{
  "port": 10621,
  "protocol": "both",
  "service": "Unassigned",
  "oneLiner": "Unassigned by IANA, no known squatter — whatever answers here is site-local.",
  "whatItIs": "10621 falls inside the unassigned gap between Apple's `serverdocs` at 10548 and `printopia` at 10631, and Nmap's service list records it as `unknown` on both TCP and UDP. There is no product convention, malware family, or scanner signature publicly tied to this number. In practice ports in the 10000-11000 band get picked by hand for internal services because the famous neighbours — Webmin and NDMP on 10000, Zabbix on 10050/10051 — made the range familiar to admins. Treat the number as meaningless and read the banner.",
  "exposure": {
    "verdict": "careful",
    "note": "Unknown service, unknown auth. Check what is actually listening (`ss -ltnp` on the host) before you open a firewall rule for it."
  },
  "checkCommand": "nmap -Pn -sV -p 10621 TARGET",
  "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"
    }
  ]
}