{
  "port": 54045,
  "protocol": "tcp",
  "service": "Unassigned (dynamic range)",
  "oneLiner": "No registration and no documented service — a number Nmap probes and nothing claims.",
  "whatItIs": "54045 is inside the Dynamic/Private range, so there is no IANA record for it and never will be under RFC 6335. Nmap's nmap-services lists TCP at 0.000228 and UDP at 0.001004, keeping it in the default top-1000 TCP scan. The SANS ISC port page leaves the service field blank; the only attributions there are unsourced visitor comments, which are not evidence. Treat a listener here as an unidentified local application.",
  "exposure": {
    "verdict": "careful",
    "note": "Nothing is known about what runs here, so nothing about its authentication or encryption can be assumed. Identify first, expose never-by-default."
  },
  "checkCommand": "sudo lsof -nP -iTCP:54045 -sTCP:LISTEN",
  "links": [
    {
      "title": "RFC 6335 — Dynamic Ports (49152-65535)",
      "url": "https://www.rfc-editor.org/rfc/rfc6335.html",
      "kind": "spec"
    },
    {
      "title": "IANA port registry — search 54045",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=54045",
      "kind": "iana"
    },
    {
      "title": "Nmap Reference Guide — the nmap-services file",
      "url": "https://nmap.org/book/nmap-services.html",
      "kind": "official-docs"
    }
  ]
}