{
  "port": 2041,
  "protocol": "both",
  "service": "interbase (registration name only)",
  "oneLiner": "Named \"interbase\" in the registry, but the InterBase/Firebird database actually lives on 3050.",
  "whatItIs": "IANA lists the service name interbase on TCP and UDP 2041 with no description, assignee or reference. The database engine the name suggests does not use it: Borland InterBase and its open-source descendant Firebird use the registered gds-db service on port 3050, which is what their servers bind by default. So 2041 is a historical name with no protocol documented and no common software behind it — Nmap sees it open on about 0.02% of hosts.",
  "exposure": {
    "verdict": "careful",
    "note": "Do not assume a database. A listener here is unidentified; if you are actually looking for InterBase or Firebird, check 3050 instead."
  },
  "checkCommand": "sudo lsof -nP -iTCP:2041 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml",
      "kind": "iana"
    },
    {
      "title": "Firebird — the InterBase-derived open source database",
      "url": "https://firebirdsql.org/",
      "kind": "official-docs"
    }
  ]
}