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OSI and TCP/IP Models — What Every Developer & Sysadmin Should Know
Practical comparison of the 7-layer OSI model and 4-layer TCP/IP model, packet encapsulation, and bottom-up network debugging techniques.
IP Subnetting and CIDR in 10 Minutes — A Practical Guide
Complete beginner guide to IPv4 addresses, CIDR prefix notation, calculating usable hosts, subnet masks, RFC 1918 private ranges, and CLI tools.
NAT and Port Forwarding — A Beginner's Guide to Router Networking
Understand SNAT, DNAT (Port Forwarding), Hairpin NAT loopback, avoiding CGNAT traps, and safely hosting services from a home or office network.
Reverse Proxy Basics — One Front Door for All Web Services
Complete beginner guide to reverse proxies, forward vs reverse proxies, SNI routing, upstream headers (X-Forwarded-For), TLS termination, and choosing between Caddy and Nginx.
Planning Your First Homelab & Rack — Power, Noise, and Hardware Guide
Complete beginner planning guide for homelabs, hardware progression ladder, Intel N100 mini PCs, UPS sizing with NUT, noise control, and structured cabling.
Docker Compose Patterns for the Homelab — Beginner to Pro
Complete beginner guide to organizing self-hosted services with Docker Compose, yaml syntax breakdown, persistent volumes, networking, and safe updates.
Remote Access — Tailscale, WireGuard, and Mesh VPNs vs. Port Forwarding
Complete beginner guide to accessing your homelab securely from anywhere, comparing Tailscale mesh VPN, native WireGuard, CGNAT traversal, and subnet routing.
DNS Records Overview — The Definitive Beginner Guide
Complete reference to all fundamental DNS record types (A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA, PTR), zone syntax, and inspection commands.
CNAME Aliases — When and How to Use Canonical Name Records
Complete beginner guide to CNAME DNS records, resolution mechanics, why CNAME breaks the zone apex, ALIAS flattening, and the trailing dot rule.
DNSSEC Basics — Cryptographic Chain of Trust Explained
Complete beginner guide to DNSSEC, preventing DNS spoofing and cache poisoning, understanding DS, DNSKEY, and RRSIG records, and verifying with dig.
curl — Command Line HTTP Client & API Debugger
Complete beginner guide to curl, testing REST APIs, inspecting HTTP response headers, verifying SSL/TLS certificates, and debugging response timing with command flag breakdowns.