{
  "type": "tun",
  "tag": "tun-in",
  "interface_name": "singbox_tun",
  "inet4_address": "172.19.0.1/30",
  "inet6_address": "fdfe:dcba:9876::1/126",
  "mtu": 9000,
  "auto_route": true,
  "strict_route": false,
  "stack": "system",
  "sniff": true
}