Server OS Profile: OpenBSD

OpenBSD is a derivative of the free and open source Unix operating system BSD, which was first developed at the University of California, Berkeley. The OS is probably best known for its mascot, the puffer fish named Puffy, and also for its very popular sub-project OpenSSH, which is used on many of the servers around […]

How to Connect to a Virtualbox VM Via SSH (Part 1)

In some previous posts, you learned how to setup a Virtualbox virtual machine (VM) for the purpose of creating a test server environment. Once you have a functioning test server, you are free to always work on it within the virtual machine, but if you ever want to connect to it remotely, you probably soon […]

How to Change Your SSH Port with SELinux (RHEL 6)

In a previous post, we explained how to change the SSH port on your Linux server from the standard port 22.  In most cases, this works just fine, but if you are using Red Hat Enterprise Linux 6, there is a good chance you received an error such as […]

How to Change Your Server’s SSH Port

By default the Linux SSH server (usually OpenSSH) listens for connections on port 22.  Everyone knows this, including hackers.  If you have other security measures in place, it may not matter if would-be attackers know your SSH port.  Nevertheless, having SSH on another port other than the default may add […]

What Is OpenSSH?

SSH stands for Secure Shell. OpenSSH is the open source version of SSH. But what is it used for?
Secure Shell is a protocol for securing your network connections to prevent hacking, eavesdropping, and other server attacks. It is used to encrypt data that is passed from one computer to another. It is very important when […]