The Best New Firewall Books To Read In 2025

My new book Proxmox Firewall Understand Activate Isolate offers a comprehensive introduction to Proxmox VE 8’s firewall topic, aimed at everyone who wants to protect their Proxmox environment from unauthorized access and threats. Configuring the firewall in Proxmox requires not only knowledge of network security but also an understanding of the specific levels on which the firewall operates: Datacenter, Node, and VM-CT firewalls. In this book, I explain these different levels and show you how to create a secure environment with targeted rules. We start with the Datacenter firewall, which represents the top layer.

Next is the Node firewall, where security is broken down to individual hosts. The VM and CT firewalls are the finest layer of security, allowing you to secure each individual virtual machine or container. Of course, this book cannot cover all possible use cases and deeper technical concepts in full detail (as always), because network security and firewalls are complex, evolving fields. However, with this book, you’ll learn the basic principles of the Proxmox firewall and how to effectively use it to make your environment more secure. It is meant to serve as a tool to help you understand Proxmox better and customize the firewall to your specific needs. The concepts in this book are your first steps toward a truly secure virtualization environment—a foundation that will allow you to continue developing your IT security knowledge over time. This book not only includes the basic setup steps and application rules for the Proxmox firewall but also covers essential ports and practical configuration examples. It addresses the key questions every Proxmox user should know to make their system more secure. And this is absolutely necessary—every day I see Proxmox servers where the firewall is either not configured at all or insufficiently so. This is exactly why I wrote this book, to emphasize the importance of solid firewall protection and to provide every user with the necessary tools. With Proxmox Firewall Understand Activate Isolate, you get not only a book but a guide to expand your knowledge and create a secure Proxmox environment. As with all my IT books, I’ve also ensured that the print edition is easy to read—the font sizes are designed for comfortable reading. Of course, the familiar pages for notes are also included. After all, we all know it: you read, reflect, and want to jot down an idea or note without scribbling all over the pages. The note pages are a practical extra that I value as a useful addition—and perhaps you will too!

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"Deep Dive into Linux Networking: Configuring Firewalls, VPNs, and Secure Connections" is an essential guide for system administrators, network engineers, IT security professionals, and anyone looking to master Linux networking. This comprehensive book takes you on a journey from the fundamentals of Linux networking to advanced configurations of firewalls and Virtual Private Networks (VPNs). In today's interconnected world, understanding how to set up, manage, and secure networks is crucial. Linux, with its powerful and flexible networking capabilities, has become a go-to platform for network infrastructure.

This book demystifies the complexities of Linux networking and provides you with practical, hands-on knowledge applicable to real-world scenarios. Starting with the basics, you'll learn about:. - Essential networking commands and configurations. - TCP/IP stack, IP addressing, and routing. - Network interface management. As you progress, you'll dive deep into:. - Implementing and managing firewalls using iptables and nftables. - Setting up and configuring VPNs with OpenVPN and WireGuard. - Securing network services and enforcing security policies. - Advanced topics such as load balancing, failover, and SSH tunneling. Key Features:. 1. Comprehensive coverage of Linux networking fundamentals. 2. Step-by-step guides for configuring firewalls and VPNs. 3. Practical examples and real-world use cases. 4. Troubleshooting techniques for common network issues. 5. Best practices for network security and management. This book adopts a hands-on approach, encouraging you to try out commands and configurations as you read. Each concept is explained with clear, concise instructions and accompanied by detailed examples. Whether you're setting up a home server, managing a corporate network, or securing cloud-based infrastructure, you'll find valuable insights and techniques to enhance your Linux networking skills. By the end of this book, you'll be equipped with:. - A solid understanding of Linux networking principles. - Proficiency in configuring and managing firewalls. - Skills to set up secure VPN connections. - Ability to troubleshoot complex network issues. - Knowledge to implement advanced networking solutions. The author brings years of experience in creating secure and reliable network configurations for diverse environments. This expertise is distilled into a guide that caters to both beginners and experienced professionals looking to refine their knowledge. Chapters include:. 1. Introduction to Linux Networking. 2. Linux Networking Fundamentals. 3. Firewalls with iptables. 4. Advanced Firewall Configurations with nftables. 5. Virtual Private Networks (VPNs) Overview. 6. Configuring OpenVPN. 7. Implementing WireGuard VPN. 8. Securing Network Services. 9. Load Balancing and Failover. 10. SSH Tunneling and Port Forwarding. 11. Troubleshooting Network Issues. 12. Real-World Networking Scenarios. The book also includes appendices that serve as quick references for:. - Common networking commands. - Network protocols. - Configuration file locations and formats. "Deep Dive into Linux Networking" is more than just a book; it's a comprehensive resource that will empower you to build, manage, and secure Linux-based networks with confidence. Whether you're looking to advance your career in IT, enhance your home network setup, or simply expand your knowledge of Linux networking, this book provides the tools and knowledge you need. Don't let the complexities of Linux networking hold you back. With this guide, you'll navigate the intricacies of network configuration, security, and management with ease. Start your journey to becoming a Linux networking expert today! Perfect for:. - System Administrators. Grab your copy now and take the first step towards mastering Linux networking, firewalls, and VPNs!