{
  "port": 625,
  "protocol": "tcp",
  "service": "dec-dlm / Apple ODProxy",
  "oneLiner": "Registered to DEC's distributed lock manager, but on a Mac it is Open Directory Proxy.",
  "whatItIs": "IANA registers 625 as dec-dlm (previously spelled dec_dlm), the Digital Equipment Corporation Distributed Lock Manager from the VMS cluster era, which you will not encounter today. The number is widely reported on macOS as Open Directory Proxy — odproxyd, which relays directory lookups for a Mac bound to an Open Directory domain — but Apple publishes no documentation for the port, so treat that as a field observation and confirm it against the running process rather than the registry name.",
  "exposure": {
    "verdict": "never",
    "note": "If this is Open Directory Proxy, it answers questions about your account namespace and belongs on a managed LAN; if it is something else, you do not know what it is until you identify the process."
  },
  "checkCommand": "nc -vz -w 3 TARGET 625",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 625",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=625",
      "kind": "iana"
    }
  ]
}