ARR: Block PowerShell access to Exchange
In this tutorial, I will show you how to block PowerShell remote access to Exchange with ARR. As a security measure, if…
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# Security
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Proxmox: use the integrated Firewall to secure virtual machines
In this tutorial, we will see how to use the Firewall functionality integrated into Proxmox to secure virtual machines and manage network…
Exchange 2016: Enable Extended Protection
In this tutorial, I will explain to you how to activate extended protection (Exchange Extended Protection) on Exchange 2016 (and 2019 if…
Nginx – GeoIP: configuration
In this new tutorial dedicated to Nginx, I will explain to you how to configure GeoIP in order to be able to…
PowerShell: sign scripts
In this tutorial, I will explain how to sign your scripts. Before going into the subject, we will see why signing the…
Ubuntu: enable the firewall and manage it with UFW
In this tutorial, I will explain how to activate the firewall on a computer with Ubuntu and manage it with UFW. UFW…
Windows Server: disable a cipher suite
In this tutorial, I will walk you through how to disable a cipher suite also call cipher. If you arrive on this…
Crowdsec: protecting Windows servers
In a previous tutorial, I explained how to protect your Linux servers with Crowdsec in order to block "malicious" traffic. For almost…
Active Directory: change the KrbTgt account password
In this tutorial, I will explain how to change the password of the KrbTgt account. Before explaining how to change the password…
Active Directory: Secure Domain Join to Domain Admins
In this tutorial, we will address a security point on an Active Directory environment, which is the domain joining of computers. What…
GPO: block programs and prevent software installation – software restriction
In this tutorial, I will explain how by Group Policy (GPO) in an Active Directory environment, block the launch of programs and…
Active Directory: harden the security of your environment
In this tutorial dedicated to Active Directory and security, I will give you some tips to harden the level of security in…
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