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Telnet is a network protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communications facility using a virtual terminal connection. User data is interspersed in-band with its control information in an 8-bit byte oriented data connection over the Transmission Control Protocol (TCP).
Historically, Telnet provided access to a command-line interface (usually, of an operating system) on a remote host. Most network equipment and operating systems with a TCP/IP stack support a Telnet service for remote configuration (including systems based on Windows NT).
Telnet works on the application layer of the Internet Protocol Suite. It is a client-server protocol, based on a reliable connection-oriented transport. Typically this protocol is used to establish a connection to Transmission Control Protocol (TCP) port number 23, where a Telnet server application (telnetd) is listening.
As said above, Windows NT based machine could perform it. This could be performed quite easy. But before we perform telnet to other system, we need to make sure that both of the local and the remote computer enable Windows Telnet services. To enable Windows Telnet service, follow these steps :
- Open Services control panel (Ctrl + R >> type in “services.msc” >> Hit Enter).
- Find “Telnet” and double click it.
- If it is disabled, you must enable it first, I recommend you to choose “Manual” because we don’t need it to be activated automatically. You can turn Windows telnet off again after doing telnet manually.
- Press Start button and wait the process. Click OK.
We’re done with Windows Telnet service activation. Once again, you must enable telnet service on both computer so your telnet commands could work.
One more thing to do before performing windows telnet is making sure that the remote computer must have a username with a password. If the username has no password, then you will experience logging in problem since it requires password for
logging in. I assume that you know how to set password for Windows user. It seems all requirements are complete. Now, it’s time to perform telnet commands. First, open your cmd. You can open it from the Run command. For example, I want to telnet a remote computer with IP address 192.168.1.2. Then, I type this telnet commands in my cmd :
telnet 192.168.1.2
We wait for the connecting process. If the telnet commands successfully connect to the remote computer, your cmd should display a login screen. Then, you type the username and also the password. After logging in, you will have the remote computer shell. From this point, you could try some commands such as checking the existing user, listing folders and files, etc. This Windows telnet features is very useful for learning computer networks, network support, and remote maintenance purpose.
To disconnect window telnet connection, you just simply push Ctrl + C button combination or type “exit”. You will be in your system shell again.
Reference : wikipedia
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