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, we will see how to use the Firewall functionality integrated into Proxmox to secure virtual machines and manage network flows. Presentation of the firewall in Proxmox Proxmox allows you to manage a Firewall at the Hypervisor level which allows you to manage network flows at the levels: This configuration can be done …
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, I will explain how to activate the firewall on a computer with Ubuntu and manage it with UFW. UFW for Uncomplicated Firewall is a simplified Netfilter command line utility, it is a simple alternative to iptables, which allows to manage firewall rules. If UFW is not installed, use the following command to …
In a previous tutorial, I explained how to protect your Linux servers with Crowdsec in order to block “malicious” traffic. For almost 2 months now, the Crowdsec version has been available for Windows. If you are not yet familiar with Crowdsec, here is a brief presentation: Crowdsec will analyze different log files (Web, firewall, SSH, …
In this tutorial, I will explain how to change the network profile of the firewall on Windows. It happens that after a restart, the profile of the firewall goes private, we will see how to change it back to the domain profile. The connection profile on a network adapter is especially useful when different firewall …
Presentation In this tutorial, we will see how to add rules to the Windows Firewall using Group Policy. For information, the Windows Firewall has been implemented in the Windows operating system with service pack 2 (SP2) of Windows XP. It is now part of the system and some functionalities like DirectAccess requires that it be …
In this article, I’ll explain how to declare a vlan on your Sophos XG firewall. Before you create it on the firewall, you must make sure that the port of the switch where the firewall is connected is tagged. Go to the firewall administration web interface, in the left menu click NETWORK 1 . The …
In this tutorial, we will have how to install a Sophos XG firewall on a virtual machine with Hyper-V. For this article, I used the Sophos XG home version which is available for free. Prerequisites Download the ISO firewall on the site sophos and recover the license key that will be sent by email. Create a …
Introduction In this tutorial, we will see how to secure emails with a Sophos XG firewall. The firewall offers two modes of operation for filtering emails: MTA : the firewall will act as an SMTP relay Legacy : it will be placed in transparent mode, which we will see in this tutorial. In both modes …