{
  "port": 3017,
  "protocol": "both",
  "service": "event-listener (registered)",
  "oneLiner": "Registered to IANA as Event Listener, with no public protocol behind the name.",
  "whatItIs": "IANA holds 3017 as event-listener — registered originally as \"event_listener\" and later given the well-formed name event-listener, so both appear in service tables. There is no reference document, vendor page, or known open implementation, and the port is uncommon in scan data. The generic name attracts confusion: many unrelated applications describe their own callback socket as an event listener without any connection to this assignment.",
  "exposure": {
    "verdict": "careful",
    "note": "The name says nothing about what is running — identify the process, because an event-callback socket that accepts arbitrary input is worth reviewing before exposure."
  },
  "checkCommand": "sudo lsof -nP -iTCP:3017 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 3017 (event-listener)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3017",
      "kind": "iana"
    }
  ],
  "ianaName": "event-listener"
}