Linux Networking & Security for Beginners: Learn Interfaces, Firewalls, VPNs, and Hardening for Servers, Cloud, and Homelabs
暫譯: Linux 網路與安全入門：學習介面、防火牆、VPN 及伺服器、雲端與家庭實驗室的加固技術

Learn Interfaces, Firewalls, VPNs, and Hardening for Servers, Cloud, and Homelabs

Build a secure Linux server from zero-step by step, hands-on, and ready for 2025+.
If you've ever wondered how real admins wire up IP, DNS, routing, firewalls, SSH, VPNs, SELinux/AppArmor, IDS, and automated patching-and make it all work together-this book shows you, end to end.

You won't wade through theory. You'll configure, break, fix, harden, and verify-until your server is production-tough.

• Interfaces, IP & DNS: ip, nmcli, netplan, resolvectl, default routes that actually route.
• Traffic & services: ss, systemctl, journalctl, tcpdump, iperf3 for real diagnostics.
• Firewalls: modern nftables (plus ufw/firewalld), default-deny rules, logging, and sets.
• SSH hardening: keys-only auth, no-root login, Fail2Ban bans that stick.
• VPNs: fast WireGuard (and when to pick OpenVPN or StrongSwan/IPsec).
• Zero Trust basics: identity-aware access with practical starter tools.
• System hardening: SELinux/AppArmor in enforcing mode-labels, booleans, profiles.
• Auditing & compliance: Lynis, OpenSCAP, CIS Benchmarks-what to fix first.
• IDS/IPS: Suricata alerts that actually catch brute-force and port scans.
• Patch automation: unattended-upgrades, dnf-automatic, and live-patch options.

• Practice Labs 1-7: short, focused labs that build real muscle memory.
• Capstone Project: deploy a multi-service secure server (Web + SSH + WireGuard) with nftables, SELinux/AppArmor, Suricata, and automated updates-then attack it and verify your defenses.
• Cheat Sheets & Templates: quick-reference for ip, ss, nmcli, nftables, journalctl, plus ready-to-use WireGuard/OpenVPN/StrongSwan configs.
• Troubleshooting Guide: fix the errors everyone hits-handshakes, DNS, routes, SELinux denials, firewall drops.
• Hardening & Audit Reference: map findings to CIS and track progress with Lynis scores.

• Beginners and career-switchers who want a practical path into Linux networking & security.
• Homelab builders who want private, safe remote access.
• Cloud & on-prem admins/DevOps who need a clear, modern baseline they can trust.

• Purely practical: every concept lands in a terminal.
• Modern & up to date: nftables, WireGuard, systemd-resolved, SELinux/AppArmor, Suricata-the current toolchain.
• End-to-end coherence: networking, security, hardening, monitoring, and patching working as one system.

If you can type commands, you can build a hardened Linux server.
Open the book, run the labs, ship a secure system-today.