sing-box/tun.md at dev

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!!! quote "Changes in sing-box 1.10.0"

:material-plus: [address](#address)  
:material-delete-clock: [inet4_address](#inet4_address)  
:material-delete-clock: [inet6_address](#inet6_address)  
:material-plus: [route_address](#route_address)  
:material-delete-clock: [inet4_route_address](#inet4_route_address)  
:material-delete-clock: [inet6_route_address](#inet6_route_address)  
:material-plus: [route_exclude_address](#route_address)  
:material-delete-clock: [inet4_route_exclude_address](#inet4_route_exclude_address)  
:material-delete-clock: [inet6_route_exclude_address](#inet6_route_exclude_address)  
:material-plus: [iproute2_table_index](#iproute2_table_index)  
:material-plus: [iproute2_rule_index](#iproute2_table_index)  
:material-plus: [auto_redirect](#auto_redirect)  
:material-plus: [auto_redirect_input_mark](#auto_redirect_input_mark)  
:material-plus: [auto_redirect_output_mark](#auto_redirect_output_mark)  
:material-plus: [route_address_set](#route_address_set)  
:material-plus: [route_exclude_address_set](#route_address_set)

!!! quote "Changes in sing-box 1.9.0"

:material-plus: [platform.http_proxy.bypass_domain](#platformhttp_proxybypass_domain)  
:material-plus: [platform.http_proxy.match_domain](#platformhttp_proxymatch_domain)

!!! quote "Changes in sing-box 1.8.0"

:material-plus: [gso](#gso)  
:material-alert-decagram: [stack](#stack)

!!! quote ""

Only supported on Linux, Windows and macOS.

Structure

{
  "type": "tun",
  "tag": "tun-in",
  "interface_name": "tun0",
  "address": [
    "172.18.0.1/30",
    "fdfe:dcba:9876::1/126"
  ],
  // deprecated
  "inet4_address": [
    "172.19.0.1/30"
  ],
  // deprecated
  "inet6_address": [
    "fdfe:dcba:9876::1/126"
  ],
  "mtu": 9000,
  "gso": false,
  "auto_route": true,
  "iproute2_table_index": 2022,
  "iproute2_rule_index": 9000,
  "auto_redirect": false,
  "auto_redirect_input_mark": "0x2023",
  "auto_redirect_output_mark": "0x2024",
  "strict_route": true,
  "route_address": [
    "0.0.0.0/1",
    "128.0.0.0/1",
    "::/1",
    "8000::/1"
  ],
  // deprecated
  "inet4_route_address": [
    "0.0.0.0/1",
    "128.0.0.0/1"
  ],
  // deprecated
  "inet6_route_address": [
    "::/1",
    "8000::/1"
  ],
  "route_exclude_address": [
    "192.168.0.0/16",
    "fc00::/7"
  ],
  // deprecated
  "inet4_route_exclude_address": [
    "192.168.0.0/16"
  ],
  // deprecated
  "inet6_route_exclude_address": [
    "fc00::/7"
  ],
  "route_address_set": [
    "geoip-cloudflare"
  ],
  "route_exclude_address_set": [
    "geoip-cn"
  ],
  "endpoint_independent_nat": false,
  "udp_timeout": "5m",
  "stack": "system",
  "include_interface": [
    "lan0"
  ],
  "exclude_interface": [
    "lan1"
  ],
  "include_uid": [
    0
  ],
  "include_uid_range": [
    "1000-99999"
  ],
  "exclude_uid": [
    1000
  ],
  "exclude_uid_range": [
    "1000-99999"
  ],
  "include_android_user": [
    0,
    10
  ],
  "include_package": [
    "com.android.chrome"
  ],
  "exclude_package": [
    "com.android.captiveportallogin"
  ],
  "platform": {
    "http_proxy": {
      "enabled": false,
      "server": "127.0.0.1",
      "server_port": 8080,
      "bypass_domain": [],
      "match_domain": []
    }
  },
  ...
  // Listen Fields
}

!!! note ""

You can ignore the JSON Array [] tag when the content is only one item

!!! warning ""

If tun is running in non-privileged mode, addresses and MTU will not be configured automatically, please make sure the settings are accurate.

Fields

interface_name

Virtual device name, automatically selected if empty.

address

!!! question "Since sing-box 1.10.0"

IPv4 and IPv6 prefix for the tun interface.

inet4_address

!!! failure "Deprecated in sing-box 1.10.0"

`inet4_address` is merged to `address` and will be removed in sing-box 1.11.0.

IPv4 prefix for the tun interface.

inet6_address

!!! failure "Deprecated in sing-box 1.10.0"

`inet6_address` is merged to `address` and will be removed in sing-box 1.11.0.

IPv6 prefix for the tun interface.

mtu

The maximum transmission unit.

gso

!!! question "Since sing-box 1.8.0"

!!! quote ""

Only supported on Linux with `auto_route` enabled.

Enable generic segmentation offload.

auto_route

Set the default route to the Tun.

!!! quote ""

To avoid traffic loopback, set `route.auto_detect_interface` or `route.default_interface` or `outbound.bind_interface`

!!! note "Use with Android VPN"

By default, VPN takes precedence over tun. To make tun go through VPN, enable `route.override_android_vpn`.

iproute2_table_index

!!! question "Since sing-box 1.10.0"

Linux iproute2 table index generated by auto_route.

2022 is used by default.

iproute2_rule_index

!!! question "Since sing-box 1.10.0"

Linux iproute2 rule start index generated by auto_route.

9000 is used by default.

auto_redirect

!!! question "Since sing-box 1.10.0"

!!! quote ""

Only supported on Linux with `auto_route` enabled.

Automatically configure iptables/nftables to redirect connections.

In Android：

Only local IPv4 connections are forwarded. To share your VPN connection over hotspot or repeater, use VPNHotspot.

In Linux:

auto_route with auto_redirect works as expected on routers without intervention.

auto_redirect_input_mark

!!! question "Since sing-box 1.10.0"

Connection input mark used by route_address_set and route_exclude_address_set.

0x2023 is used by default.

auto_redirect_output_mark

!!! question "Since sing-box 1.10.0"

Connection output mark used by route_address_set and route_exclude_address_set.

0x2024 is used by default.

strict_route

Enforce strict routing rules when auto_route is enabled:

In Linux:

Let unsupported network unreachable
Make ICMP traffic route to tun instead of upstream interfaces
Route all connections to tun

It prevents IP address leaks and makes DNS hijacking work on Android.

In Windows:

Add firewall rules to prevent DNS leak caused by Windows' ordinary multihomed DNS resolution behavior

It may prevent some applications (such as VirtualBox) from working properly in certain situations.

route_address

!!! question "Since sing-box 1.10.0"

Use custom routes instead of default when auto_route is enabled.

inet4_route_address

!!! failure "Deprecated in sing-box 1.10.0"

inet4_route_address is deprecated and will be removed in sing-box 1.11.0, please use route_address instead.

Use custom routes instead of default when auto_route is enabled.

inet6_route_address

!!! failure "Deprecated in sing-box 1.10.0"

inet6_route_address is deprecated and will be removed in sing-box 1.11.0, please use route_address instead.

Use custom routes instead of default when auto_route is enabled.

route_exclude_address

!!! question "Since sing-box 1.10.0"

Exclude custom routes when auto_route is enabled.

inet4_route_exclude_address

!!! failure "Deprecated in sing-box 1.10.0"

inet4_route_exclude_address is deprecated and will be removed in sing-box 1.11.0, please use route_exclude_address instead.

Exclude custom routes when auto_route is enabled.

inet6_route_exclude_address

!!! failure "Deprecated in sing-box 1.10.0"

inet6_route_exclude_address is deprecated and will be removed in sing-box 1.11.0, please use route_exclude_address instead.

Exclude custom routes when auto_route is enabled.

route_address_set

!!! question "Since sing-box 1.10.0"

!!! quote ""

Only supported on Linux with nftables and requires `auto_route` and `auto_redirect` enabled.

Add the destination IP CIDR rules in the specified rule-sets to the firewall. Unmatched traffic will bypass the sing-box routes.

Conflict with route.default_mark and [dialOptions].routing_mark.

route_exclude_address_set

!!! question "Since sing-box 1.10.0"

!!! quote ""

Only supported on Linux with nftables and requires `auto_route` and `auto_redirect` enabled.

Add the destination IP CIDR rules in the specified rule-sets to the firewall. Matched traffic will bypass the sing-box routes.

Conflict with route.default_mark and [dialOptions].routing_mark.

endpoint_independent_nat

!!! info ""

This item is only available on the gvisor stack, other stacks are endpoint-independent NAT by default.

Enable endpoint-independent NAT.

Performance may degrade slightly, so it is not recommended to enable on when it is not needed.

udp_timeout

UDP NAT expiration time in seconds, default is 300 (5 minutes).

stack

!!! quote "Changes in sing-box 1.8.0"

:material-delete-alert: The legacy LWIP stack has been deprecated and removed.

TCP/IP stack.

Stack	Description
`system`	Perform L3 to L4 translation using the system network stack
`gvisor`	Perform L3 to L4 translation using gVisor's virtual network stack
`mixed`	Mixed `system` TCP stack and `gvisor` UDP stack

Defaults to the mixed stack if the gVisor build tag is enabled, otherwise defaults to the system stack.

include_interface

!!! quote ""

Interface rules are only supported on Linux and require auto_route.

Limit interfaces in route. Not limited by default.

Conflict with exclude_interface.

exclude_interface

!!! warning ""

When `strict_route` enabled, return traffic to excluded interfaces will not be automatically excluded, so add them as well (example: `br-lan` and `pppoe-wan`).

Exclude interfaces in route.

Conflict with include_interface.

include_uid

!!! quote ""

UID rules are only supported on Linux and require auto_route.

Limit users in route. Not limited by default.

include_uid_range

Limit users in route, but in range.

exclude_uid

Exclude users in route.

exclude_uid_range

Exclude users in route, but in range.

include_android_user

!!! quote ""

Android user and package rules are only supported on Android and require auto_route.

Limit android users in route.

Common user	ID
Main	0
Work Profile	10

include_package

Limit android packages in route.

exclude_package

Exclude android packages in route.

platform

Platform-specific settings, provided by client applications.

platform.http_proxy

System HTTP proxy settings.

platform.http_proxy.enabled

Enable system HTTP proxy.

platform.http_proxy.server

==Required==

HTTP proxy server address.

platform.http_proxy.server_port

==Required==

HTTP proxy server port.

platform.http_proxy.bypass_domain

!!! note ""

On Apple platforms, `bypass_domain` items matches hostname **suffixes**.

Hostnames that bypass the HTTP proxy.

platform.http_proxy.match_domain

!!! quote ""

Only supported in graphical clients on Apple platforms.

Hostnames that use the HTTP proxy.

Listen Fields

See Listen Fields for details.

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Structure

Fields

interface_name

address

inet4_address

inet6_address

mtu

gso

auto_route

iproute2_table_index

iproute2_rule_index

auto_redirect

auto_redirect_input_mark

auto_redirect_output_mark

strict_route

route_address

inet4_route_address

inet6_route_address

route_exclude_address

inet4_route_exclude_address

inet6_route_exclude_address

route_address_set

route_exclude_address_set

endpoint_independent_nat

udp_timeout

stack

include_interface

exclude_interface

include_uid

include_uid_range

exclude_uid

exclude_uid_range

include_android_user

include_package

exclude_package

platform

platform.http_proxy

platform.http_proxy.enabled

platform.http_proxy.server

platform.http_proxy.server_port

platform.http_proxy.bypass_domain

platform.http_proxy.match_domain

Listen Fields

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