Domains and DNS
Understanding SSL Certificates
SSL certificates play an important role in securing the internet. They protect sensitive information, build user trust, and even contribute positively towards your website’s…
23 October 2023 4 min read
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SSH Keys: Choosing RSA or Ed25519
SSH, or Secure Shell keys have a critical role in modern authentication and encryption when establishing secure connections. By utilising advanced mathematical functions SSH…
13 November 2023 4 min read
AlmaLinux
firewalld Basics on RHEL-Family Linux
A practical introduction to firewalld - zones, services, and ports - with the firewall-cmd commands you need to open ports safely on a new…
4 October 2024 5 min read
AlmaLinux
Initial server setup checklist on AlmaLinux
The essential first steps for a fresh, unmanaged AlmaLinux VPS - updates, a sudo user, locked-down SSH, firewalld, and automatic security updates.
15 October 2024 3 min read
AlmaLinux
SELinux basics: what it blocks and how to work with it, not around it
A practical guide to SELinux on AlmaLinux - the three modes, how to diagnose a denial properly, and why the fix is almost never…
22 October 2024 6 min read
Guides and How Tos
ufw Firewall Basics on Ubuntu
How to check, enable, and configure ufw on an Ubuntu Server VPS - including the one step that stops you locking yourself out over…
3 December 2024 3 min read
Debian
Initial server setup checklist on Debian
The first-boot checklist for a fresh Debian VPS - updates, a sudo user, SSH hardening, hostname and timezone, a firewall, and automatic security patches.
20 December 2024 4 min read
Debian
Debian’s stable/testing/unstable branches, and why servers should stick to stable
What Debian's stable, testing, and unstable (sid) branches actually mean, and why "stable" doesn't mean outdated or insecure.
27 December 2024 4 min read
Guides and How Tos
What is OpenBSD, and why is it considered one of the most secure OSes?
OpenBSD isn't Linux with a different name - it's a separate Unix-like operating system built from the ground up around one priority: security by…
21 January 2025 5 min read