sing-box-extended/examples/vpn/server-client/server.json

{
  "log": {
    "level": "info"
  },
  "dns": {
    "servers": [
      {
        "type": "local",
        "tag": "default"
      }
    ]
  },
  "endpoints": [
    {
      "type": "vpn-server",
      "tag": "vpn",
      "address": "10.0.0.1",
      "users": [
        {
          "address": "10.0.0.2",
          "key": "1c9b2ccf-b0c0-4c26-868d-a55a4edad3fe"
        }
      ],
      "inbounds": [
        {
          "type": "vless",
          "tag": "vless-in",
          "listen": "0.0.0.0",
          "listen_port": 8000,
          "users": [
            {
              "name": "vless",
              "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
            }
          ]
        }
      ]
    }
  ],
  "inbounds": [
    {
      "type": "mixed",
      "tag": "mixed-in",
      "listen_port": 10000
    }
  ],
  "outbounds": [
    {
      "type": "direct",
      "tag": "direct-out"
    }
  ],
  "route": {
    "rules": [
      {
        "outbound": "vpn",
        "override_gateway": "10.0.0.2"
      }
    ],
    "final": "direct-out",
    "default_domain_resolver": "default",
    "auto_detect_interface": true
  }
}