{
  "port": 10012,
  "protocol": "tcp",
  "service": "Unassigned",
  "oneLiner": "No IANA registration; a plain unclaimed high port.",
  "whatItIs": "IANA has no assignment for 10012, and Nmap's service database lists it as unknown, open on about 0.04% of scanned hosts. Nothing widely deployed defaults here. A listener is an application, agent, or published container port that took the next free number, so identify it by probing rather than by the number.",
  "exposure": {
    "verdict": "careful",
    "note": "No registration, no assumed protocol, no assumed authentication. Establish what owns the socket before exposing it."
  },
  "checkCommand": "sudo lsof -nP -iTCP:10012 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA port registry — 10012 (no assignment)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=10012",
      "kind": "iana"
    },
    {
      "title": "nmap-services — Nmap's port frequency database",
      "url": "https://github.com/nmap/nmap/blob/master/nmap-services",
      "kind": "github"
    }
  ]
}