Redmine is one of the most popular open-source project management and issue tracking platforms. It is built on the Ruby on…
VirtualBox is a free, open-source, cross-platform virtualization application maintained by Oracle. It lets you run multiple guest operating systems simultaneously on…
PostgreSQL (also called Postgres) is a free, open-source, object-relational database management system with a strong reputation for reliability, SQL standards compliance,…
VMware Workstation Player is a mature, stable virtualization platform that lets you run multiple isolated operating systems on a single physical…
A properly configured firewall is one of the most important layers of security for any internet-facing server. UFW (Uncomplicated Firewall) is a user-friendly front-end for managing iptables rules that ships pre-installed on Ubuntu. Its defaults are sensible: block all incoming connections, allow all outgoing connections. No outside traffic reaches your server unless you explicitly open a port. This guide covers how to configure a UFW firewall on Ubuntu 18.04, from setting default policies and application profiles to writing allow and deny rules for specific ports, IPs, and subnets. <strong>Prerequisite:</strong> You need sudo access. Configure UFW Firewall on Ubuntu: Defaults, SSH, and Application Profiles If UFW is not installed, add it with: bashsudo apt install ufw Check the current status: bashsudo…
UFW (Uncomplicated Firewall) is a user-friendly front-end for managing iptables rules on Ubuntu. It ships pre-installed and simplifies tasks that would…
Apache Cassandra is a free, open-source NoSQL database designed for high availability and linear scalability with no single point of failure.…
Rocket.Chat is a free, open-source team communication platform built with the Meteor framework. It is a self-hosted alternative to Slack with…
MySQL is the most popular open-source relational database management system. It is fast, reliable, and scales from small development projects to…
Apache is the most widely used web server in the world. It is free, open-source, and runs on Linux, Windows, and…