Configuration

An overview of the most important Linux commands

Under Linux, all actions that you can carry out with the mouse and window system via the graphical user interface can also be performed using program calls in the terminal – provided you know the appropriate command and how to use it according to the correct syntax. To make working in the terminal easier, we provide you with an overview of basic Linux commands with detailed descriptions and practical examples. [...]  

Docker tutorial: Installation and operation of the container platform

The open source container platform Docker is quite exciting to the open source community. As an alternative to hardware virtualization based on virtual machines, Docker has made the use of software containers acceptable outside of the Linux universe. In our tutorial for beginners, we break down the Docker trend from the ground up. With these clear, step-by-step instructions, learn how to install Docker, what the deal is with its images, and how to download these images from the Docker hub and run them locally as containers. [...]  

Ubuntu FTP server: How the setup functions

For the past 30 years, the file transfer protocol (FTP) has supported computer users with the transfer of data in TCP/IP networks. FTP servers enabled not only the upload but also the download of files, in which each access is controlled via a separate connection. In this Ubuntu FTP server tutorial, you’ll learn how to install, configure, and run your own server under the Linux distribution. [...]  

Equip Raspberry Pi with a static IP address

Both the private Raspberry Pi IP address and the public IP address of the internet connection are constantly changing for most users. Such dynamic IP addresses aren’t practical for the use of a minicomputer. But if you want to use server software effectively on your Raspberry Pi, you need a static IP address for the computer in the local network. The internet access used to make the server accessible online also requires a constant address. This guide explains how to set it all up. [...]  

DHCP: What’s behind the Dynamic Host Configuration Protocol

If you’re connected to an internet router and power on your computer, it automatically obtains the necessary network parameters, such as the IP address, subnet mask, or DNS server. This is made possible by the Dynamic Host Configuration Protocol (DHCP), which simplifies address assignment when connecting to the internet and makes setting up local networks easy as pie. [...]  

The right configuration to secure your server

If you operate or rent your own server, it is your responsibility to protect it against failures and external access. You can immediately begin to set the foundation for this when configuring the server, if you have the necessary administrative rights. The correct settings can work wonders, especially with encrypted remote connections via SSH protocol, and greatly increase security. [...]  

HTTPoxy: Threatening the security of CGI applications

Fifteen years after the discovery of the security flaw HTTPoxy, it’s still an issue with CGI applications. The reason for this is the fact that the Common Gateway Interface standard provides the use of environment variables to process HTTP requests. These can include header contents that modify the original proxy configuration, allowing hackers to redirect data packets to a completely foreign server. [...]  

Set up Raspberry Pi as a VPN server: OpenVPN tutorial

If you set up your own VPN server, then you can access your local network from any internet connection, not to mention allowing you to move around the internet more securely, while also being encrypted, from public WLAN networks. This tutorial shows that the Raspberry Pi mini-computer and the already established OpenVPN program are perfectly sufficient for the creation and operation of a VPN server. [...]  

NGINX tutorial: the basic commands and configurations

Nginx is very different from traditional server software such as Apache in the way that it responds to client requests and the fact that it also involves configuration changes. In this nginx tutorial you can learn how to make changes without having to restart the web server software as well as how to set up a simple proxy server for images in just a few steps. [...]  

Remote access to the network storage

Are you using a NAS system as a home server and want to connect it to the internet? It’s simple to do. We explain how to assign a fixed LAN IP address to your network storage and open the corresponding ports for the desired service in the router firewall. You will also learn how to make your NAS system permanently available under a consistent address despite daily disconnections carried out by the internet service provider. [...]