Tutorials.

2026·07·11 Defence Installing NextCloud Securely on Ubuntu with Apache A hardened NextCloud deployment on Ubuntu 24.04 with Apache, PHP 8.3, MySQL, Redis and Let's Encrypt. 18 min 2026·06·17 Opinion Teaching Children About Online Safety — A Practical Guide for Parents Age-appropriate rules for internet access, how to talk to children about online risks, managing social media, and what to do when something goes wrong. 16 min 2026·06·10 Opinion Parental Controls on Windows, macOS, ChromeOS and Linux Configure built-in parental controls on every major operating system — screen time limits, content filtering, app restrictions, activity reports — plus browser, gaming platform and mobile device controls. 26 min 2026·06·03 Opinion Securing Your Home Network to Protect Your Family Harden your router, deploy DNS-level content filtering, segment your network for children's devices and IoT, and schedule internet access — a practical guide for parents. 20 min 2026·05·15 Opinion Deploying Wazuh for Home and Small Business — All-in-One Server with Linux, Windows and macOS Agents Build a complete SIEM and endpoint detection platform with the Wazuh all-in-one server on Ubuntu 24.04 LTS or Docker on Windows, then deploy agents across Linux, Windows and macOS. 30 min 2026·05·12 Defence Configure Fail2Ban: Protecting Linux Services from Brute Force Install and configure Fail2Ban on Ubuntu to protect SSH, Apache and other services with rate-limiting and IP banning. 10 min 2026·03·10 Privacy How to Use Tor: A Practical Guide to Anonymous Browsing Install, configure and use the Tor Browser on Linux and Windows with bridges, security levels and operational discipline. 12 min 2026·02·10 Privacy How to Use I2P: A Practical Guide to the Invisible Internet Install and configure the I2P router on Ubuntu, access eepsites, and understand how I2P differs from Tor. 11 min 2026·01·21 Defence Configure psad: Detecting Port Scans on Linux Install and configure psad on Ubuntu to detect and optionally block network port scans using iptables log analysis. 9 min 2026·01·19 Defence Installing and Configuring Postfix with ClamAV and SpamAssassin Build a hardened mail server on Ubuntu with Postfix for delivery, ClamAV for virus scanning and SpamAssassin for spam filtering, integrated through Amavis. 22 min 2025·11·10 Privacy How to Use GPG to Secure Your Email Generate a GPG key pair, publish your public key, encrypt and sign email on the command line and in Thunderbird. 14 min 2025·03·18 Opinion Installing GoPhish on Ubuntu 24.04 LTS and Configuring DNS for Phishing Simulation Deploy GoPhish with Postfix on Ubuntu, configure SPF, DKIM, DMARC, CAA and SRV records for your sending domains, and import campaign templates. 24 min