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class="entry-content"><div class="addtoany_share_save_container addtoany_content addtoany_content_top"><div class="a2a_kit a2a_kit_size_16 addtoany_list" data-a2a-url="https://www.engineersgarage.com/ssh-file-transfer-protocol-iot-part-45/" data-a2a-title="SSH File Transfer Protocol – IOT Part 45"><a class="a2a_button_facebook" href="https://www.addtoany.com/add_to/facebook?linkurl=https%3A%2F%2Fwww.engineersgarage.com%2Fssh-file-transfer-protocol-iot-part-45%2F&linkname=SSH%20File%20Transfer%20Protocol%20%E2%80%93%20IOT%20Part%2045" title="Facebook" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_x" href="https://www.addtoany.com/add_to/x?linkurl=https%3A%2F%2Fwww.engineersgarage.com%2Fssh-file-transfer-protocol-iot-part-45%2F&linkname=SSH%20File%20Transfer%20Protocol%20%E2%80%93%20IOT%20Part%2045" title="X" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_linkedin" href="https://www.addtoany.com/add_to/linkedin?linkurl=https%3A%2F%2Fwww.engineersgarage.com%2Fssh-file-transfer-protocol-iot-part-45%2F&linkname=SSH%20File%20Transfer%20Protocol%20%E2%80%93%20IOT%20Part%2045" title="LinkedIn" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_reddit" href="https://www.addtoany.com/add_to/reddit?linkurl=https%3A%2F%2Fwww.engineersgarage.com%2Fssh-file-transfer-protocol-iot-part-45%2F&linkname=SSH%20File%20Transfer%20Protocol%20%E2%80%93%20IOT%20Part%2045" title="Reddit" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_pinterest" href="https://www.addtoany.com/add_to/pinterest?linkurl=https%3A%2F%2Fwww.engineersgarage.com%2Fssh-file-transfer-protocol-iot-part-45%2F&linkname=SSH%20File%20Transfer%20Protocol%20%E2%80%93%20IOT%20Part%2045" title="Pinterest" rel="nofollow noopener" target="_blank"></a><a class="a2a_dd addtoany_share_save addtoany_share" href="https://www.addtoany.com/share"></a></div></div><p style="text-align: justify;">In the <a href="https://www.engineersgarage.com/automatic-software-update-by-iot-device-over-ftp-protocol-iot-part-44/">previous tutorial</a>, it was seen how<a href="https://www.engineersgarage.com/Articles/File-Transfer-Protocol-IoT" target="_blank" rel="noopener noreferrer"> FTP protocol </a>can be used to update application software on an IoT device. However, FTP protocol has some security concerns as it is vulnerable to several kind of attacks like Brute force attack, FTP bounce attack, Packet capture, Port stealing (guessing the next open port and usurping a legitimate connection), Spoofing attack, Username enumeration etc. Therefore, secure variants of FTP protocols were developed. SSH File Transfer Protocol is one of the secure variants of the FTP protocol.</p> <p><img decoding="async" title="Symbol of SSH File Transfer Protocol (SFTP)" src="https://www.engineersgarage.com/wp-content/uploads/2019/07/Symbol-SSH-File-Transfer-Protocol-SFTP.jpg" alt="Symbol of SSH File Transfer Protocol (SFTP)" /></p> <p style="text-align: center;"><span style="font-family: verdana,geneva,sans-serif;"><em>Fig. 1: Symbol of SSH File Transfer Protocol (SFTP)</em></span></p> <div style="text-align: justify;">SSH File Transfer Protocol / Secure File Transfer Protocol (SFTP) was designed for file access, transfer and management over a reliable and secure data stream. It was designed by Internet Taskforce (IETF) to provide secure file transfer capability. Later on, IETF stated that it was designed as an extension to SSH (Secure shell) for transferring the files over a secure connection using TLS.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;"><strong>Why need SFTP – </strong></div> <div style="text-align: justify;"></div> <div style="text-align: justify;">The FTP was used to transfer files but not over a secure channel, So SFTP was developed. It is not likely a FTP protocol over SSH, it is a new protocol which supports many file operations over network. It gives easy but safe access to files over remote connection. It can also be used like SSH-1 and SSH-2.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;"><strong>SFTP Features –</strong></div> <div style="text-align: justify;"></div> <div style="text-align: justify;">SFTP comes with many advantages over FTP like</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">1. Resume interrupted file transfers</div> <div style="text-align: justify;">2. Remote file removal</div> <div style="text-align: justify;">3. Directory listing</div> <div style="text-align: justify;">4. File management on the server</div> <div style="text-align: justify;">5. Platform Independence</div> <div style="text-align: justify;">6. Upload stamp i.e. Uploaded files may be associated with their basic attributes, such as time stamps. This is an advantage over the common FTP protocol.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;"><strong>SFTP Software –</strong></div> <div style="text-align: justify;"></div> <div style="text-align: justify;">Like any other protocol, SFTP is also based on client server model, So, there are some server-client software required for implementation of the protocol.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">SFTP Client – The client is a command line based software where a user can use traditional tools like secure shell and PUTTY but that totally depends on what the server supports.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">Some commonly used SFTP client programs are as follow –</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">1) WinSCP: It is free and open source SFTP GUI client. Despite its name it’s not limited to SCP, but works with SFTP and FTP/SSL too.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">2) Filezilla Client: It is free and open source FTP, FTP/SSL and SFTP GUI client (beware of adware).</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">3) Bitvise SSH Client: It is a SSH tunneling, SSH terminal emulation and SFTP client. It is available as commercial application.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">4) JSCAPEAny Client: It is a Web-based SFTP/FTP/FTPS/WebDAV/S3 client. It is available as commercial application.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">SFTP Server – SFTP servers can be implemented on Linux based machines. Some FTP and SSH Server implementation provides SFTP implementation along with their installation and share default port 22 with other SSH services.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">Some popular SFTP server tools are as follow –</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">1) OpenSSH: This is the most widely used SFTP/SSH server on the planet. It is perfect for Linux or *BSD but not so great on Windows. It is an open source tool.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">2) Bitvise SSH Server: It is a SFTP/SSH server for Windows.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">3) Tectia SSH Server: It is an Enterprise SFTP/SSH server from the creators of the SSH protocol.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">4) CrushFTP: It is a file transfer server with support for SFTP, SCP, FTPS and HTTPS.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;">SFTP Proxy – Handling the SFTP traffic over traditional proxies is ineffective for controlling SFTP traffic. There is slandered tool for SFTP proxies that are like “TIS fwtk” or “SUSE FTP proxy”.</div> <div style="text-align: justify;"></div> <div style="text-align: justify;"><strong>Development with SFTP – </strong></div> <div style="text-align: justify;"></div> <div style="text-align: justify;">Client and server libraries for SFTP are written in popular programming languages like, C/C++, .net, java and python. So, developing an application with SFTP is easy and has many resources.</div> <div style="text-align: justify;">In the next tutorial, learn to <a href="https://www.engineersgarage.com/raspberry-pi-server-based-hotel-restaurant-order-management-system-on-iot-iot-part-46/">design an Online Hotel Order Management System using MQTT protocol</a>.</div> <div></div> <hr><span class="entry-categories">Filed Under: <a href="https://www.engineersgarage.com/featured-contributions/" rel="category tag">Featured Contributions</a>, <a href="https://www.engineersgarage.com/tutorials/iot-tutorials/" rel="category tag">IoT tutorials</a>, <a href="https://www.engineersgarage.com/tutorials/" rel="category tag">Tutorials</a></span><br /><br /> <hr><hr /> <nav class="navigation post-navigation" aria-label="Next Article"> <h2 class="screen-reader-text">Next Article</h2> <div class="nav-links"><div class="nav-previous"><a href="https://www.engineersgarage.com/raspberry-pi-server-based-hotel-restaurant-order-management-system-on-iot-iot-part-46/" rel="prev">← Previous Article</a></div><div class="nav-next"><a href="https://www.engineersgarage.com/automatic-software-update-by-iot-device-over-ftp-protocol-iot-part-44/" rel="next">Next Article →</a></div></div> </nav><hr /></div><footer class="entry-footer"></footer></article><section id="custom_html-7" class="widget_text widget widget_custom_html"><div class="widget_text widget-wrap"><div class="textwidget custom-html-widget"></div></div></section> <section id="custom_html-8" class="widget_text widget widget_custom_html"><div class="widget_text widget-wrap"><div class="textwidget custom-html-widget"><center> <div style="display: flex; flex-direction: column; justify-content: center; width: 300px;"> <div align="center"><a href="https://www.engineersgarage.com/subscribe-engineers-garage-newsletter/" target="_blank"><img src="https://www.engineersgarage.com/wp-content/uploads/2023/03/EG-300x100-1.jpg" alt=“engineers garage newsletter”></a></div> <div align="center" style="width: 300px; line-height: 20px; padding-top: 10px;"><span style="font-weight: bold; color: #0c506d; text-align: center; font-size: 20px;">EXPAND YOUR KNOWLEDGE AND STAY CONNECTED</span></div> <div align="center" style="line-height: 16px; padding-top: 5px;"><span style="text-align: center; font-size: 16px;">Get the latest info on technologies, tools and strategies for EE professionals.</span></div> <div align="center" style="padding-top: 10px;"><a href="https://www.engineersgarage.com/subscribe-engineers-garage-newsletter/" target="_blank"><button style="background-color: #57bf9b; color: white; font-weight: bold; border: none; padding: 10px; font-size: 16px; cursor: pointer;">GET THE ENEWSLETTER</button></a></div> </div> </center></div></div></section> </main><aside class="sidebar sidebar-primary widget-area" role="complementary" aria-label="Primary Sidebar"><section id="search-2" class="widget widget_search"><div class="widget-wrap"><form class="search-form" method="get" action="https://www.engineersgarage.com/" role="search"><input class="search-form-input" type="search" name="s" id="searchform-1" placeholder="Search this website"><input class="search-form-submit" type="submit" value="GO"><meta content="https://www.engineersgarage.com/?s={s}"></form></div></section> <section id="custom_html-5" class="widget_text widget widget_custom_html"><div class="widget_text widget-wrap"><div class="textwidget custom-html-widget"><div align="center"> <div id='div-gpt-eg_sidebar1'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-eg_sidebar1'); }); </script> </div> </div></div></div></section> <section id="custom_html-20" class="widget_text widget widget_custom_html"><div class="widget_text widget-wrap"><h4 class="widget-title widgettitle">EE TECH TOOLBOX</h4> <div class="textwidget custom-html-widget"><center> <div style="display: flex; flex-direction: column; justify-content: center; width: 300px;"> <div align="center"><a href="https://www.eeworldonline.com/tech-toolbox-test-measurement/" target="_blank"><img src="https://www.eeworldonline.com/wp-content/uploads/2024/11/EE-TechToolbox-T_and_M_Page_01-scaled.jpg" alt=“ee tech toolbox”></a></div> <div align="center" style="width: 300px; line-height: 20px; padding-top: 10px;"><span style="font-weight: bold; color: #0c506d; text-align: center; font-size: 20px;">Tech Toolbox: Test & Measurement</span></div> <div align="center" style="line-height: 16px; padding-top: 5px;"><span style="text-align: center; font-size: 16px;"> Everything needs testing and testing needs measurement. 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