Sunday, September 25, 2022

Overview of SSH and Telnet

In this article, we want to discuss an overview of SSH and Telnet.

Overview of SSH and Telnet

SSH is known as a secure shell and Telnet is known as a tele-network. Both of these protocols are used to manage servers and network components routers, switches, etc. remotely. The main difference between SSH and Telnet is in the security that is on SSH by default and not on telnet.

The most important difference between Telnet and SSH

Telnet, first introduced in 1969, is more commonly used on private networks, which may not require much encryption of sent commands. But SSH will be used in public networks, where there is an urgent need to protect information and data.

In Telnet communication, data is generally sent by plain text. So naturally, if this is done on an insecure network like the Internet, it could lead to security issues, and anyone could eavesdrop on orders along the way and even steal authentication information such as usernames and passwords.

But the SSH protocol uses special encryption to transmit commands and information, which makes it difficult to eavesdrop in the middle of the road.

The important thing about Telnet is that it does not identify itself. This allows someone else to disrupt the communication and enter the commands they want. But in SSH we have a public key that identifies the data source in each packet. For these security reasons, people today are required to use SSH in public environments to allow some space for security data purposes from each packet that is transmitted. Accordingly, today people need more bandwidth in SSH, which is called overhead which makes it difficult to use SSH if the internet speed is low. But Telnet can use the smallest bandwidth.

Therefore, Telnet security issues have led many people to use SSH instead. But you may be wondering why Telnet still exists?!

Telnet is designed for specific purposes that are still in use. For example, it is used for exams and troubleshooting situations. Of course, several security patches and tools have been developed for Telnet that still fails to provide SSH-level security and can’t be used in all public environments and networks.

Here are other differences between Telnet and SSH.

Similarities and differences between SSH and Telnet

1. SSH and Telnet are both used for the same purposes.

2. SSH is much more secure than Telnet.

3. SSH encrypts the data, while Telnet sends the data in plain text.

4. SSH uses the public key to authenticate. While Telnet has no identification.

5. SSH adds a little to the overall bandwidth cost due to data encryption data within the transmission packets.

6. With Telnet, anything can be done with SSH. But today SSH is used by users for more security.

We hope you enjoy the overview of SSH and Telnet.

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