How to setup HAProxy as Load Balancer for Nginx on CentOS 7

HAProxy or High Availability Proxy is an open source TCP and HTTP load balancer and proxy server software. HAProxy has been written by Willy Tarreau in C, it supports SSL, compressions, keep-alive, custom log formats and header rewriting. HAProxy is a fast and lightweight proxy server and load balancer with a small memory footprint and low CPU usage. It is used by large sites like Github, StackOverflow, Reddit, Tumblr, Twitter and others. It has become the most popular software load balancer and proxy server in the past years.

In this tutorial, I will guide you trough the HAProxy installation and configuration for 3 servers, one load balancer, and two Nginx web servers. We will install HAProxy on a single server and then install Nginx web server on the other servers. HAProxy acts as a load balancer for the Nginx web servers.

How to Configure ModSecurity and mod_evasive for Apache on CentOS 7

Introduction

ModSecurity and mod_evasive are free Apache modules which protect your web server from various brute force or (D)DoS attacks, including SQL injection, cross-site scripting, session hijacking, and many others. These modules can be deployed and integrated into your infrastructure without having to modify your internal network.

In this tutorial I will explain how to install, configure and integrate ModSecurity and mod_evasive with Apache on CentOS 7.

How Do enable the MySQL audit using MariaDB Audit Plugin

We are using Oracle MySQL community 5.7 version which does not have capability of auditing user activities. There will be some option to audit the MySQL statements by enabling General log ( for whole sql activity) and Slow log ( to identify the culprit sql which slow down the system.

Neither of above does not help top give you a complete solution if somebody change the table values with or without a proper approval like accidental data deletion or query execution against a wrong window.

How to Install Different PHP (5.6, 7.0 and 7.1) Versions in Ubuntu

PHP (recursive acronym for PHP: Hypertext Preprocessor) is an open source, popular general-purpose scripting language that is widely-used and best suited for developing websites and web-based applications. It is a server-side scripting language that can be embedded in HTML.

Currently, there are three supported versions of PHP, i.e PHP 5.6, 7.0 and 7.1. Meaning PHP 5.3, 5.4 and 5.5have all reached end of life; they are no longer supported with security updates.

How to install Apache, PHP 7.1 and MySQL on CentOS 7.3 (LAMP)

This tutorial shows how you can install an Apache webserver on a CentOS 7 server with PHP support (mod_php) and MySQL support. LAMP is short for Linux, Apache, MySQL, PHP.

This updated tutorial shows the installation of the latest PHP versions (7.0 and 7.1) on CentOS 7.3.

1 Preliminary Note

In this tutorial, I use the hostname server1.example.com with the IP p 192.168.1.100. These settings might differ for you, so you have to replace them where appropriate.

Hadoop VS MPP

Over the latest time I’ve heard many discussions on this topic. Also this is a very popular question asked by the customers with not much experience in the field of “big data”. In fact, I dislike this buzzword for ambiguity, but this is what the customers are usually coming to us with, so I got to use it.

How To Secure Nginx with Let's Encrypt on CentOS 7

Introduction

Let's Encrypt is a new Certificate Authority (CA) that provides an easy way to obtain and install free TLS/SSL certificates, thereby enabling encrypted HTTPS on web servers. It simplifies the process by providing a software client, Certbot, that attempts to automate most (if not all) of the required steps. Currently, the entire process of obtaining and installing a certificate is fully automated on both Apache and Nginx web servers.

In this tutorial, we will show you how to use the certbot Let's Encrypt client to obtain a free SSL certificate and use it with Nginx on CentOS 7. We will also show you how to automatically renew your SSL certificate.