FTP Control Protocol

Detection Information

The following page provides information on the FTP Control Protocol.

Protocol Description

FTP is a protocol used to transfer files between computers. The control portion of the file transfer typically happens on TCP port 21, while the data transfer happens on TCP port 20 or potentially other ports.

Full Name

File Transfer Protocol (Control)


FTP Control


Version 2.88

Best Practices

FTP is an old school protocol that has been around since the early 1970s. Unlike the encrypted FTPS protocol, the basic FTP protocol uses clear text passwords so user authentication should be avoided in this mode.

Port Statistics

IP Protocol Flow Percent
TCP 2121 62%
TCP 21 38%

Port Reference - RFC

  • TCP 21 - File Transfer Protocol [Control]


File Server

External Resources

Protocol Detection

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Related Protocols

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

File Server

NFS Details

File Server

Windows SMB v1 Details

File Server

FTPS Control Details

File Server

Windows SMB v2/v3 Details

File Server

TFTP Details

File Server

Apple File Services Details

File Server

Rsync Details

File Server

FTP Data Details

File Server

FTPS Data Details

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