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In this article Xiaobian for you to introduce in detail "what is the port of ftp in linux", the content is detailed, the steps are clear, and the details are handled properly. I hope that this article "what is the port of ftp in linux" can help you solve your doubts.

In linux, the ports used by ftp are "20" and "21", in which port 20 is used to transfer data and port 21 is used to transfer control information; ftp server is used to store files, and users can use FTP client to access resources located on FTP server through FTP protocol.

The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is the ftp port in linux

The FTP protocol uses ports 20 and 21 of the TCP ports, of which 20 is used to transmit data and 21 is used to transmit control information.

FTP is one of the earliest protocols used in the TCP/IP network and internet, which belongs to the application layer of the network protocol group. it is a protocol that two computers transfer files on the TCP/IP network. The FTP client can issue commands to the server to download files, upload files, and create or change directories on the server.

It is much more complicated than the HTTP,FTP protocol. The reason for the complexity: because the FTP protocol uses two TCP connections, one is the command link, which is used to pass commands between the FTP client and the server, and the other is the data link, which is used to upload or download data. FTP is based on the TCP protocol, so you only need to release the TCP protocol of the specified port in the iptables firewall setting.

Ftp: is one of the protocols in the TCP/IP protocol group.

The ftp:ftp server is used to store files, and users can use the FTP client to access resources located on the FTP server through the FTP protocol.

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