How to Setup OpenVPN

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What is OpenVPN?

The OpenVPN software bundle is a set of open-source, virtual private network (VPN) applications used to create a direct, secure site-to-site connection that provides remote access between two locations. 

The OpenVPN Server consists of three main parts:

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How Do I Use GPG?

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What is GPG?

GnuPG (or Gnu Privacy Guard) is an adaptation of an earlier encryption standard known as PGP (or Pretty Good Privacy). GPG uses the method of “public” and “private” keys for the encryption and signing of messages or data.

In this article, we’re going to be discussing the following topics: 

  • Why is GPG needed?
  • How Does Public Key Encryption Work?
  • How do I Setup GPG Keys?
  • How do I Find Other Users’ Public Keys?
  • How do I Make My Public Key Available To Others?
  • How do I Encrypt and Decrypt Messages with GPG?
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DStat Is Now PCP – Performance Co-Pilot

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Performance Co-Pilot (PCP) is a compact assessment and evaluation tool that is used to collect a wide array of server metrics and examines current and prior operational data. It is designed to be easily customizable utilizing modern APIs and other resources used to extend its functionality. Redhat has taken many of the best features of DStat and coupled them with additional capabilities that extended its usefulness, and have created their own updated version called Performance Co-Pilot.

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Install Fail2Ban On CentOS 7

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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.

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How to Install PhantomJS On CentOS 7

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What is PhantomJS?

In this article, we will be discussing PhantomJS. PhantomJS is, in the simplest of terms, is a headless browser (headless, meaning without a GUI) that utilizes a javascript API. This function makes the browser very useful when used for:

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Top 15 Server Security Practices for 2020

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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.

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How To Create A Software Install List

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Purpose

The purpose of this article is to describe and explore ways to copy or backup your currently existing installed software titles into a single file for later use. We can then use this file to reinstall the software onto another system or clone the existing software across multiple Linux systems on or across a network. This method also prevents the need to install software titles one by one.

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Update: WHMCS CURL Bug

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WHMCS has discovered a problem in an earlier EA4 Curl Package introduced on CentOS servers.

Update!

UPDATE: This is reportedly fixed in ea-libcurl-7.67.0-2.2.1, so it should no longer be necessary to downgrade. (https://github.com/CpanelInc/libcurl/commit/7ca2bbb724ac54a3c41950c8736076953bf1429b)

Working versions:
* ea-libcurl-7.66.0-1.1.2.cpanel.x86_64
* ea-libcurl-7.67.0-2.2.1.cpanel.x86_64

Buggy version:
*ea-libcurl-7.67.0-1.1.2.cpanel.x86_64

Per https://forums.cpanel.net/threads/cpanel-curl-update-breaks-whmcs-enom-module.663449/ it may be necessary to restart PHP-FPM to apply the changes to the running PHP binaries.

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How to Simplify Working With Kernels

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What Is A Kernel?

The kernel is a piece of software that is at the core of an operating system. It usually has complete control over all of the server systems. It is normally the first program loaded after the bootloader has completed its tasks. The kernel then handles the rest of the start-up tasks as well as i/o requests from the system’s software. It then translates those requests into hardware instructions for the CPU (central processing unit).

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How to Install Microsoft SQL on Linux

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In this article, we will be discussing how to install Microsoft SQL or MSSQL on Linux. Microsoft SQL, colloquially referred to as MSSQL, is a relational database management system created by Microsoft. Open-source MySQL and PostgreSQL are typically synonymous with Linux distributions, but working with MSSQL on Linux is also supported. MSSQL offers some features that its open-source counterparts don’t, and depending on application requirements, it might be the right choice for an RDBMS. In this tutorial, we are going to walk through how to install MSSQL on CentOS 7 and Ubuntu 16.04.

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