Port knocking hides SSH and other services from attackers. This guide explains knockd, OpenSPA and fwknopd and shows a complete fwknopd setup (server + client for Windows/Linux/macOS).

A concise 2025 follow-up: how to run Pi-hole reliably today — Docker Compose example, Unbound resolver, DNS-over-HTTPS options, systemd-resolved tips, and troubleshooting checklist.

Add a Jekyll post-render hook that marks external links with target="_blank" and rel="noopener noreferrer" without breaking images, TOC or mailto links.

Learn how to programmatically read BRF+ decision table data using the FDT API in ABAP. This comprehensive guide covers querying applications, accessing decision tables, and extracting table data into custom structures.

Discover my refined Darcula Colorful IntelliJ theme with enhanced syntax highlighting for Java. Boost readability, reduce eye strain, and download the .icls.

Complete guide to resolving DNS resolution failures after upgrading to OPNsense 25.7, including step-by-step migration from Unbound to dnsmasq for improved stability and local hostname resolution in home networks.

Automate tinyMediaManager via its HTTP API: enable the API, auth with api-key, send JSON commands, understand scope=new, and run curl/bash examples.

Learn how to extract SAP BRF+ decision table data into ABAP internal tables for high-performance access. This guide covers API usage, buffering strategies, HANA integration, and best practices for optimizing SAP business rule evaluations and system integration.

Learn how to embed SAP WebGUI in external web applications by bypassing clickjacking protection. This guide covers cross-domain integration, secure postMessage handling, SAP backend configuration, and best practices for seamless SAP UI embedding.

Comprehensive guide to deploying Jenkins on Proxmox in a home lab, featuring multi-agent setup with Linux and macOS, Docker integration, secure SSH configuration, and best practices for scalable, cross-platform CI/CD automation.