{
  "port": 50300,
  "protocol": "tcp",
  "service": "Unassigned (dynamic range)",
  "oneLiner": "No registration, no known service — a rarely-seen port in the private range.",
  "whatItIs": "50300 falls above 49151, so it is Dynamic/Private space that RFC 6335 forbids IANA from assigning. Nmap's service database lists it as unknown for both TCP and UDP with a very low frequency, meaning it is genuinely uncommon on internet-wide scans rather than merely unnamed. If you see it open, it belongs to something local and specific, and only the host's process table will tell you what.",
  "exposure": {
    "verdict": "careful",
    "note": "Nothing standard lives here, so there is no baseline to compare against; identify the owning process before making any allow decision."
  },
  "checkCommand": "sudo lsof -nP -iTCP:50300 -sTCP:LISTEN",
  "links": [
    {
      "title": "RFC 6335 — IANA Procedures for Service Name and Transport Protocol Port Number Registry",
      "url": "https://www.rfc-editor.org/rfc/rfc6335.html",
      "kind": "spec"
    },
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml",
      "kind": "iana"
    }
  ]
}