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Beginner
Web Servers

Apache Web Server Installation

Step-by-step Apache 2.4 install on Ubuntu, with sites-enabled, mod-php, and the basic vhost layout you actually want in production.

Apache Ubuntu Installation
Intermediate
Cloudflare

Cloudflare Tunnel Setup

Expose home-lab services through Cloudflare without opening a single port. Covers cloudflared install, named tunnels, and ingress routing.

Cloudflare Tunnel cloudflared
Advanced
Cloudflare

Cloudflare Tunnel Troubleshooting

When cloudflared is up but the site is down: connector logs, ingress mismatches, hostname-to-service routing, and the failure modes you will hit.

Cloudflare Debugging Troubleshooting
Intermediate
Hosting

Custom Domain Home Hosting

Point a real domain at a home server end-to-end — registrar DNS, Cloudflare proxying, and the Apache vhost on the receiving end.

DNS Domain Self-Hosted
Beginner
Security

Fail2ban 101 Crash Course

What Fail2ban does, why every public-facing server should run it, and the mental model behind jails, filters, and actions.

Fail2ban Security SSH
Intermediate
Security

Fail2ban SSH Protection Setup

Install Fail2ban, harden the SSH jail, tune ban times, and verify the iptables rules actually fire when an attacker does.

Fail2ban SSH Hardening
Advanced
Security

The Fail2ban Debugging Adventure

A real war story: rule that should ban does not, log lines that should match do not, and the trail of fail2ban-regex commands that found it.

Fail2ban Debugging Logs
Advanced
Nextcloud

Nextcloud External Domain Troubleshooting

Trusted domains, overwrite host, reverse proxy headers — the four config tweaks that determine whether Nextcloud works from the outside.

Nextcloud DNS Reverse Proxy
Advanced
Nextcloud

Nextcloud Office + Collabora Fix

Why Collabora refuses to load documents inside Nextcloud and the WOPI/SSL/CORS combination that makes it actually render.

Nextcloud Collabora Office
Intermediate
SSL / TLS

SAN Certificates on Ubuntu

Generate multi-domain SSL certs with Subject Alternative Names using OpenSSL. The config file pattern that actually validates.

SSL OpenSSL Certificates