Windows SMB v1 Protocol

Detection Information

The following page provides information on the 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



Best Practices

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.

Port Statistics

IP Protocol Flow Percent
TCP 445 100%


File Server

External Resources

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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Related Protocols

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

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FTP Control ftp-control Details

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FTP Data ftp-data Details

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Rsync rsync Details

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