How to secure ubuntu 25.04 with firewalld zones and rules
Lock down Ubuntu 25.04 with FirewallD’s zone-based policy. Replace UFW, enable persistent rules, and manage services and ports safely without locking yourself out. The steps below cover installation, zones, runtime vs permanent changes, rich rules, NAT and port forwarding, IPv6, logging, backups, and verification on a production-ready server. Prepare the system and check UFW Ensure […]
how to configure firewalld on redhat rhel
FirewallD in Red Hat/RHEL is a key layer for securing networks and services. With zone-based rules, you can precisely manage access, open or block ports, and enable NAT or logging. The following steps provide a practical explanation of configuring FirewallD in a professional way. Verify and start FirewallD Confirm the package is installed, enable the […]
How to configure nginx reverse proxy on centos stream 9
Configure an Nginx reverse proxy on CentOS safely and predictably. A reverse proxy centralizes TLS, shields upstream apps, and enables caching and rate limiting. Step 1: Verify OS and update packages Confirm the platform and ensure the system is current to avoid dependency issues. cat /etc/os-release sudo dnf -y update sudo reboot Step 2: Install […]
how to install v2ray websocket tls on debian 12
Deploying V2Ray with WebSocket over TLS on Debian 12.11 improves privacy, reliability, and CDN compatibility. The stack uses Nginx for TLS termination and V2Ray for VMess over WebSocket. A valid domain and DNS A record are required. Commands assume root or sudo privileges and ports 80/443 open on the server firewall. Step 1 — Prerequisites […]
how to install postgresql on ubuntu 25.10
In this step-by-step guide, you’ll learn how to install PostgreSQL on Ubuntu 25.10. We’ll install the latest version from either the official Ubuntu repository or the PGDG repository, start and secure the service, configure remote access and the firewall, create users and databases, handle backups, and perform major version upgrades. Ideal for admins and DevOps […]
how to install and configure openvpn on rhel 9/8
OpenVPN on Red Hat Enterprise Linux 9/8 delivers secure, flexible remote access. The process below covers packages, PKI, server configuration, firewall, and client profiles using Easy-RSA 3. Commands are safe to copy, tuned for SELinux, and optimized for UDP performance and modern ciphers. Step 1: Verify OS, network, and update Confirm the platform, refresh repositories, […]
How to Install OpenVPN on Linux Mint
OpenVPN is a widely-used VPN solution providing secure network connections. Installing OpenVPN on Linux Mint involves setting up the client or server components through the terminal, ensuring encrypted communication for your system. Update System Packages Updating package lists and installed packages keeps your system stable and ensures access to the latest OpenVPN version. sudo apt […]
How to install mongodb on centos 8
MongoDB is a popular NoSQL database suited for handling large volumes of data. Installing MongoDB on CentOS 8 requires configuring repositories and system settings properly. Follow the steps below to get MongoDB up and running smoothly. Step 1: Disable CentOS 8 AppStream Module MongoDB packages conflict with CentOS 8’s default AppStream modules. Disabling the default […]
how to install mongodb on ubuntu 25.04
MongoDB 7.0 runs smoothly on Ubuntu 25.04 once the repository is added, the packages are installed, and the service is enabled. This setup provides a reliable foundation for database operations. Step 1: Import MongoDB Public GPG Key Importing the MongoDB GPG key ensures that the MongoDB packages are trusted and verify their integrity during installation. […]
how to install mongodb on debian 12.11
MongoDB 6.0 can be installed on Debian 12.11 by preparing the system, adding the official repository, and configuring the service to run automatically. These steps ensure a stable and secure database environment. Step 1: Update System Packages Synchronize your package lists to ensure the latest versions of software are available for installation. sudo apt update […]
