Tag: Firewall

Introduction

In this article we will learn what the Network Time protocol (NTP) is and how to install it on the two Linux distributions most commonly used on Liquid Web’s servers. We will be focusing on using CentOS 7 and Ubuntu 18.04 servers, but the process is largely the same on other recent versions of each. Before we start, make sure we are familiar with using SSH (Secure Shell) as we’ll need it to connect to the server. Here’s a link to one of our articles on the basics of SSH if you are unfamiliar with its usage.

Issue

Have you seen this error when restarting csf?

(On Managed Servers)

In this article, we will provide an in depth explanation on how to set up and customize the messenger feature in CSF on a managed server.

Introduction

What happens when a site is compromised? How quickly can you respond when you recognize the signs that something is amiss? In today’s article, we will explore some of the more common indicators of a compromised website, how you can spot it, and how to act on it in a timely manner. 

(On Unmanaged/Core Managed Servers)

What Is CSF?

In this article, we will provide an in-depth explanation of how to set up and customize the messenger feature in CSF on an unmanaged or core managed server.  Let's begin by defining exactly what CSF or ConfigServer Firewall is and what it does.

What Is Fail2Ban?

Fail2ban is an open-source software that actively scans the servers log files in real-time for any brute force login attempts, and if found, summarily blocks the attack using the servers firewall software (firewalld or iptables). Fail2Ban runs as a background process and continuously scans the log files for unusual login patterns and security breach attempts.

In this article, we will denote the security best practices for 2020 and beyond. Because security is such a challenging subject for many, it often goes unheeded, and as such, many are caught unaware when an issue arises. By following these best practices, you can significantly lower your risk of being compromised by a malicious actor.

In this article, we will learn how to switch a Linux firewall from IPtables to nftables on Ubuntu. IPtables, which is based on the Linux kernel Netfilter module, is currently the default firewall for many Linux distributions. It protects against multiple threat vectors and allows your server to block unwanted traffic based on a specific ruleset.

What is Firewalld?

Firewalld is a dynamically-managed, Linux-based firewall management tool that supports network/firewall zones. These zones define the level of trust for network connections or interfaces.

What is Puppet?

In this tutorial, we will install Puppet on a Ubuntu 18.04 server. Puppet is an open core, server based, task management type of automation software that is primarily used to limit your interactions for many of the mundane, day to day server tasks that used to require personal intervention.