NetBIOS Datagram Service (NBDS)

The NetBIOS Datagram Service is part of the NetBIOS-over-TCP protocol suite, see the NetBIOS page for further information.

History

XXX - add a brief description of NBDS history

Protocol dependencies

• UDP: Typically, NBDS uses UDP as its transport protocol. The well known UDP port for NBDS traffic is 138.

Example traffic

XXX - Add example traffic here (as plain text or Wireshark screenshot).

Wireshark

The NBDS dissector is partially functional; it should dissect all of the protocol, but does not reassemble datagrams fragmented at the NBDS layer.

Preference Settings

(XXX add links to preference settings affecting how NBDS is dissected).

Example capture file

XXX - Add a simple example capture file to the SampleCaptures page and link from here. Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.

Display Filter

A complete list of NBDS display filter fields can be found in the display filter reference

Show only the NBDS based traffic:

 nbdgm 

Capture Filter

You cannot directly filter NBDS while capturing. However, as it runs atop UDP port 138, you can filter on that port.

Capture NBDS traffic:

 udp port 138 

External links

• RFC1001 Protocol Standard For a NetBIOS Service on a TCP/UDP Transport: Concepts and Methods

• RFC1002 Protocol Standard For a NetBIOS Service on a TCP/UDP Transport: Detailed Specifications

Discussion

Imported from https://wiki.wireshark.org/NetBIOS/NBDS on 2020-08-11 23:17:12 UTC