
| Key | Format |
|----------|--------------------------------|
| `server` | List of [DNS Server](./server) |
| `rules` | List of [DNS Rule](./rule) |
#### final
Default dns server tag.
The first server will be used if empty.
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#### strategy
Default domain strategy for resolving the domain names.
One of `prefer_ipv4` `prefer_ipv6` `ipv4_only` `ipv6_only`.
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Take no effect if `server.strategy` is set.
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#### disable_cache
Disable dns cache.
#### disable_expire
Disable dns cache expire.