{
  "port": 5033,
  "protocol": "tcp",
  "service": "jtnetd-server",
  "oneLiner": "Registered as Janstor Secure Data — a vendor port you are unlikely to meet in the wild.",
  "whatItIs": "IANA assigns 5033/tcp to jtnetd-server, \"Janstor Secure Data\"; the UDP side is simply Reserved. There is no public specification and no widely deployed implementation, and scanners record it with a very low hit rate. If you find something on 5033 it is far more likely to be an unrelated application that chose the number than a Janstor deployment.",
  "exposure": {
    "verdict": "careful",
    "note": "Treat it as unknown: fingerprint the listener before exposing it, since the registration tells you nothing about its authentication or encryption."
  },
  "checkCommand": "sudo lsof -nP -iTCP:5033 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA port registry — 5033 (jtnetd-server)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5033",
      "kind": "iana"
    }
  ]
}