Kali Linux remote SSH - How to configure openSSH server

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Secure Shell (SSH) is a cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked computers. It connects, via a secure channel over an insecure network, a server and a client running SSH server and SSH client programs, respectively. The protocol specification distinguishes between two major versions that are referred to as SSH-1 and SSH-2.

The best-known application of the protocol is for access to shell accounts on Unix-like operating systems, but it can also be used in a similar fashion for accounts on Windows. It was designed as a replacement for Telnet and other insecure remote shell protocols such as the Berkeley rsh and rexec protocols, which send information, notably passwords, in plaintext, rendering them susceptible to interception and disclosure using packet analysis.The encryption used by SSH is intended to provide confidentiality and integrity of data over an unsecured network, such as the Internet.

You can use your Android phone, remote computer, iPAD or anything to login to a SSH server and execute command as if you’re sitting on that workstation. So let’s see how you can install a SSH server (we will be using openSSH-Server here) on Kali Linux. After this guide you will be able to do the followings:

1. Install Kali Linux remote SSH – openSSH server
2. Enable Kali Linux remote SSH service on boot
3. Change Kali default ssh keys to avoid MITM attack
4. Set MOTD – Message of the Day message with a nice ASCII
5. Troubleshoot and fix “WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED” error during SSH session.
6. Change SSH server port for extra safety

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