{
  "port": 3880,
  "protocol": "tcp",
  "service": "IGRS",
  "oneLiner": "IGRS — the Chinese home-networking standard for device discovery and resource sharing between PCs, phones and consumer electronics.",
  "whatItIs": "IANA registers 3880 to IGRS, Intelligent Grouping and Resource Sharing, a protocol suite developed by the IGRS Working Group from 2003. It lets information appliances, PCs, and consumer-electronics devices on one local network discover each other, group, and share resources and services — the same problem space as UPnP or DLNA. IGRS 1.0 became a Chinese national industry standard in 2005 and its parts were later published through ISO/IEC. In practice you meet it only on Chinese-market consumer devices, and only on the LAN.",
  "exposure": {
    "verdict": "never",
    "note": "A LAN discovery and resource-sharing protocol designed for a trusted home network; exposing it publicly advertises the device and its shared resources to the internet."
  },
  "checkCommand": "nc -vz TARGET 3880",
  "links": [
    {
      "title": "IANA port registry — 3880 (igrs)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3880",
      "kind": "iana"
    }
  ],
  "ianaName": "igrs"
}