Category: Security

Articles on cybersecurity, threat prevention, data protection, and security best practices.

Securing SSH Connections Using a Certificate on macOS or Linux
Below you’ll find the individual steps to secure your SSH connection to a server using a certificate (SSH key).

1. Create an SSH Key

Open the terminal on your Mac (or Linux system) and run the following command to generate an SSH key pair:
Bash
```
ssh-keygen -t ed25519 -C "deine_email@example.com"
```
- The -t ed25519 parameter specifies ED25519 as the encryption algorithm.
- The -C "your_email@example.com" adds a comment, such as your email address, to the key.
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31. May 2025
Configuring the Tailscale Exit Node in the Admin Console

Step 7 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

IIn the final step of the series, the Tailscale exit node is declared within the Tailnet. After this, you’re ready to use Tailscale.

You can view all Tailscale machines in the overview: https://login.tailscale.com/admin/machines.
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30. May 2025
Configuring Tailscale as an Exit Node in Detail

Step 6 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

In this part of the series, each step of the setup script from the previous article is explained in detail.

If you’re not interested in the technical background, you can skip this part.
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30. May 2025
Configuring Tailscale as an Exit Node using a Script

Step 5 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

In this part of the series, I’ll show you a script that prepares the Ubuntu Server network settings for Tailscale.
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30. May 2025
Installing Tailscale on Ubuntu Server

Step 4 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

In this part of the series, you’ll learn how to install Tailscale on an Ubuntu Server.

Go to https://login.tailscale.com/start to sign in to Tailscale.
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30. May 2025
Configuring the firewall and establishing an SSH connection to Ubuntu Server

Step 3 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

In this part of the series, you’ll configure the server’s firewall.

After completing the installation and updating all packages, you’ll configure the firewall using ufw.
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30. May 2025
Installing Ubuntu Server

Step 2 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

In this part of the series, you’ll learn how to install Ubuntu Server step by step.

Preparing the Ubuntu Server installation

With the login credentials you received, log into the netcup Server Control Panel.

Select your server, then click on Settings on the left. Here you can set the keyboard layout and adjust the UEFI settings. I selected “de” for the keyboard and enabled UEFI boot. You can leave the other settings as they are.
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30. May 2025
Ordering the server

Step 1 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

First, you need to order a server. I’m using netcup as a provider, but you can choose a different one as long as it offers similar features.

To use a server as a Tailscale exit node, you don’t need much computing power or memory. In general, the smallest vServer from netcup with 2 GB RAM and 2 vCores should be sufficient.
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29. May 2025
Bypass internet restrictions and protect your privacy on public Wi-Fi – Your Path to a Free Internet

In many parts of the world, free access to the internet is not a given. Websites are blocked, messaging apps are restricted, and critical content is censored. This raises the question: How can I stay online – freely and securely?

This article series shows how to set up your own stable and encrypted connection using Tailscale, a modern VPN based on the WireGuard protocol – especially useful in countries with restrictive internet laws.
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29. May 2025

Category: Security

1. Create an SSH Key

Step 7 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

Step 6 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

Step 5 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

Step 4 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

Step 3 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

Step 2 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi

Preparing the Ubuntu Server installation

Step 1 of the series: Bypass internet restrictions and protect your privacy on public Wi-Fi