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2026-07-16 21:35:01 +08:00

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!!! quote "Changes in sing-box 1.14.0"
:material-plus: [udp_mapping](/configuration/shared/udp-nat/#udp_mapping)
:material-plus: [udp_filtering](/configuration/shared/udp-nat/#udp_filtering)
:material-plus: [udp_nat_max](/configuration/shared/udp-nat/#udp_nat_max)
!!! quote ""
Only supported on Linux.
### Structure
```json
{
"type": "tproxy",
"tag": "tproxy-in",
... // Listen Fields
"network": "udp",
... // UDP NAT Fields
}
```
### Listen Fields
See [Listen Fields](/configuration/shared/listen/) for details.
### Fields
#### network
Listen network, one of `tcp` `udp`.
Both if empty.
### UDP NAT Fields
See [UDP NAT Fields](/configuration/shared/udp-nat/) for details.