Networking

The Nmap hosted security tool can help you determine how well your firewall and security configuration is working. This guide will show you how to scan or check your Linux system for open ports using Nmap.

The Linux ping command is a powerful tool for troubleshooting and testing network connectivity. In this guide, we will walk you through some of the most useful ping commands with examples.

NGINX (pronounced "Engine X") is a web server application used to set up a reverse proxy. This guide provides an in-depth look into setting up a reverse proxy via NGINX.

The easiest way to set up a reverse proxy is using Docker and Nginx. Learn how to set up reverse proxy for web servers by running each service in a Docker container.

Nginx is a Linux-based web server and proxy that specializes in redirecting web traffic. It can be configured to redirect unencrypted HTTP web traffic to an encrypted HTTPS server. This guide will show you how to redirect HTTP to HTTPS using Nginx.

Puppet is an open-source solution that helps you perform administrative tasks remotely.
This tutorial takes you step-by-step through the process of installing Puppet on Ubuntu 20.04.

This article deals with the most common causes of the "ssh_exchange_identification: read: Connection reset by peer" error. At the same time, we offer expert solutions for this error, such as managing Host-Based Access Control Lists, changing Intrusion prevention software settings, and editing the SSH daemon configuration file.

This article explains how to find and access the Windows hosts file and add custom IP to domain name mappings.

SysAdmins frequently edit the hosts file to create application testing environments and control which websites can be accessed from the system. Read this tutorial to learn how to edit the hosts file on Linux.

Fix SSH connection refused by troubleshooting some of the common causes for this problem. Take a look of all the reasons for connection refused error and how to fix the problem.