{
  "port": 1840,
  "protocol": "tcp",
  "service": "netopia-vo2",
  "oneLiner": "A Netopia voice-product registration from the DSL-router era, with nothing public behind it.",
  "whatItIs": "IANA lists 1840 (TCP and UDP) as \"netopia-vo2\", one of a short run of \"netopia-vo\" assignments made for Netopia, the DSL router and remote-access vendor later absorbed by Motorola and then Arris. No specification was ever published and Netopia's product line is gone, so the registration is a fossil. Nothing in current use binds this port.",
  "exposure": {
    "verdict": "careful",
    "note": "The registration explains nothing about a live listener on 1840 — trace it to a process locally before deciding whether it should be reachable at all."
  },
  "checkCommand": "nc -vz -w 3 TARGET 1840",
  "links": [
    {
      "title": "IANA port registry — 1840",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=1840",
      "kind": "iana"
    }
  ]
}