Port with the port number on which the service runs (for example, 80 for http). Replace host with the address of the service, and To use these clients, go to their respective command lines (that is, the Terminal application in macOS, the shell in Unix or Linux, or the DOS prompt in Windows), and then enter: telnet host port Telnet clients are available for all major operating systems.Ĭommand-line telnet clients are built into most versions of macOS, Windows, Unix, and Linux. Since there are times when the Telnet client must talk to the Telnet server (and vice versa) there needs to be some way to. In most cases, you'll need to log into the remote host, which requires that you have an account on that system. Once your telnet client establishes a connection to the remote host, your client becomes a virtual terminal, allowing you to communicate with the remote host from your computer. Using telnet client software on your computer, you can make a connection to a telnet server (that is, the remote host). Telnet is a protocol that allows you to connect to remote computers (called hosts) over a TCP/IP network (such as the SSH is similar to telnet, but is far more secure see About SSH. It is a client-server protocol that provides the user a terminal session to the remote host from the telnet client application.

It was initally released in the early days of IP networking in 1969, and was for a long time the default way to access remote networked computers. Telnet is used for the interactive communication of data and commands between client and server over a prolonged period of time, and is thus strongly based on the concept of a session. TCP Sessions and Client/Server Communication. SSH is required to establish remote terminal connections to Indiana University's central systems. Telnet is one of the earliest remote login protocols on the Internet. The Telnet server is a program running on a remote computer that has been set up to allow remote sessions.

Telnet server vs client