Operating system

Linux

System version

Debian 13

Installation type

Original sing-box Command Line

If you are using a graphical client, please provide the version of the client.

No response

Version

main branch

Description

We use MPTCP to proxy client's TCP and UDP traffic. So we need to be able to send UDP traffic in TCP. With the current configuration I have, UoT is rejected on the server host with a "global UoT not supported since sing-box v1.7.0" error.

Reproduction

Client:

{
  "inbounds": [
    {
      "type": "tproxy",
      "listen": "127.0.0.1",
      "listen_port": 12345
    }
  ],
  "outbounds": [
    {
      "type": "shadowsocks",
      "server": "server",
      "server_port": 12343,
      "method": "none",
      "password": "",
      "udp_over_tcp": {
        "enabled": true
      },
      "tcp_multi_path": true
    }
  ]
}

Server:

{
  "inbounds": [
    {
      "type": "shadowsocks",
      "listen": "::",
      "listen_port": 12343,
      "network": "tcp",
      "tcp_multi_path": true,
      "method": "none",
      "password": ""
    }
  ],
  "outbounds": [
    {
      "type": "direct"
    }
  ]
}

Logs

Client

INFO[2330] [3035214919 0ms] inbound/tproxy[0]: inbound packet connection from 192.168.1.183:41953
INFO[2330] [3035214919 0ms] inbound/tproxy[0]: inbound packet connection to host:1234
INFO[2330] [3035214919 1ms] outbound/shadowsocks[0]: outbound UoT packet connection to host:1234
TRACE[2330] [3035214919 8ms] connection: packet download closed
TRACE[2330] [3035214919 8ms] connection: packet upload closed


Server

INFO[0494] [1900851697 0ms] inbound/shadowsocks[0]: inbound connection from client:34438
INFO[0494] [1900851697 0ms] inbound/shadowsocks[0]: inbound connection to sp.v2.udp-over-tcp.arpa:0
ERROR[0494] [1900851697 0ms] inbound/shadowsocks[0]: process connection from client:34438: global UoT not supported since sing-box v1.7.0.

Supporter

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Integrity requirements

• I confirm that I have read the documentation, understand the meaning of all the configuration items I wrote, and did not pile up seemingly useful options or default values.
• I confirm that I have provided the server and client configuration files and process that can be reproduced locally, instead of a complicated client configuration file that has been stripped of sensitive data.
• I confirm that I have provided the simplest configuration that can be used to reproduce the error I reported, instead of depending on remote servers, TUN, graphical interface clients, or other closed-source software.
• I confirm that I have provided the complete configuration files and logs, rather than just providing parts I think are useful out of confidence in my own intelligence.