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Basics

What is DNS (Domain Name System) and what does a DNS server do?

Who remembers phone books made of paper? They are mostly obsolete now but you used it to find a phone number of a name. DNS or Domain Name System does basically the same thing. The heavy lifting is one by the so-called DNS servers. How does DNS work? Why IP addresses are important and why…

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Basics

What is an IP address and why is it important for VPN?

Let’s start the explanation with an analogy. You must live somewhere and have an address. If you order a brand-new Raspberry Pi (to build a VPN router for example) the package can be delivered according to your address. In a computer network like the Internet, data packets are delivered. In order for the server, service…

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Basics

VPN or Virtual Private Network: What is it and why do I need one?

A VPN or Virtual Private Network is a direct connection between two networks via a public connection such as the Internet. In order for me to explain to you exactly how a VPN works, a few short and simple basics are necessary. Don’t worry, I will keep it understandable. How do I connect to the…