How to improve your SSH security

With Secure Shell (SSH) a default configuration can be vulnerable to hackers who are trying to gain access to your server. In this guide, we will provide you with a few configuration changes on how you can improve the security of SSH on your server. First, make sure that you have a user account with […]

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How to reset or change a password

Did you forget the root password for your server? Not to worry, if you have local access to your server and your system is using GRUB as a bootloader you can follow our tutorial. This method works on most Linux operating systems but not limited to: Ubuntu, CentOS, and Debian. We have also included a […]

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How to add or remove a user on your Linux server

In this guide, we will explain how to add and remove a user on your Linux server. There are small differences in the different Linux distributions. With Red Hat based distributions you will not be prompted to enter a password. With Debian based distributions you will be prompted to enter a password. You are also […]

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How to configure IPv6

Introduction It is possible to request an IPv6 subnet for your WorldStream server. To request this you can contact us or open a ticket in your my.worldstream account. You can use the IPv6 address next to your IPv4 address. In this article, we will explain how to configure an IPv6 address on your server. Please […]

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Firewalld basics

Introduction In this guide, we will explain the basics of the Firewalld tool. The Firewalld tool is used by default on CentOS 7.x and 8.x, but the tool can also be installed on other distributions of Linux. Basic commands With firewalld it is advised to use the firewall-cmd command. By default, this command only applies changes to […]

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Iptables basics

Overview This guide is meant to explain and help with the setup of iptables. With this tutorial you should be able to perform the basic setup of iptables. With this Linux firewall tool you are able to improve the security of your server. In this article the following subjects will be covered: Basic explanation Basic […]

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Ufw firewall basics

Introduction In this guide, the basics of the ufw firewall tool will be explained. The ufw firewall tool is used by default on Ubuntu 18.x however the tool can also be installed on other distributions of Linux. Ufw is a very straightforward command. Ufw stands for Uncomplicated Firewall. By default ufw is disabled. Below we […]

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How to change the SSH port

The default SSH port is 22. If you wish to change the SSH port for your Linux server to for example 30200 you can do this the following way: Connect to your server with the default SSH port with the SSH client of your preference. Edit the configuration file with for example nano or vi […]

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How to add additional static IP’s

Identify the main interface If you want to add a secondary IP, this will be added in addition to your main interface. We will need to identify the main interface to setup additional IP addresses. Locate the interface with your current main IP address. Use command ip a to show all the network interfaces that are […]

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Mounting a disk in Linux

Locating the disk In this tutorial we will show you how to create a partition and a filesystem. After we will mount the disk and make sure the changes are kept when a reboot occurs. Before we start mounting a disk, we will make sure we have the correct disk. In the example below we […]

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