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This book explains how to design, build, and run self-hosted services on Linux that are accessible from anywhere on the Internet despite the constraints of modern residential broadband: carrier-grade NAT, missing inbound IPv4 connectivity, changing IPv6 prefixes, ISP firewalling, and double NAT. It treats networking as engineering rather than configuration: you will learn how packets move through interfaces, bridges, tunnels, firewalls, and reverse proxies; how Linux makes routing decisions; how WireGuard selects and encrypts traffic; how DNS interacts with routing and service discovery; and how to build architectures that survive real-world connectivity problems using outbound-only tunnels, VPS relays, IPv6 when stable, VPNs for secure access, and reverse proxies as ingress control planes. The book provides complete, internally consistent reference architectures with full working configurations for WireGuard, nftables, systemd-networkd, BIND and CoreDNS, nginx and Caddy, Docker, and SSH, plus systematic troubleshooting methods based on packet-path analysis rather than guesswork.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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