{
  "port": 49400,
  "protocol": "tcp",
  "service": "compaqdiag (Compaq/HP web-based management)",
  "oneLiner": "Unregistered, but long associated with Compaq/HP web-based server management agents — nmap calls it compaqdiag.",
  "whatItIs": "49400 sits in the Dynamic/Private range, so it has no IANA assignment. Its one durable association is historical: Nmap's service database names it compaqdiag, \"Compaq Web-based management\", from the era of Compaq/HP Insight Management agents on ProLiant servers. If you find it open today it is on old server hardware or an appliance descended from that management stack, and it should be identified with a version scan rather than trusted to the name.",
  "exposure": {
    "verdict": "never",
    "note": "Server management agents are an administrative plane on legacy, usually unpatched software; keep them on a management VLAN, never on a public IP."
  },
  "checkCommand": "nmap -Pn -sV -p 49400 TARGET",
  "links": [
    {
      "title": "Nmap source repository (nmap-services, where 49400 is listed as compaqdiag)",
      "url": "https://github.com/nmap/nmap",
      "kind": "github"
    },
    {
      "title": "RFC 6335 — IANA Procedures for Service Name and Transport Protocol Port Number Registry",
      "url": "https://www.rfc-editor.org/rfc/rfc6335.html",
      "kind": "spec"
    }
  ]
}