Generate a Let’s Encrypt Wildcard Certificate with Certbot and Cloudflare (DNS-01)
Step-by-step tutorial for generating a Let’s Encrypt wildcard certificate with Certbot using the DNS-01 challenge for a domain hosted on Cloudflare.
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# Certificate
18 articles
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ADFS: How to replace the SSL certificate
In this tutorial, I’ll explain how to replace the SSL certificate on ADFS (Active DirectoryFederation Services). This step is necessary when renewing…
Windows Server 2025: Install the AD CS role – Enterprise Certification Authority
In this tutorial, I will explain how to install the AD CS (Active DirectoryCertificate Services) role, which allows you to set up…
Sign RDP files and secure RDS farms after the April 2026 Windows updates
Since April 2026, Windows has required the signature of RDP files and an enhanced configuration of RDS farms. Find out how to correct errors, sign your RDP files and secure your infrastructure step by step.
Active Directory: Configuring the LDAPS Protocol
In this tutorial, I will explain how to configure the LDAPS protocol in an environment Active Directory with secure connections to domain…
Add and assign an SSL certificate on Exchange 2016 and 2019
Learn how to add and assign an SSL certificate on Exchange Server 2016 to secure communications between your users and the email server
Create a sub-certificate authority with AD CS
In this tutorial, I will explain how to create a sub CA with Windows AD CS. Sub-CAs are underused on firewalls when…
Ubuntu: add a certificate from an internal certificate authority
In this tutorial, I will show you how to add the certificate of an internal CA on an Ubuntu machine. In business,…
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…
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…
Nginx: generate a Let’s Encrypt certificate
After seeing how to install and configure Nginx as a reverse proxy and harden security with Crowdsec, I will explain in this…
PFX certificate: extract the certificate and the private key
In this tutorial, I will explain how to extract the certificate and the private key from a certificate in PFX format with…
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