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Port 138 netbios-dgm (UDP)

NetBIOS datagram (UDP)

Used by Windows (and services on UNIX like SAMBA). The main danger on the Internet is that by crafting special messages sent to this port, a hacker can convince Windows that their machine is "local", and can therefore bypass some of Microsoft's security settings that differentiate between "local" and "internet" zones.

  • Microsoft Ports