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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.
Proxmox VE Getting Started — Installation, Storage, VMs, and LXC
Complete beginner guide to Proxmox VE bare-metal virtualization, ZFS vs LVM storage, launching KVM virtual machines, and managing LXC containers via CLI.
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.
How Domains Work — Registry, Registrar, Registrant, and Lifecycle
A complete beginner-friendly overview of how internet domain names work, the three key roles, domain hierarchy, the full lifecycle, and nameserver delegation.
Choosing a TLD — .de vs .eu vs .com vs New gTLDs
Complete beginner guide to selecting the right Top-Level Domain, pricing traps, renewal math, HSTS preloading, trust signals, and SEO implications.
Register and Manage Domains with ternisdomains.de
Practical beginner guide to domain registration, nameserver delegation, DNS record management, and security settings on ternisdomains.de.
WHOIS, RDAP, and Domain Privacy — Reading Registration Data
Complete beginner guide to legacy WHOIS vs modern RDAP (RESTful JSON), querying via curl and jq, GDPR redaction rules, and WHOIS privacy.
Nameserver Delegation and Glue Records — Resolving the Chicken-and-Egg Problem
Complete beginner guide to DNS zone delegation, in-bailiwick nameservers, glue records, avoiding lame delegations, and CLI verification tools.
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.
DNS A and AAAA Records — Pointing Domains at IP Addresses
Complete beginner guide to IPv4 A records and IPv6 AAAA records, dual-stack configurations, TTL tuning strategies, and CLI verification with dig.
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.
MX Records and Email Deliverability — The SPF, DKIM, and DMARC Trinity
Complete beginner guide to routing incoming email with MX records and achieving 100% inbox delivery using SPF, DKIM, and DMARC authentication.
TXT Records — SPF, DKIM, and DMARC Syntax Masterclass
Complete beginner guide to writing, parsing, and debugging SPF, DKIM, and DMARC TXT records, understanding qualifiers, tags, and avoiding the 10-lookup limit.
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.
Self-Hosting Authoritative DNS with example-dns
Complete beginner guide to running authoritative nameservers, Primary-Secondary replication, AXFR zone transfers, TSIG security, and the example-dns architecture.
SQL in 10 Minutes — Your First Queries and Core Mental Model
Complete beginner guide to SQL querying, clause execution order, SELECT, WHERE, ORDER BY, LIMIT, NULL logic, grouping, and transaction safety.