{
  "port": 3809,
  "protocol": "tcp",
  "service": "APOC configuration agent (registered)",
  "oneLiner": "Registered to Sun's Java Desktop System configuration agent, a product line that shipped on different ports and is long dead.",
  "whatItIs": "IANA registers 3809 as apocd, the Java Desktop System Configuration Agent from Sun's desktop-policy stack (APOC, later Sun Desktop Manager). Oracle's own documentation for that agent gives 38900 for client connections and 38901 for the admin controller port, so the 3809 registration never matched what the software actually bound. The product line is discontinued and you will not meet it on a modern network. A listener here is almost certainly something unrelated that picked a free high port.",
  "exposure": {
    "verdict": "never",
    "note": "Nothing standard serves this port, so an internet-facing listener on 3809 is an unidentified service — identify it before you decide anything else about it."
  },
  "checkCommand": "sudo lsof -nP -iTCP:3809 -sTCP:LISTEN",
  "links": [
    {
      "title": "Oracle — Java Desktop System Configuration Manager: Configuration Agent",
      "url": "https://docs.oracle.com/cd/E19253-01/817-7575/eypje/index.html",
      "kind": "official-docs"
    },
    {
      "title": "IANA port registry — 3809 (apocd)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3809",
      "kind": "iana"
    }
  ],
  "ianaName": "apocd"
}