sing-box/docs/configuration/outbound/tuic.md

Structure

{
  "type": "tuic",
  "tag": "tuic-out",
  
  "server": "127.0.0.1",
  "server_port": 1080,
  "uuid": "2DD61D93-75D8-4DA4-AC0E-6AECE7EAC365",
  "password": "hello",
  "congestion_control": "cubic",
  "udp_relay_mode": "native",
  "udp_over_stream": false,
  "zero_rtt_handshake": false,
  "heartbeat": "10s",
  "network": "tcp",
  "tls": {},
  
  ... // Dial Fields
}

!!! warning ""

QUIC, which is required by TUIC is not included by default, see [Installation](./#installation).

Fields

server

==Required==

The server address.

server_port

==Required==

The server port.

uuid

==Required==

TUIC user uuid

password

TUIC user password

congestion_control

QUIC congestion control algorithm

One of: cubic, new_reno, bbr

cubic is used by default.

udp_relay_mode

UDP packet relay mode

Mode	Description
native	native UDP characteristics
quic	lossless UDP relay using QUIC streams, additional overhead is introduced

native is used by default.

Conflict with udp_over_stream.

udp_over_stream

This is the TUIC port of the UDP over TCP protocol, designed to provide a QUIC stream based UDP relay mode that TUIC does not provide. Since it is an add-on protocol, you will need to use sing-box or another program compatible with the protocol as a server.

This mode has no positive effect in a proper UDP proxy scenario and should only be applied to relay streaming UDP traffic (basically QUIC streams).

Conflict with udp_relay_mode.

network

Enabled network

One of tcp udp.

Both is enabled by default.

tls

==Required==

TLS configuration, see TLS.

Dial Fields

See Dial Fields for details.