Professional domain setup with Cloudflare protection for home servers. Learn to register domains, configure DNS A records, implement UFW firewall rules, and secure SSH access while hiding your ISP IP behind Cloudflare's proxy for enterprise-grade security.
Complete step-by-step guide to securely exposing local services to the internet using Cloudflare Tunnel. Learn to install cloudflared, configure DNS routing, and set up persistent tunnels without port forwarding or firewall changes.
Comprehensive troubleshooting guide for fixing failed Cloudflare Tunnel setups. Covers common issues like missing credentials files, DNS misconfigurations, service restart loops, and application trusted domain errors. Based on real-world debugging scenarios with step-by-step solutions.
Quick and effective setup guide for protecting SSH access with Fail2ban. Configure automatic IP banning for failed authentication attempts with minimal configuration - just install, configure one jail, and activate protection in under 10 minutes.
Comprehensive crash course covering Fail2ban fundamentals, architecture, and advanced configuration. Learn how intrusion prevention works, understand jail configurations, filtering mechanisms, and action types with practical examples and real-world scenarios.
A real debugging story where a fail2ban monitoring dashboard was blocked by fail2ban itself. Follow the systematic troubleshooting process that revealed the ironic security paradox and learn network debugging techniques.
Complete troubleshooting guide for fixing Nextcloud external domain access when it only works locally. Learn to diagnose and resolve trusted domain configurations, URL overwrite settings, and SSL protocol mismatches with step-by-step solutions.
Complete guide to understanding Linux swap memory, why systems show 0B usage with abundant RAM, and optimal configuration strategies for different workloads and system specifications.
Master context windows, memory management, and performance tuning for Ollama AI models. Learn the critical difference between application limits and model parameters.
Complete guide to local AI model management with Ollama including installation, model deployment, API usage, and advanced configurations.
Complete step-by-step guide to installing and configuring Apache HTTP server on Ubuntu/Debian systems.
Comprehensive security hardening techniques for Apache web servers in production environments with advanced threat protection.
Complete guide for securing MariaDB installation with step-by-step instructions and best practices.