Category Archives: Server

Protect your SSH port with FirewallD and Knockd on CentOS 7 Linux

This article will explain how to hide your SSH daemon from port scanners and attackers on CeonOS 7 Linux by using FirewallD with KnockD (port knocking daemon).   What does knockd? Port knocking server is a daemon running on the server and waiting for a specific port knocking sequence. Such a sequence usually consists of… Read More »

How to get a free SSL certificate for your website

Save money by installing a free SSL certificate on your domain. Since October 2017, Google has decided that an SSL certificate is required for each website. As of January 2018, Google will penalize websites that do not have a valid SSL certificate installed. The first sanction will be a huge red warning page within Google’s… Read More »

How to Install COMODO SSL Certificate for Webmin / Virtualmin

Learn how to properly install COMODO SSL Certificate for website managed via Webmin or Virtualmin control panel. This Setup instruction works on Webmin and Virtualmin but also on any other web hosting control panel requiring a SSL Certificate Chain. This Guide will help you to add an SSL (Secure Socket Layer) Certificate for a website… Read More »

Install PHP suhosin Security Patch on Linux CentOS 6.x – For Dummies

Simple steps to perform an installation of suhosin PHP security patch on Linux CentOS 6.x. 32Bit and 64Bit.       Login your Server SSH as “Root”.   Note: Before starting the installation process, make sure “php-devel” is installed.   Otherwise, run command:   yum install php-devel -y       Give these commands:  … Read More »