FM 18-03 Chapter 18 · Reference
Port reference
Well-known and common TCP/UDP ports with IANA service names and notes on services that should never be exposed.
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Accepts 3389 · 514/udp · smb · winrm · kubernetes
Protocol
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Service names from the IANA Service Name and Transport Protocol Port Number Registry. Entries marked common use are conventions IANA does not list for that service. A port number says nothing certain about what is listening: check with the process list (ss -tulpn, Get-NetTCPConnection) before acting.