The Good, the Bad and the Ugly

Notes from the field: Citrix NetScaler, partitions, performance, and pain
On a recent joint project with my partner in crime Anton van Pelt there was a long outstanding support issue which needed our dedicated attention. Long story short we have a customer in a nice new greenfield which got migrated from F5 to NetScaler and the introduction of Citrix Gateway and migrated the backend to…
22 December 2023
Notes from the field: Citrix Gateway DTLS fail-over UDP/TCP
On a recent troubleshoot a customer complained that after a failover all ICA sessions would do a fallback to TCP and not uplift again to UDP until the DTLS checkmark would be disabled/enabled Well this worked in the past but since 13.0 build 58.x we have the ability to create a DTLS listener VIP for…
7 November 2023
Notes from the field: Horizon and the locked.properties debacle
On a recent Horizon deployment version 2212.1 we just couldn’t get the workings correctly with the portalhost/balancedhost entries, the “workaround” for that matter until we get it sorted out is to turn back on the unexpected host feature like below: allowUnexpectedHost=true checkOrigin=false enableCORS=false Well this worked only for the original installed URL of the connection…
25 October 2023
Notes from the field: Just one of those days that nothing goes as expected
Just a quick blog that these day’s it can be very difficult or very simple in regards of troubleshooting and resolving issues in a deployment. Let me take you on a journey 😉 Journey 1: UAG deployment fresh as fresh and no working logon page after a valid deployment, at first troubleshooting, troubleshooting, redeployed with…
25 October 2023
Notes from the field: Citrix Gateway Advanced Auth RADIUS SSO not working
In the last couple of months, I came across some NetScaler redeployments regarding the latest CVE and on the other hand moving over from basic policies to advanced policies. For this to work we are depending on the AAA setup with authentication profiles to combine it all with a Citrix Gateway deployment. For RADIUS there…
15 September 2023
Notes from the field: The Kerberos chronicles, the one with certificate-based authentication
If you’ve read my previous Kerberos chronicles blogs you see a trend with the Microsoft patches, hardening updates and with this one the upcoming strong mapping / full enforcement mode of certificate-based authentication. See the following article for explanation: KB5014754—Certificate-based authentication changes on Windows domain controllers – Microsoft Support This one is going to have…
31 May 2023
Notes from the lab: VMware Workspace ONE and the home-lab setup for one external IP
Just a quick blog for setting up your home-lab and use all the VMware Workspace ONE services on the UAG’s with one external IP. Our starting point is based on the following articles: Unified Access Gateway Appliances Deployed in a Double DMZ (vmware.com) – follow the steps for double DMZ deployment, Minimum/Optional Horizon Protocols and…
24 April 2023
Notes from the lab: Some magic, integrating Citrix resources with VMware Access
Like my friend Edwin de Bruin explains in his blog(s): Migrating from Citrix Gateway to VMware Access Workspace One: Part one (debruinonline.net) and Migrating from Citrix Gateway to VMware Access Workspace One: Part Two! (debruinonline.net) he expects me to deliver you all some magic. For this blog I’m going to start with the necessary resource…
1 March 2023
Notes from the field: Microsoft Azure MFA Number Matching and the one with NPS extension
Regarding the upcoming change of Microsoft MFA number matching, some customers started to ask me hey what’s going on? Do we need to do something? Is there any impact for our users? Well, the short answer is yes. The long answer is well it depends, can we live with the current setup or is there…
6 February 2023
Notes from the lab: Citrix XenMobile 10.15 upgrade fails
Regarding my own XenMobile deployment I had a 10.14 Rolling Patch environment 6 running and updated it to Rolling Patch 9 before the eventual upgrade to 10.15 base. This all is very easy to do and all the required information is presented at Release notes for Rolling Patches | XenMobile Server Current Release (citrix.com) regarding…
11 January 2023