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70 lines
1.5 KiB
Markdown
70 lines
1.5 KiB
Markdown
---
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icon: material/new-box
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---
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!!! question "Since sing-box 1.14.0"
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# Bridge
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!!! quote ""
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Requires privileges. Supported on Linux, macOS, rooted Android, and jailbroken iOS.
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For graphical clients: on macOS, only available in the standalone version and requires the
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Root Helper; on Android, requires root permission; on iOS, requires jailbreak.
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`bridge` is the L3 counterpart of the `direct` outbound: it forwards L3 connections
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(TCP, UDP and ICMP) directly out of a network interface. Route L3 traffic to it from a TUN
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or other L3 endpoints via the `route` action in
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[Pre-match](/configuration/shared/pre-match/); L4 connections will be rejected.
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### Structure
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```json
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{
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"type": "bridge",
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"tag": "bridge-out",
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"interface": "",
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"bridge_name": "",
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"iproute2_table_index": 0,
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"iproute2_rule_index": 0
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}
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```
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### Fields
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#### interface
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Interface name for forwarded traffic to egress.
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The default interface will be used by default.
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Forwarded traffic will be dropped while the interface is unavailable.
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#### bridge_name
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Custom bridge TUN interface name prefix, `bridge` is used by default.
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Not effective on Apple platforms.
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#### iproute2_table_index
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!!! quote ""
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Only supported on Linux, and only takes effect when `interface` is set.
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Linux iproute2 table index for pinned egress routes.
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`2200` + instance index is used by default.
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#### iproute2_rule_index
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!!! quote ""
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Only supported on Linux.
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Linux iproute2 rule start index.
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`100` is used by default.
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