security Archives - Page 10 of 10

How I Detect and Prevent Brute-Force Attacks (A 6-Month Review)

March 10, 2026

A midnight brute-force attack forced me to get serious about server security. For the last six months, a layered strategy using Fail2ban and SSH keys has kept my systems secure and silent. This guide details my practical, battle-tested setup so you can do the same.

Security

Self-Hosted Password Management: A Guide to Vaultwarden

March 10, 2026

Tired of trusting your passwords to cloud services? This guide shows you how to take back control by setting up a secure, self-hosted password manager with Vaultwarden and Docker. Follow these practical steps for installation, configuration, and essential maintenance.

Networking

A Practical Guide to Configuring a Linux Firewall: iptables vs. nftables

March 9, 2026

Secure your new Linux server by setting up a firewall. This guide explains why a firewall is essential, compares the classic iptables with the modern nftables, and provides a production-ready nftables configuration to get you started.

Networking

How to Set Up OpenVPN Server on Ubuntu: A Practical Guide

March 8, 2026

Setting up OpenVPN on Ubuntu means building a PKI, configuring server certificates, and generating per-client .ovpn files. This guide covers each step with real commands and the practical details that documentation usually leaves out.

Networking

SSH Tunneling: Secure Access to Remote Services Over Any Network

March 7, 2026

SSH tunneling lets you securely forward ports between machines using an existing SSH connection — no VPN, no firewall changes, no extra software. This guide covers local, remote, and dynamic tunnels with practical examples, persistent setup using autossh, and a systemd service for production use.

AI Safety: How to Use AI Tools Without Leaking Your Data

March 6, 2026

Using AI tools like ChatGPT or Claude without thinking about data privacy is a common but avoidable risk. This guide walks through practical techniques — anonymization scripts, API access, and local models with Ollama — to keep your sensitive data off third-party servers.