{
  "port": 9081,
  "protocol": "tcp",
  "service": "Reserved (TCP)",
  "oneLiner": "IANA holds 9081/tcp Reserved, so in practice it is the port the second app server got.",
  "whatItIs": "The registry marks 9081/tcp Reserved and assigns 9081/udp to cisco-aqos. With no TCP assignment, what you find is a local choice — most often the next HTTP port after 9080 when two Java application-server instances share a host, or a sidecar or metrics endpoint of whatever runs on 9080. Its meaning is entirely inherited from its neighbour, so look at 9080 on the same host first.",
  "exposure": {
    "verdict": "careful",
    "note": "Same treatment as the 9080 service it usually accompanies: plain HTTP behind a proxy, never published raw."
  },
  "checkCommand": "curl -sI http://TARGET:9081/",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 9081",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=9081",
      "kind": "iana"
    }
  ]
}