{
  "port": 4449,
  "protocol": "tcp",
  "service": "PrivateWire (IANA registration)",
  "oneLiner": "Registered to the PrivateWire VPN product of the 1990s; effectively extinct today.",
  "whatItIs": "IANA carries 4449 as PrivateWire, registered by Uri Resnitzky for an early commercial encrypted-tunnel product. The software is long gone from the market and there is no public protocol specification. An open 4449 today is far more likely to be an in-house or bespoke service that took the number than an actual PrivateWire gateway.",
  "exposure": {
    "verdict": "careful",
    "note": "The registration tells you nothing useful — fingerprint the listener before deciding whether it belongs on a public address."
  },
  "checkCommand": "nc -vz -w 3 TARGET 4449",
  "links": [
    {
      "title": "IANA port registry — 4449 (privatewire)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=4449",
      "kind": "iana"
    }
  ]
}