{
  "port": 888,
  "protocol": "tcp",
  "service": "AccessBuilder / CDDB",
  "oneLiner": "Registered to 3Com AccessBuilder, remembered for CDDB, and used today as an alternate HTTP port.",
  "whatItIs": "IANA's formal assignment for 888 is \"AccessBuilder\", a 3Com remote-access product from the 1990s. The registry carries a second entry for cddbp, the CD Database Protocol, explicitly annotated as recording an unassigned but widespread use: CD players queried CDDB/freedb here for album track listings before that ecosystem moved to HTTP-based services. Neither is meaningfully deployed now. In practice an open 888 is a hand-configured web or admin service, which is why Nmap sees it open relatively often.",
  "exposure": {
    "verdict": "careful",
    "note": "The historical protocols are gone; what is actually listening is typically an alternate HTTP or admin interface, so judge it on that service's authentication."
  },
  "checkCommand": "nmap -sV -p 888 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"
    }
  ]
}