Understanding FTP Server and Its Functions, Ways and Examples of FTP Server Applications

by Kelvin
Understanding FTP Server and Its Functions, Ways and Examples of FTP Server Applications

Understanding FTP Server

Before discussing about FTP Server we must first understand what is meant by FTP or which has the extension of File Transfer Protocol. File Transfer Protocol (FTP) is the definition of a network protocol typically used for the activity of exchanging data or files using an intermediate TCP connection.

Data exchange activities can be done in two directions, so that all those who are connected can upload and download and vice versa. The data exchange process on FTP also involves two services namely FTP Server and FTP Client.


On this occasion the author will focus more on the discussion on FTP Server, including the understanding, functions and ways of working FTP Server itself. As the name implies FTP Server is the definition of a server or parent device running FTP services (data or file exchange). The existence of this FTP Server has a very vital position and indeed must exist as a condition for the occurrence of FTP services.

FTP Server function

FTP Server function

As a very vital part of an FTP network, the function of the FTP server is also very important in order to be able to provide data or file exchange services according to requests from the FTP Client as the party requesting an FTP connection.

The data exchange process can be done efficiently so that you will not waste too much time waiting for the process. Another function that you can find besides providing data exchange services is to provide implicit remote services on the computer.

Also note that an FTP Server can work well on active and passive connections. The purpose of an active connection is the use of FTP services that can involve outsiders, whereas when using a passive connection the outsiders who will request the service will be directly blocked. This connection setting can be set according to the user's wishes as the FTP Server so that it can filter whether only the FTP Client is involved or outside parties can also access the service.

How to Work FTP Server

Understanding FTP Server and How it Works FTP Server

Because of its vital function, building an FTP network will certainly always involve an FTP Server. All computer users or the term FTP Client are required to have sufficient information about the FTP Server, including a username and password, and do not forget the address to access the FTP Server.

Actually the username and password settings can also be removed or commonly referred to Anonymous Login (Guest OK). This is done to gain free access but for security reasons you can use the settings with a password. The use of this password is often also called Authentication Login. For FTP Server addresses, it is generally set like a domain address.

In general, the work of the FTP Server must wait for the FTP Client request or request a connection. After the two are connected, two-way data exchange can be done, the client can send data to the server and vice versa the server can also send data to the client. This term is known as active and passive mode and we mentioned above. Basically, in both active and passive mode the client will initiate a connection by making a TCP control from port N to FTP Server, more precisely on port 21.

As part of the FTP sending process, you also need to understand that there are 3 types of data transmission methods: compressed, streamed and blocked. By understanding these 3 things, it is believed that using FTP Server will be more efficient. A more complete explanation below:

    In the Compressed method before sending data is compressed first using an algorithm method such as Tun-length Encoding Stream Method when sending the whole process using only TCP so that data can be directly sent continuously and continuously without going through expressing or other processes. Finally the Block method, in this process the data sent will immediately be divided into 3 groups namely block count, block header and block data fields. After this division will be forwarded to TCP for transmission.

FTP Server Application

FTP Server Application (ProFTPD)

FTP Server Application (ProFTPD)

To start using FTP, the first step is to configure FTP Server. But sometimes to shorten the time many users who prefer applications with working principles such as FTP Server such as FileZilla Serve, Proftpd and others. Those who wrestle in the world of computer networks will certainly not feel familiar with the term – the term. You can see the explanation below:

FileZilla Server

At first this application developer presents FileZilla Client, but on the next occasion and on the same project the FileZilla Server appears. This software is an FTP server with the additional feature of doing FTP services via SSL / TLS. The source code on FileZilla Server can usually be found on the website SourceForge.net but can also be found in other sources.


This software is open source and compatible on UNIX / LINUX and operating systems Windows. The advantage of this software is that it is very easy to use and is quite popular among IT and network technicians.


Similar to FileZilla, this software was originally created as an FTP client, but in the next development, Core FTP Server appeared. The use of FTP services in this software is secure (via SSL, TLS, and SFTP).

That is the understanding of FTP Server and the functions and workings of FTP Server. Also discussed are some of the most widely used FTP Server applications. Hopefully useful and easy to understand!

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