{
  "port": 306,
  "protocol": "tcp",
  "service": "Unassigned",
  "oneLiner": "Unassigned by IANA; anything listening is a local or vendor-specific choice.",
  "whatItIs": "IANA has no registration for 306, and no public protocol claims it. Nmap lists it as \"unknown\" while still including it in wide scans because a measurable share of hosts answer, which usually points at embedded devices or a niche product rather than anything standardised. Do not read a service into the number — there is not one to read. The only honest answer is the registration status plus a service probe.",
  "exposure": {
    "verdict": "careful",
    "note": "No registered protocol means no assumption of authentication or encryption; probe it and treat it as untrusted until identified."
  },
  "checkCommand": "nmap -sV -p 306 TARGET",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 306",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=306",
      "kind": "iana"
    }
  ]
}