Windows SMB v1 Protocol

Protocol Description

The Server Message Block (SMB) protocol provides file and print services to systems on the network. Though primarily used by Microsoft Windows systems, macOS, Linux and other operating systems also support the protocol.

Full Name

Server Message Block Version 1

Abbreviation

SMBv1

ProTips

The SMBv1 protocol was developed in the 1980s and has past its prime. The protocol is insecure and a security incident waiting to happen. If you see this protocol on your network, please take action.

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

Related Protocols

A list of related protocols is below. List of all protocols.
Category Name

File Server

Windows SMB v2/v3 Details

File Server

TFTP Details

File Server

Apple File Services Details

File Server

FTP Control Details

File Server

NFS Details

File Server

Rsync Details

File Server

FTP Data Details

Protocol Detection

Do you know how much Windows SMB v1 traffic flows through your network? Netify's protocol detection engine and reporting provides insights to help manage your network.

What gets measured, gets managed.

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Integration and Custom Solutions

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