jani@raatti:~/blog $ ls -la --sort=date
[email protected] — blog — 3 articles
cat simplicity-is-a-feature-migrating-to-cloudflare-tunnel-on-red-hat-linux.md
title: Simplicity is a Feature: Migrating to Cloudflare Tunnel on Red Hat Linux
date: 2026-03-22 (4 days ago)
author: Jani Karlsson
category: Cloudflare, DevOps, Linux
---
“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” — Antoine de Saint-Exupéry Unnecessary ...
jani@raatti:~/blog $
cat from-bandwidth-mystery-to-hardened-origin-a-day-of-server-security.md
title: From Bandwidth Mystery to Hardened Origin: A Day of Server Security
date: 2026-03-20 (5 days ago)
author: Jani Karlsson
category: Cloudflare, DevOps, Linux
---
What started as a bandwidth mystery turned into a full server security audit: wp-cron self-hammering, attack traffic analysis, compiling mod_evasive from Fedora src.rpm on RHEL 10, and locking WordPress behind Cloudflare-only origin access via firewalld ipset. Plus the firewalld chain order trap that took the site down mid-session.
jani@raatti:~/blog $
cat how-to-build-a-secure-ubuntu-web-server-on-hetzner-cloud-the-right-way.md
title: How to Build a Secure Ubuntu Web Server on Hetzner Cloud (The Right Way)
date: 2026-03-19 (6 days ago)
author: Jani Karlsson
category: Cloud, Cloudflare, DevOps
---
So you’ve decided to spin up a cloud server. Brave soul. The internet is full of curious visitors — and by “curious visitors” we mean ...
jani@raatti:~/blog $