Windows SMB v2/v3

Windows SMB v2/v3 Protocol

Detection Information

The following page provides information on the Windows SMB v2/v3 Protocol.

Protocol Description

The Server Message Block (SMB) protocol provides file and print services to systems on the network. This detection is for version 2 and 3 of the protocol.

Full Name

Server Message Block Version 2 and 3

Abbreviation

SMBv2 / SMBv3

Known Ports

  • TCP 445 - SMB over TCP port.
  • TCP 137 - SMB over TCP port (via NetBIOS).
  • UDP 137 - SMB over UDP port (via NetBIOS).
  • UDP 138 - SMB over UDP port (via NetBIOS).
  • TCP 139 - SMB over TCP port (via NetBIOS).

Category

File Server

External Resources

Protocol Detection

Do you know how much Windows SMB v2/v3 traffic flows through your network? Netify's protocol detection engine and reporting provides insights to help manage your network.

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