HowTo on John Billekens | Notes from the field

HowTo - Update the Citrix FAS Authorization Certificate

Mon, 07 Jul 2025 19:54:57 +0000

group: “Citrix FAS”

When you are using Citrix FAS you will also have a Authorization Certificate. Without this certificate Citrix FAS would not be able to function. The same is applicable when the Authorization Certificate is expired, FAS can no longer do it’s job. When the Authorization Certificate is expired users are no longer able to login. Because FAS cannot request new smartcard certificates for a user.

HowTo - Configure NetScaler ADNS as an Authoritative DNS Server for a Subdomain

Sun, 23 Feb 2025 19:24:49 +0000

group: “NetScaler”

In this HowTo article, we’ll walk through the complete process of configuring a Citrix NetScaler HA pair to serve as an authoritative DNS server for a subdomain. This step-by-step guide covers everything from setting up the Authoritative DNS (ADNS) service on the NetScaler to delegating the subdomain in the parent domain’s DNS management panel. Whether you’re looking to improve DNS resolution performance, gain more control over DNS records, or support advanced NetScaler features, this guide will help you get it done efficiently and securely.

HowTo - NetScaler - Upgrade firmware

Sat, 10 Feb 2024 21:00:55 +0000

group: “NetScaler”

Upgrading firmware on time is crucial for the business continuity. Especially when new firmware become available containing fixes for high CVE’s we have seen recently.

This how to guide focuses on upgrading the NetScaler manually. If you are using an ADM appliance or ADM service, you can use those as well, to automatically upgrade the node(s).

HowTo - (Pre upgrade) Cleanup

Sat, 10 Feb 2024 20:57:37 +0000

group: “NetScaler”

Before you start an upgrade. You must make sure to have enough free space available. Although in the GUI you see sometimes that you must have 5 GB available, in my experience you need at least 6,5 GB free space.

HowTo - NetScaler - Create a backup

Mon, 23 Oct 2023 13:07:03 +0000

group: “NetScaler”

A backup can save you a lot of time in case of emergencies, configuration errors or hacks. You could download and save it in a secure environment. And when needed restore a new appliance with the saved backup.

HowTo - NetScaler - Update Certificate

Wed, 18 Oct 2023 13:27:47 +0000

group: “NetScaler”

In this how-to article I will explain the procedure how to update a certificate on a Citrix NetScaler. If you wait until a certificate is expired wil cause a lot of issues for your users or visitors. By being on time with the renewal will save you a lot of trouble.

HowTo - NetScaler - Install Certificate

Wed, 18 Oct 2023 12:38:35 +0000

group: “NetScaler”

In this how-to article I will explain the procedure how to install a new certificate on a Citrix NetScaler. Certificates are an important piece in a secure connection from a client to a server.

HowTo - Windows - Export certificate (pfx)

Wed, 18 Oct 2023 09:45:25 +0000

group: “Windows”

Certificates are an important part of a modern environment. They make communication safer by encrypting the traffic between the client and server. A safe way to move certificates between servers or store them safely is by exporting the certificate (private and public key) to an encrypted format. A commonly used format is “pfx” (Personal Information Exchange also known as PKCS#12). A pfx file can contain one or more certificates and is encrypted with a password. Without the correct password the pfx is useless. You commonly see that a pfx contains a (web) server certificate and one or more intermediate certificate(s) and a root certificate.