FTP ports range, how to block FTP in network?

  Protocol:
FTP
Support: WFilter zh.4.0, WFilter en.4.0, WFilter Free 1.0
  Author: imfirewall  
      FTP (File Transfer Protocol) is used to transfer data from one computer to another over the Internet, or through a network.  

This protocol is official supported and installed by default.

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     User name:3.144.251.225
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FTP uses TCP protocol for communication.

TCP traffic analysis

Ports Range

Dynamic ports, no fixed port found.

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