The IT Stories

The Good, the Bad and the Ugly

  • Notes from the field: Citrix NetScaler “VPX” hard drive errors

    In a particular case with one of our customers we encountered the reporting messages “Hard disk drive errors” in our logging and checked the solution with the customer, at first all seemed to be alright and no issues but this particular node would keep giving the event entries. From article https://support.citrix.com/s/article/CTX214458-netscaler-vpx-hard-drive-errors?language=en_US all indicates that the…

  • Notes from the field: The case of AppLayering and Office updates or is it?

    Earlier this year we had an customer who out of the blue have Office disappearing and all issues regarding native/published application dependancy hell with it. This would be a recurring issue each time around vacation time of the customer. Well we work with a peal the onion principle and started out dissecting the image of…

  • Notes from the field: Citrix StoreFront cannot change password New UI (Technical Preview)

    In a recent troubleshoot with a customer it came to light that password change message would occur and a broken form would be shown to the user. After some troubleshooting it came to light that the next gen UI would be enabled and password change options aren’t fully feature parity yet. The at logon would…

  • Notes from the field: Citrix NetScaler Native OTP stopped working

    In a recente P1 outage at a customer we got messages that some users would not be able to logon and some would, authentication debugging would show cascading events that would work and some that would deny logons. In this particular setup there are two MFA solutions, one not native to the NetScaler and one…

  • Notes from the field: Citrix CVAD site and the year destruction bug

    Just for the holiday we got a strange issue that from the CVAD side and MCS updates the interactions wouldn’t work anymore and that machines would stay on and no power cycle actions would be working throughout the night for the daily reboots. After a troubleshoot with the customer we found out that one of…

  • Notes from the field: Citrix AppLayering 2409 Edge changes

    In the latest upgrade for a customer who was using application layers for their browser got a nice empty browser after the latest upgrade to Citrix AppLayering. Turns out that starting from version 2409 the only supported behaviour is an OS layer for that. See the following https://support.citrix.com/s/article/CTX399422-how-to-configure-microsoft-edge-in-an-app-layering-environment?language=en_US This is fundamental design change that you…

  • Notes from the field: Citrix NetScaler and the authentication policy limit

    For a customer who is using the NetScaler as a IDP/SP service with the NetScaler Gateway and some service provider requirements we had a nice policy limitations which caught us by surprise: https://support.citrix.com/s/article/CTX227301-error-32-authentication-policies-are-already-bound-while-binding-authentication-policy?language=en_US#:~:text=When%20multiple%20policies%20(two%2Dfactor,binding%20for%20one%20virtual%20server. The mentioned RFE is still in the works or forgotten but to solve this little puzzle you’ll need to go to the…

  • Notes from the field: Citrix NetScaler Admin Partitions Cleanup

    In a previous blogpost we’ve discussed some pain points regarding a whole bunch of admin partitions and the inability to upgrade regarding disk space usage, see it here: https://www.technicalfellow.com/2023/12/notes-from-the-field-citrix-netscaler-partitions-performance-and-pain/ After a support case and discussions about when to use the reporting feature of the NetScaler or not, we needed a solution to clean all those…

  • 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…

  • 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…

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