VPN

Safe internet use is no longer optional today; it is a necessity.

Whether working from home, using public Wi-Fi, supporting an association, or running a small business, anyone transmitting data over unsecured networks exposes themselves to real risks.

This book provides a practical, accessible, and technically sound introduction to VPN technologies without marketing jargon and without dangerous oversimplifications.

It explains not only how VPNs work, but above all why, when, and where they should be used, as well as where their limitations lie.

What you will find in this book
An accessible introduction to VPN fundamentals, even without prior knowledge
Technical deep dives into OpenVPN, WireGuard, and other technologies
Secure configurations for private users, small and medium-sized businesses, and associations
Realistic threat scenarios drawn from practical experience
Common mistakes, misconceptions, and dangerous myths
Security and data protection considerations in the European context
A clear distinction between marketing promises and technical reality
Field-tested recommendations instead of purely theoretical ideal scenarios

Who is this book for?
Private users who want to protect themselves on public Wi-Fi networks
Freelancers, small and medium-sized businesses, and associations without their own IT department
Administrators and technically interested readers
People who want to understand what security really means
Readers who want to take responsibility for their own data
What this book deliberately is not
A superficial VPN guide
An advertising brochure for VPN providers
A simple click-here-and-you-are-done manual
Fearmongering

Instead:
Honest technology. Clearly explained. Applied in practice.