Port Knocking is a nifty technique of controlling access to a port by only allowing legitimate users access to the service running on a server. It works in such a way that when the right sequence of connection attempts is made, the firewall gladly opens the port that was closed. The logic behind port knocking
SSH - DesignLinux
How to Install Mosh Shell as SSH Alternative on Linux
Mosh, which stands for Mobile Shell is a command-line application which is used for connecting to the server from a client computer, over the Internet. It can be used as SSH and contains more feature than Secure Shell. It is an application similar to SSH, but with additional features. The application is written originally by
How to Use Two-Factor Authentication with Ubuntu
Over time, the traditional username and password authentication has proven inadequate in providing robust security to applications and systems. Usernames and passwords can easily be cracked using a plethora of hacking tools, leaving your system vulnerable to breaches. For this reason, any company or entity that takes security seriously needs to implement 2-Factor authentication. Colloquially
Setup Passwordless SSH Login for Multiple Remote Servers Using Script
SSH Key-based authentication (also known as public-key authentication) allows for password-less authentication and it is a more secure and a much better solution than password authentication. One major advantage of SSH password-less login, let alone security is that it allows for automation of various kinds of cross-server processes. Related Read: How to Secure and Harden