How to Locate Open Ports in Linux

Posted on January 20, 2021 by David Singer
Category: Tutorials | Tags: Administrator, Bash, Common Ports, Common Questions, Dynamic Ports, Encryption, Firewall, FTP, IANA, Internet Protocol, Linux, Linux Server, Linux Services, Listening, lsof, Manage, nc, Netcat, Netstat, NMAP, Permissions, Ports, Protocol, Protocols, Root, Security, Security Policy, Security Practices, Server, Server Administration, Services, SFTP, ss, SSH, SSH Keys, SSH Ports, SSH Tunnel, SSHD Conf, SSL, System Administration, TCP, Telnet, UDP, Well Known Ports, Windows, Windows 10

Reading Time: 9 minutes

What is a Port?

First, let’s define what a port is. According to the IEFT, a port is:

“A logical entity for Internet communication. Ports serve two main purposes:
1. They provide a demultiplexing identifier to separate transport sessions between the same pair of endpoints
2. They may also identify the application protocol and associated service to which processes connect.”
Wikipedia.com

In plain English, this simply means that a port is an endpoint through which data flows back and forth between two computers over a network. A computer has 65535 ports available to share information. These port numbers are based on a 16-bit number, which is where we derive the total number of available ports (0 to 65535).

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Changing The SSH Port in WHM/cPanel

Posted on December 8, 2020 by David Singer | Updated: December 11, 2020
Category: Tutorials | Tags: Account Management, Administrator, Common Questions, Encryption, Firewall, FTP, Linux, Manage, OpenSSH, OpenSSH-Server, Passphrase, Password, Password Policy, Permissions, Root, Security, Security Policy, Security Practices, selinux, Server, SFTP, SSH, SSH Keys, SSH Ports, SSH Tunnel, SSHD Conf, SSL, Windows, Windows 10, Windows Server

Reading Time: 3 minutes

While there are many ways to make sure your server is as secure as possible, there are some basic steps that we can take to increase security. Users with a Linux server can change their SSH port to something other than the default port (22). The steps listed below, outline this task providing steps to enable this change.

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How to Implement Zero Trust Security in 5 Steps

Posted on November 26, 2020 by David Singer | Updated: December 1, 2020
Category: Tutorials | Tags: Audit, Authentication, Code, Code Analysis, Code Injection, Common Questions, compliance, Compromise, Compromised Website, Content Security Policy, Data Leak, diagnostics, Encryption, fail2ban, File Permissions, Firewall, Google Authenticator, Hacking, HIPAA, Least Privilege, Linux, luks, Lynis, Malware, Passphrase, Password, Password Policy, PCI, PCI Compliant, Pen testing, Permissions, Remote Code Execution, Root, Security, Security Policy, Security Practices, selinux, Server, SSH, SSH Keys, SSH Ports, SSL, Tools, VPN, Vulnerability

Reading Time: 6 minutes

What is Zero Trust Security?

Zero Trust security is the concept, methodology, and threat model that assumes no user, system, or service operating within a secured internal environment should be automatically trusted. It put forward that every interaction must be verified when trying to connect to a system before being granted access. This concept uses micro-segmentation, and granular edge controls based on user rights, application access levels, service usage, and relation to the location to determine whether to trust a user, machine, or application seeking to access a specific part of an organization.

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How Was My Website Compromised?

Posted on November 19, 2020 by Danny Jensen | Updated: November 23, 2020
Category: Tutorials | Tags: Audit, Backups, CentOS, Code, Code Analysis, Code Injection, Common Questions, compliance, Compromise, Compromised Website, Content Security Policy, Cross-Site Scripting, Data Leak, diagnostics, Directory Transversal, Email, Encryption, fail2ban, File Permissions, Firewall, Hacking, HIPAA, Least Privilege, Linux, luks, Lynis, Malware, Passphrase, Password, Password Policy, PCI, PCI Compliant, Pen testing, Permissions, Remote Code Execution, Root, Scripts, Security, Security Policy, Security Practices, Server, SFTP, SQL Injection, SSH, SSH Keys, SSL, Tool, Ubuntu, VPN, Vulnerability

Reading Time: 7 minutes

In this tutorial, we will look at several methods that are used to compromise a website. In today’s world, websites use multiple procedures that represent the core functions of a modern business. Whether you have an eCommerce site or a business card site, a website is essential for driving business growth. We can safely state that a website is a unique image of your respective business.

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How to Install and Configure OpenSSH on Windows Server 2019

Posted on July 10, 2020 by Jeff VanDellen
Category: Tutorials | Tags: Administrator, Encryption, Firewall, OpenSSH, OpenSSH-Server, Passphrase, Password, Password Policy, Permissions, Root, Security, Security Policy, Security Practices, selinux, Server, SFTP, SSH, SSH Keys, SSH Ports, SSL, Windows, Windows 10, Windows Server

Reading Time: 6 minutes

What is OpenSSH?

OpenSSH is an open-source utility developed by The OpenBSD Project. SSH stands for “Secure SHell.” This service encrypts traffic on both ends, eliminating security risks from hackers or eavesdroppers. It can be used for remote operations like file transfers and offers key-based passwordless authentication. In this tutorial, we will demonstrate how to harness the power of SSH’s on your Windows server to send basic remote commands and transfer files using password authentication.

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How to Install Wireguard on Ubuntu 18

Posted on April 3, 2020 by David Singer | Updated: April 15, 2020
Category: Tutorials | Tags: End Point, IFConfig, IPConfig, Kernel, Kernel Module, Keypair, Netmask, Network, Network Interface, Permissions, Point-to-Point, PPA, Private Keys, Public Keys, SSH, Systemctl, Tunnel, Tunneling, Ubuntu, Ubuntu 18.04, UFW, Umask, VPN, VPN Port, Wireguard

Reading Time: 9 minutes

A Fast, Modern and Secure VPN Tunnel

Objective

In this tutorial we will learn what Wireguard is, what it is used for, how to install and configure it, and lastly, how to use it to it wisely.

What is Wireguard?

Wireguard is an open-source, dependable, advanced, VPN tunneling software you can install and use right now to create a secure, point-to-point connection to a server.

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Use SFTP To Connect To WordPress Optimized Template

Posted on March 25, 2020 by David Singer
Category: Series, Tutorials | Tags: Encryption, File Transfer, Filezilla, FTP, Login, Quick Connect, Self Signed Certificate, SFTP, SSH, SSH File Transfer Protocol, SSL, Transfer, Unknown Host Key, WordPress

Reading Time: 2 minutes

In this article, we will be reviewing how to connect to your WordPress Optimized Template using SFTP as the connection medium.

SSH File Transfer Protocol (SFTP) is the most secure way to upload files to your WordPress Optimized Template site. This article is intended specifically for connecting to a WordPress Optimized Template site using the free, cross-platform FTP client FileZilla, but the connection details should apply to any FTP client.

Note:

Please note that this article is considered legacy documentation for an older account management system. The information, however, is current.

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How to Install and Configuring NTP on CentOS and Ubuntu

Posted on March 16, 2020 by Joseph Molloy | Updated: June 11, 2020
Category: Tutorials | Tags: CentOS, CentOS 7, Chrony, Coordinated Universal Time, cPanel, Daemon, Firewall, Firewalld, Nano, Network Time Protocol, NTP, Plesk, Port, SSH, Systemctl, Systemd-Timesyncd, Time, Timedatectl, Timezone, Ubuntu, Ubuntu 18.04, UDP, UTC, Vim, Yum

Reading Time: 8 minutes

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.

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Installing WordPress using WP-CLI

Posted on March 13, 2020 by Luke Cavanagh
Category: Featured Articles, Other | Tags: Apache, CLI, cPanel, Database, Flags, GUI, Interworx, MySQL, NginX, PHP, Plesk, SSH, Terminal, VHost, WordPress, WP-CLI, Wp-Config.php

Reading Time: 3 minutes

WordPress has a great GUI-based installation process however some use cases call for CLI! Or, maybe you just feel more at home in a terminal, either way this article will show you how to get your WordPress site setup with just a terminal, using WP-CLI, and maybe a sprinkle of SSH.

In order to be able to install WordPress manually using WP-CLI you will first need to create a new database for the WordPress install. You will need to know how to find your SSH credentials as well as being used to using Terminal or Putty and WP-CLI.

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Installing Microsoft Powershell on Ubuntu 18.04

Posted on February 7, 2020 by Matt Holtz | Updated: March 25, 2020
Category: Tutorials | Tags: Apt-Get, CLI, Cmdlet, Command-line, File Manager, GitHub, Install, Linux, Microsoft, PowerShell, Remote, Script, Server, Snap, SSH, Terminal, Ubuntu Ubuntu 18, Windows

Reading Time: 5 minutes

If you are a Windows administrator who has recently been tasked with administering a Linux-based Ubuntu server, you may find that utilizing Microsoft Powershell may help ease the transition into Linux, and allow you to be more productive. If you are a Linux administrator who is interested in exploring the options that Powershell provides, then this tutorial is for you as well.

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Liquid Web | Knowledge Base

Tag: SSH

How to Locate Open Ports in Linux

What is a Port?

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