
Additionally, PuTTY acts as a secure SSH tunnel for X11. Apart from the basic serial terminal communications, SSH, telnet and rlogin, it can also initiate secure file transfers via SCP and SFTP. A free, open-source terminal application, PuTTY is easily customizable and highly configurable. It is important to note that the developer underlines that the use of the app is illegal in various countries where encrypted is outlawed. PuTTY, an open-source and free terminal application. At the same time, the application allows you to connect to a specific port and packs several options that can only be applied to an SSH connection, such as X11 forwarding, serial configuration, compression or Dynamic SOCKS-based port forwarding, for instance. PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an XTerm. Unlike PuTTY which comes with a GUI that permits you to handle the communication, this app can be used with PowerShell or Command Line. Therefore, you could be sitting at one PC and giving commands for others thanks to these protocols via the standard client and server principle. The idea of PuTTY and Plink is to act as a terminal and facilitate the communications – meaning the responses and commands between two machines – over the network. SSH, Telnet and Rlogin are three ways of doing the same thing: logging in to a multi-user computer from another computer, over a network. In other words, the utility allows you to connect to a specified port and acts as a command for the PuTTY backends.

Plink is a lightweight utility designed to provide you with a simple command line SSH, Telnet and Rlogin client.
