Security

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.

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.

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.