// REFERENCE
Port 138 (NetBIOS Datagram)
Protocol: UDP
Service: NetBIOS-DGM
Medium risk
NetBIOS datagram service, used by the legacy Windows network browser. Like the rest of NetBIOS, it's internal LAN traffic that must not be exposed.
Related tools
Work with this in:
Related
111
Port 111 (RPCbind / Portmapper) 135
Port 135 (MSRPC) 137
Port 137 (NetBIOS Name) 1883
Port 1883 (MQTT) 2375
Port 2375 (Docker API) 2376
Port 2376 (Docker API TLS)
Port 111 (RPCbind / Portmapper) 135
Port 135 (MSRPC) 137
Port 137 (NetBIOS Name) 1883
Port 1883 (MQTT) 2375
Port 2375 (Docker API) 2376
Port 2376 (Docker API TLS)
Assignments per the IANA port registry. Educational content.