Karl Kubelet – Medium

Karl Kubelet

he/him

Karl Kubelet

·

Jan 27

WordPress Vulnerability Scanning … Without a Plugin

This is probably my very first “without a plugin” post. I don’t dislike plugins in general, and I do believe that dumping something in…

WordPress Vulnerability Scanning … Without a Plugin

Karl Kubelet

·

Nov 19, 2025

Dedicated vs VPS for WordPress

I ran some simple benchmarks last week to compare dedicated servers vs VPS for WordPress performance. The goal was to see what you could…

Dedicated vs VPS for WordPress

Karl Kubelet

·

Oct 15, 2025

MySQL ZFS Snapshot w/ Binlog

If you’re doing ZFS snapshots of your entire /var/lib/mysql directory, then great, you’re doing it right! That will create a consistent…

MySQL ZFS Snapshot w/ Binlog

Karl Kubelet

·

Sep 30, 2025

Why WordPress SMTP plugins suck (and what you should use instead)

Every WordPress admin has run into it: the dreaded “Emails aren’t sending” problem. You install WooCommerce, enable customer notifications…

Why WordPress SMTP plugins suck (and what you should use instead)

Karl Kubelet

·

Sep 19, 2025

You’ve been doing phpMyAdmin wrong

If you’re still uploading phpMyAdmin to your web root and calling it a day, you're setting yourself up for pain, or worse, a breach…

You’ve been doing phpMyAdmin wrong

Karl Kubelet

·

Sep 12, 2025

Secure your Nginx origin with Cloudflare (AOP + Origin Certificates)

In this lesson you’ll learn how to fully integrate Cloudflare with your Nginx server. We’ll cover how to block direct access to your…

Secure your Nginx origin with Cloudflare (AOP + Origin Certificates)

Karl Kubelet

·

Sep 11, 2025

CPU core count and frequency

Both virtual machines and bare metal servers come in different shapes and sizes. When comparing one offering to another, we’re typically…

CPU core count and frequency

Karl Kubelet

·

Sep 4, 2025

On Blocking xmlrpc.php

Just landed another customer for a performance and security audit, and they’re missing xmlrpc.php from their installation :(

On Blocking xmlrpc.php

Karl Kubelet

·

Jul 18, 2025

5 Reasons WooCommerce Is Slow (and How to Fix It)

WooCommerce has a reputation for being slow. Most performance problems come down to misconfiguration, bad hosting, and bloated plugins…

5 Reasons WooCommerce Is Slow (and How to Fix It)

Karl Kubelet

·

Jul 14, 2025

Expose Your Nginx Ingress Controller with FRP in a Private Kubernetes Cluster

Running a private Kubernetes cluster has many advantages. You gain control over your infrastructure, restrict unwanted access, and avoid…

Expose Your Nginx Ingress Controller with FRP in a Private Kubernetes Cluster

Karl Kubelet

Karl Kubelet

he/him

I break and fix WordPress servers, mostly on Kubernetes. I write about it on kubeadm.org, wpshell.com and everywhere else on the web.

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