{
  "port": 2251,
  "protocol": "tcp",
  "service": "Distributed Framework Port",
  "oneLiner": "An IANA registration with no public protocol behind it.",
  "whatItIs": "IANA registers 2251 as dif-port, \"Distributed Framework Port\". No specification was published with the registration and no commonly deployed software defaults here, so the entry is a reserved name rather than a protocol you will meet on a scan. A listener on 2251 is best identified by process, not by the registry.",
  "exposure": {
    "verdict": "careful",
    "note": "Unknown service: find out what bound the port and whether it authenticates before exposing anything."
  },
  "checkCommand": "sudo lsof -nP -iTCP:2251 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 2251 (dif-port)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=2251",
      "kind": "iana"
    }
  ],
  "ianaName": "dif-port"
}