Hi, my name is Jan

I am a technology enthusiast
I consider myself a NetScaler Specialist
I am the artist formerly known as nsroot
I am the lead developer of the CoreLogic framework for NetScaler
I am in love with Infrastructure-as-Code and Automation
I am a Citrix Technology Professional (CTP) member
I dabble with Go

Jan Tytgat

Owner | Senior Architect at CoreLayer BV

I am a passionate NetScaler engineer with more than 15 years of working with Citrix technologies, with a strong focus on security and automation. From that passion, I was able to start my own company to assist customers with all sorts of challenges, while also trying to give back to the community as much as possible. I am the lead developer of CoreLogic, a configuration framework for Citrix ADC. This blog serves to gather all my knowledge for the community, as well as a documentation repository for myself.

Citrix Technology Professional 2021-2024

Citrix Certified Expert - App Delivery and Security (CCE-AppDS)

Citrix Certified Associate - App Delivery and Security (CCA-AppDS)

Citrix Certified Professional - App Delivery and Sercurity (CCP-AppDS)

Citrix Certified Associate - Virtualization (CCA-V)

Skills

NetScaler

Expert in designing and deploying Citrix ADC solutions across all form factors.

Fortinet

Capable of designing and deploying advanced Fortinet stacks.

Kubernetes

Capable of deploying, managing application on Kubernetes. Experienced in writing Kubernetes controllers for CRDs.

Go Development

Junior Go developer, using it as the main language for professional development.

Docker

Write most of the programs as dockerized container. Experienced with multi-stage, multi-arch build process.

Prometheus

Capable of setup, configure Prometheus metrics. Experienced with PromQL, AlertManager. Also, experienced with writing metric exporters.

Linux

Using as the main operating system for development. Capable of writing bash/shell scripts.

Git

Experienced with git-based development. Mostly, use Github. Also, have experience in working with GitLab.

Experiences

CoreLayer BV

Mar 2018 - Present

Bruges, Belgium

CoreLayer is a managed service provider and knowledge center for Citrix NetScaler (ADC) and Fortinet products, providing application delivery and security services to clients ranging from SMB to Enterprises and Governments across Europe.

Owner | CEO | Senior Architect

Mar 2018 - Present

Responsibilities:

Daily management of the Company
Product development
Consultancy for Citrix, NetScaler and Fortinet products
Managed Services for NetScaler and Fortinet environments

SAM Office BV

Oct 2014 - Present

Horst a/d Maas, The Netherlands

SAM Office BV is a general ICT service and hosting provider.

Senior Consultant & Advisor

Jan 2024 - Present

Responsibilities:

Advisor to the CEO.
Senior Consultant
Responsible for the Citrix NetScaler deployment internally and at customers.

Partner | Senior Consultant & Advisor

Jan 2015 - Dec 2023

Responsibilities:

Advisor to the CEO.
Senior Consultant
Responsible for the Citrix NetScaler deployment internally and at customers.

Senior Consultant

Oct 2014 - Jan 2015

Responsibilities:

Citrix consultant
Responsible for the Citrix ADC deployment internally and at customers.

Econocom NV (Centix)

Aug 2013 - Sep 2014

Zaventem, Belgium

Security Consultant

Aug 2013 - Sep 2014

Responsibilities:

Citrix ADC consultancy
Fortinet consultancy

Centix NV

Dec 2008 - Aug 2013

Kruishoutem, Belgium

Virtualisation Consultant

Dec 2008 - Aug 2013

Responsibilities:

Citrix consultancy

Pareteum (Artilium)

Jun 2006 - Nov 2008

Loppem, Belgium

System Engineer

Jun 2006 - Nov 2008

Responsibilities:

Installing and configuring infrastructure for MVNE/MVNO
Customer service engineer for troubleshooting the ARTA-platform
Education services for customers around billing within the ARTA-platform

Projects

CoreLogic

Lead Developer Oct 2014 - Present

Configuration framework for Citrix ADC

development netscaler

go-jobs

Lead Developer Mar 2024 - Present

Job scheduling library in go

development go golang

Continuous Learning

Continuous Learner Jan 2023 - Present

Continuous Learning example files

continuouslearning homelab professional academic hobby

NetScaler SDX Migration

Senior Consultant Jul 2024 - Jan 2025

Migration from old NetScaler SDX appliances to new NetScaler SDX appliances

consultancy netscaler

Recent Posts

Developing a job scheduler in go

Table of contents History Introduction Source Documentation Tests Packages Overview Cron Task Job Orchestrator History Date Changes 2024/10/04 Initial publication Introduction For some tools I am working on related to Citrix and NetScaler, I needed the capability to schedule jobs or commands at a fixed time or at an interval. While technically possible to use “cron” on Linux/BSD-based operating systems, and “scheduled tasks” on Windows, I wanted to provide the capability through the tool itself when running as a daemon or windows service.

Friday, October 4, 2024 Read

Deploying NetScaler VPX on Proxmox VE

Table of Contents History Introduction Deployment Create an “empty” virtual machine Modify hardware Increase hard disk size Add a secondary hard disk Modify options Convert to template Startup History Date Changes 2024/09/09 Initial publication 2024/09/12 Added informational message about memory requirements. (thanks Morten Kallesøe) 2024/09/12 Added information message about cpu requirements. Introduction There is a lot of information available in the official NetScaler VPX deployment documentation. However, one hypervisor in specific is missing: Proxmox.

Monday, September 9, 2024 Read

Day 002 - Packer integration with 1Password

Example files for today can be found in my Continuous Learning repository at https://github.com/jantytgat/continuouslearning/tree/main/2023/day002 Introduction In college, I started tinkering with Debian (Debian GNU/Linux 3.0 - Woody) as my first introduction to other operating systems besides MS-DOS and Windows. The use of deb-packages through apt-get felt so natural that I never got around to using Red Hat or Fedora in a sensible way (yum always felt broken).

Thursday, January 5, 2023 Read

Day 001 - Setting expectations

Introduction Welcome to day 1 of of my continuous learning track for 2023. As mentioned in the overview for 2023, I have a bunch of topics I want to learn more about. Of course, these expectations don’t come out of the blue, they apply either directly or indirectly to projects and ideas I’ve been working on. As you can read on the homepage of my blog, I specialize in management of NetScaler and Fortinet appliances. Products from both vendors generally require quite a bit of knowledge to operate efficiently, especially in the managed services arena. As I run these products in my homelab as well, I try to tinker with them as much as possible because I obviously don’t know everything. The list below is obviously just an initial starting point, as there will be many other topics to explore as a sidetrack.

Wednesday, January 4, 2023 Read

Day 000 - Overview

Introduction I’ve finally decided to renew my focus on blogging about my adventures in IT. As it is only human to forget things over time, it is essential to have a good habit of documenting pretty much everything. As we are all living our busy lives, bringing up children, having hobbies outside of tech or just because “life happened”, it’s also a habit I’ve neglected for some time. So, what is the purpose of all this, you might ask?

Tuesday, January 3, 2023 Read

Managing a Hugo theme using git submodules

Introduction For this Hugo-powered website, I decided to use the Toha theme, available on Github. Although the documentation has a great “Getting started” guide, I was missing some steps on how to upgrade a theme to its current version. Following some comments, apparently this is not something that is done often, unless there are significant updates in either functionality or layout. I tend to disagree, so I want to make sure I have the correct steps at hand.

Friday, March 25, 2022 Read