{
  "port": 40911,
  "protocol": "tcp",
  "service": "Unassigned",
  "oneLiner": "Unregistered and rare — Nmap finds it open on roughly two hosts in ten thousand.",
  "whatItIs": "There is no IANA registration for 40911 and no service name in Nmap's database, which measures its open frequency at about 0.02%, near the bottom of the ports Nmap bothers to scan by default. Nothing conventional runs here, so an open port is either a bespoke service or an ephemeral socket in the Linux 32768-60999 range. The number itself tells you nothing.",
  "exposure": {
    "verdict": "careful",
    "note": "Rare and unidentified is not the same as harmless; fingerprint the listener before making any exposure decision."
  },
  "checkCommand": "nc -vz -w 3 TARGET 40911",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 40911",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=40911",
      "kind": "iana"
    },
    {
      "title": "nmap/nmap — nmap-services (port frequency database)",
      "url": "https://github.com/nmap/nmap/blob/master/nmap-services",
      "kind": "github"
    }
  ]
}