In this tutorial dedicated to Windows Server 2025, I suggest you see or review how to install the DHCP Server role in order to provide automatic IP configuration to the computers on your network. If you are familiar with the DHCP service in Windows Server, the implementation in Windows Server is identical. Before getting into …
In this tutorial, I will explain how to change Docker’s default address range. By default, Docker uses class “B” private addresses from 172.17 to 172.32. For each “stack” or container, it will assign a range with a mask in /16. Here is an example : In some cases, it may be necessary to modify this …
In this tutorial, I will explain to you how to create a private network on Proxmox and configure NAT so that the LXC/CT containers and virtual computers in this network have access to the Internet. Using NAT in this situation will bring out the VM and CT to the Internet with the IP address of …
In this tutorial, I will explain to you how to set up network inventory in GLPI 10 with GLPI Agent. This is the functionality equivalent to network discovery and inventory with FusionInventory: Fusion Inventory: Configuring Discovery and Inventory Tasks – 247-IT Presentation of network inventory with GLPI Agent The network inventory allows you to discover …
In this tutorial, I will explain how to easily delete a firewall rule managed by UFW. UFW is a command line interface that simplifies the use of iptables rules. To delete a rule, you must first display the list of rules with their number: The command returns the list of rules as below: To delete …
In this tutorial, which is a special case, I will explain how to solve the 404, 407 and 408 error that can occur on a DNS server with Windows Server under the following conditions: If you are in this particular configuration, it is possible that on your DNS server, you encounter the error 404, 407 …
In this tutorial, I will explain how to configure an IP address on a network card on a Windows server. This operation is not complicated, but there are several solutions to achieve the same result that we will see in this tutorial. Use sconfig to configure an IP address sconfig for ServerConfig is a command …
In this tutorial, I will explain how to force DNS registration of computers by Group Policy (GPO) in an Active Directory environment. Maintaining a clean, up-to-date DNS (Active Directory) zone is not easy, especially with dynamic computer registration. The first step is the activation of automatic cleaning, but it happens that once this is activated, …
Here is how to display the default gateway on Ubuntu from the command line. Ubuntu 20.04 + (without net tools) Ubuntu 18.04 – (with net-tools)
In this tutorial, I will explain to you how to secure the network part of your web servers with Crowdsec. The tutorial is made on Ubuntu 20.04 Crowdsec overview Crowdsec is an open source tool that allows you to “secure” or rather add a layer of security to your Linux servers (soon Windows too) by …