How to Enable and Use firewalld on CentOS 7

September 4, 2019

This phoenixNAP guide instructs how to enable and start firewalld on CentOS 7. It explains basic firewall zone concepts and teaches you how to work with default firewalld zones.

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How to Install / Enable OpenSSH on CentOS 7

August 28, 2019

This article provides all the information you need in order to set up SSH encryption on your remote device. It also covers the configuration of SSH and how to make exceptions in your firewall settings.

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How To Enable SELinux In CentOS/RHEL 7

August 27, 2019

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.

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19 Common SSH Commands in Linux With Examples

August 25, 2019

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.

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How to Generate & Set Up SSH Keys on CentOS 7

August 19, 2019

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.

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How to Enable/Disable UFW Firewall on Ubuntu 18.04 & 20.04

August 18, 2019

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.

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How to Disable or Turn Off Firewalld on CentOS 7

August 15, 2019

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

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How to Install Sophos Intercept X Advanced for Server

August 5, 2019

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.

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How to Change or Reset Administrator Password on Windows Server

July 7, 2019

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.

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May 20, 2019

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.

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