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108 lines
2.8 KiB
Markdown
108 lines
2.8 KiB
Markdown
---
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icon: material/new-box
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---
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!!! quote "Changes in sing-box 1.9.0"
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:material-plus: [client_subnet](#client_subnet)
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### Structure
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```json
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{
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"dns": {
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"servers": [
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{
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"tag": "",
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"address": "",
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"address_resolver": "",
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"address_strategy": "",
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"strategy": "",
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"detour": "",
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"client_subnet": ""
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}
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]
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}
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}
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```
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### Fields
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#### tag
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The tag of the dns server.
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#### address
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==Required==
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The address of the dns server.
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| Protocol | Format |
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|--------------------------------------|-------------------------------|
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| `System` | `local` |
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| `TCP` | `tcp://1.0.0.1` |
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| `UDP` | `8.8.8.8` `udp://8.8.4.4` |
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| `TLS` | `tls://dns.google` |
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| `HTTPS` | `https://1.1.1.1/dns-query` |
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| `QUIC` | `quic://dns.adguard.com` |
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| `HTTP3` | `h3://8.8.8.8/dns-query` |
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| `RCode` | `rcode://refused` |
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| `DHCP` | `dhcp://auto` or `dhcp://en0` |
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| [FakeIP](/configuration/dns/fakeip/) | `fakeip` |
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!!! warning ""
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To ensure that Android system DNS is in effect, rather than Go's built-in default resolver, enable CGO at compile time.
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!!! info ""
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the RCode transport is often used to block queries. Use with rules and the `disable_cache` rule option.
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| RCode | Description |
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|-------------------|-----------------------|
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| `success` | `No error` |
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| `format_error` | `Format error` |
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| `server_failure` | `Server failure` |
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| `name_error` | `Non-existent domain` |
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| `not_implemented` | `Not implemented` |
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| `refused` | `Query refused` |
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#### address_resolver
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==Required if address contains domain==
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Tag of a another server to resolve the domain name in the address.
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#### address_strategy
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The domain strategy for resolving the domain name in the address.
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One of `prefer_ipv4` `prefer_ipv6` `ipv4_only` `ipv6_only`.
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`dns.strategy` will be used if empty.
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#### strategy
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Default domain strategy for resolving the domain names.
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One of `prefer_ipv4` `prefer_ipv6` `ipv4_only` `ipv6_only`.
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Take no effect if overridden by other settings.
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#### detour
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Tag of an outbound for connecting to the dns server.
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Default outbound will be used if empty.
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#### client_subnet
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!!! question "Since sing-box 1.9.0"
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Append a `edns0-subnet` OPT extra record with the specified IP address to every query by default.
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Can be overrides by `rules.[].client_subnet`.
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Will overrides `dns.client_subnet`.
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