Bind: can't assign requested address

Operating system

macOS

System version

macOS 15.2(24C101)

Installation type

sing-box for macOS Graphical Client

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

1.12.0(431)

Version

Description

Reproduction

Import follow config and run, then there will be a popup like the one above:

{
  "inbounds": [
    {
      "type": "tun",
      "address": "172.19.0.1/30",
      "stack": "system"
    }
  ]
}

Logs

(packet-tunnel): Here I stand
INFO[0000] network: updated available networks: en0 (wifi), utun8 (other)
INFO[0000] network: updated default interface en0, index 14, type wifi
TRACE[0000] inbound/tun[0]: creating stack
INFO[0000] inbound/tun[0]: started at utun9
(packet-tunnel) error: start service: post-start inbound/tun[0]: starting tun stack: listen tcp4 172.19.0.1:0: bind: can't assign requested address
(packet-tunnel) stopping, reason: NEProviderStopReason (rawValue: 1)

Supporter

• I am a sponsor

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.

Start by reproducing the minimal tun inbound configuration on macOS 15.2 and inspect the inbound/tun startup path described in the logs. The reported failure occurs while starting the TUN stack and binding 172.19.0.1:0; done means identifying why that address cannot be assigned and documenting or correcting the behavior.