security

How To Use RKHunter to Guard Against Rootkits on an Ubuntu VPS — step-by-step Linux tutorial on Progressive Robot

How To Use RKHunter to Guard Against Rootkits on an Ubuntu VPS

Rootkits are a serious problem for any internet-facing computers. A rootkit allows an intruder to continue to access the compromised machine even after the initial point of entry has been secured. In this article, we will cover how to check your server against known rootkits using a utility called rkhunter.

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How To Protect SSH with fail2ban on CentOS 6 — step-by-step Linux tutorial on Progressive Robot

How To Protect SSH with fail2ban on CentOS 6

fail2ban provides a way to automatically protect virtual servers from malicious behavior. This tutorial shows you how to download the required EPEL repository needed to install Fail2Ban, copy the Configuration File, configure the fail2ban defaults, and configure the ssh defaults. This tutorial describes the required steps to set up fail2ban on CentOS.

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Einrichten einer Firewall mit UFW unter Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Einrichten einer Firewall mit UFW unter Ubuntu 20.04

UFW (oder Uncomplicated Firewall) ist eine vereinfachte Firewall-Verwaltungsschnittstelle, die die Komplexität von Paketfilterungstechnologie auf niedriger Ebene wie iptables und nftables versteckt. Wenn Sie mit dem Sichern Ihres Netzwerks beginnen möchten und Sie nicht…

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How To Secure Nginx with Let's Encrypt on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Secure Nginx with Let’s Encrypt on Ubuntu 16.04

In this tutorial, we will show you how to use Let’s Encrypt to obtain a free SSL certificate and use it with Nginx on Ubuntu 16.04. We will also show you how to automatically renew your SSL certificate. If you’re running a different web server, simply follow your web server’s documentation to learn how to use the certificate with your setup.

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How To Optimize Your Tomcat Installation on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Optimize Your Tomcat Installation on Ubuntu 14.04

Tomcat is a popular implementation of the Java Servlet and JavaServer Pages technologies. It is released by the Apache Software Foundation under the popular Apache open source license. Its powerful features, favorable license, and great community makes it one of the best and most preferred Java servlets.

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How To Harden OpenSSH Client on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Harden OpenSSH Client on Ubuntu 20.04

When hardening SSH at the server side, the primary objective is to make it harder for malicious actors to access your server. However, hardening at the client side is very different, as instead you are working to defend and protect your SSH connection and client from various different threats. In this tutorial, you will harden your Ubuntu 20.04 OpenSSH client in order to help ensure that outgoing SSH connections are as secure as possible.

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How To Write Custom System Audit Rules on CentOS 7 — step-by-step Linux tutorial on Progressive Robot

How To Write Custom System Audit Rules on CentOS 7

The Linux Audit System creates an audit trail, a way to track all kinds of information on your system. It can record a lot of data like types of events, the date and time, user IDs, system calls, processes, files used, SELinux contexts, and sensitivity levels. It can track whether a file has been accessed, edited, or executed. It can even track if changes to file attributes.

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