Security

The article deals with the benefits of SELinux and the various options it provides. These settings can affect server security, and making sure you have all the relevant information is crucial.

Secure Shell is an important protocol for anyone managing and controlling remote machines. This guide covers the most useful commands such as specifying a username for your connection, using a different port number, generating SSH key pairs, and much more.

Learn how to set up SSH key authentication on CentOS to safely communicate with remote servers. Create the key pair, copy the public key, connect to the remote server, and disable password authentication.

Ubuntu comes pre-installed with a firewall configuration tool, UFW (Uncomplicated Firewall). This tutorial shows you how to disable and enable an Ubuntu UFW firewall using the command line.

Firewalld is a dynamically managed firewall solution that supports network zoning. As of CentOS 7, firewalld (Dynamic Firewall Manager) is the default firewall tool on CentOS servers. Admins might need to disable firewalld for testing or switching to another firewall tool. This tutorial shows you how to disable and stop the firewall on CentOS 7

If you are using the Sophos Central Admin platform to manage and secure your devices, you will want to activate Server Protection. Deploy Sophos agents on Linux and Windows servers quickly and easily, with the step-by-step help of this installation guide.

There may come a time when you need to change the admin password on your Windows Server. How to change your administrator password largely depends on whether you remember the old password or not. If you are routinely changing a known administrator password, you can use the user interface. However, if you're changing an unknown administrator password, you may need to use the command line interface.

Are you running into the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error? This error happens in a user’s browser when they try to access a website. It means that there’s a difference between the security information that was provided and the actual configuration of the website. This guide provides solutions.

Nmap stands for Network Mapper. It is an open source tool for network exploration and security auditing. With NMAP, server administrators can easily reveal hosts and services on a computer, scan for security issues and check for open ports. The NMAP command line tool can audit and discover local and remote open ports, as well as network information and hosts. Here are some of the most useful Nmap commands with examples.

There are many different tools for monitoring network traffic on a Linux server. Each option has its strengths and weaknesses. Most of the command-line utilities are designed to be lightweight, so they do not inflate bandwidth reports. Some are designed to present a basic overview, while others provide detailed data. This guide offers the best Linux network monitoring tools.