Category: Citrix

  • Notes from the field: NetScaler VPX & Intel Xeon Gold

    Quite recently I came across an issue when deploying a VPX instance on VMware 6.5, which resulted in a bug of the VPX image and underlying physical hardware. For reference the following hardware was backing the hypervisor: Supermicro SYS-2029U-E1CR25M Intel(R) Xeon(R) Gold 5118 CPU @ 2.30GHz VMware ESXi, 6.5.0, 7967591 with vSAN NetScaler VPX 12.0…

  • Notes from the field: NetScaler maxloginattempts

    Came across a very peculiar issue at a customer in regards to the values: Max Login Attempts Failed Login Timeout As soon as a value has been put in you could not reset it to the default value of 0, not from the GUI or CLI it would just not accept it as a value…

  • Notes from the field: uberAgent to the rescue!!

    We all know it, the once in a while “it’s slow logging  on..” and then it gets dropped at the escalation desk for a resolution. So I got the call for troubleshooting this issue. Since I knew from previous experiences that uberAgent is the troubleshooting tool you will want for this I contacted them and…

  • Notes from the lab: NetScaler VPX nsnet_connect prevents logon

    When I started to rebuild my lab I came across the most strangest thing when configuring my NetScaler’s again. First a little background regarding my setup: VMware ESXi 6.5u1 Hypervisors NetScaler VPX 1000 Platinum Appliances Distributed vSwitches with vlan trunks enabled Dedicated NSVLAN for management (tagged) Data transport vlan tagged   Whilst configuring and setting…

  • Notes from the field: XenDesktop RemotePC and Multi Licensing

    Recently I got involved at a customer location which was going to use Remote PC catalogs in combination with their XenDesktop / XenApp 7.15 environment. This was no problem whatsoever to configure but on closer testing I encountered a bug that when you create for example a delivery group called “Windows 10 Remote PC” and…

  • Notes from the lab: NetScaler Secure Web Gateway

    Finally had some time to implement the NetScaler Secure Web Gateway in my lab. I’ve put together a small document with my findings attached here: NFTL_TF_NSWG comments or questions please let me know. Cheers.

  • Notes from the lab: Windows Server 2016 black screen when launching any application

    I came across an issue in my lab environment where the screen will go black while launching a session on Windows Server 2016. This is with XenApp/XenDesktop 7.15 LTSR The following registry entry: DisableLogonUISuppression (D WORD Value 0) did not resolve the issue as stated in the following articles: https://support.microsoft.com/en-us/help/4034661/windows-10-update-kb4034661 and https://support.citrix.com/article/CTX225819 Ultimatly after some…

  • Notes from the field: XenMobile Certificate Based Authentication lessons learned

    Throughout the XenMobile deployments with Certificate Based Authentication(CBA) I came across some items which I thought was worth mentioning. 1. CBA up until Secure Mail 10.6.20 / Secure Hub 10.6.20 was requesting new certificates on SSL exceptions, in effect the exceptions were triggered on every SSL connection error that occurred and thus requesting a new…

  • Notes from the field: Be Proactive! Apple ATS is coming

    For those who are not aware Apple has an upcoming change regarding App Transport Security (ATS) https://developer.apple.com/news/?id=12212016b The date it should be in effect was originally January 2017… but was pushed back for migration purposes, and the new date is yet a mystery. It will have impact! Be proactive and check your XenMobile / NetScaler…

  • Notes from the field: NetScaler SDX LACP Flapping issue

    I came across a peculiar issue regarding a new NetScaler SDX 14020 setup in combination with a Cisco Nexus C9372-PX-E and C9336PQ infrastructure, a new buildup of the SDX/VPX with multiple HA instances spinning and a working environment. LA sets configured for HA probes and everything nice and easy separated through vlan access. Long story…