sing-box/docs/configuration/inbound/tun.md

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---
icon: material/new-box
---
!!! 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
```json
{
"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 connections are forwarded. To share your VPN connection over hotspot or repeater,
use [VPNHotspot](https://github.com/Mygod/VPNHotspot).
*In Linux*:
`auto_route` with `auto_redirect` now 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](https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/dd197552%28v%3Dws.10%29)
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](#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](#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](#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](#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](https://github.com/google/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](/configuration/shared/listen/) for details.