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What is TCP port 23?
TCP port 23 is often referred to as Telnet. Telnet is a network protocol used for remote access to computers or devices over a network. It allows a user to establish a command-line session on a remote host system.
The Basics of Telnet
Telnet is a client-server protocol. The client sends commands to the server, which executes them and responds back to the client. It is primarily used for text-based communication and does not support modern graphical user interfaces (GUIs).
Functions and Features of Telnet
Telnet provides users with the ability to log in to a remote computer or device and access the command-line interface (CLI) or text-based programs available on that system. It can be used to manage and configure network devices, troubleshoot various issues, or remotely control a device.
How Does Telnet Work?
When a user initiates a Telnet connection, the client establishes a TCP connection with the Telnet server on port 23. Once the connection is established, the client sends commands to the server, which executes them and sends the output back to the client.
Common Uses and Alternatives
Telnet was widely used in the past for remote management and configuration of devices. However, due to its lack of security and encryption, it has become less popular and is often replaced by more secure protocols such as SSH (Secure Shell).
In Conclusion
TCP port 23 (Telnet) allows remote access to computer systems and devices over a network, enabling users to manage and control remote systems via a command-line interface. It is important to note that due to its inherent security vulnerabilities, Telnet is recommended to be used in secure and trusted network environments only.
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