Book review “Windows Server 2012 Automation with PowerShell CookBook”

May 20th, 2013 by Jack Cobben No comments »

9465EN_0_PowerShell_Packt_EbookPackt publishing contacted me recently to review a new book they published on automating Windows Server 2012 through PowerShell.

Ed Goad has written this book and in the first chapter he goes rather quickly through the PowerShell commands. If you don’t have any PowerShell knowledge I suggest you first learn to understand it first. Ed explains the basics well, but for a novice on PowerShell it’s to little.

Ed Goad goes into great detail in how you can automate Windows 2012. From installing and managing IIS to setting up Hyper-V and backing up your 2012 server. Ed explains it all.

I love the great detail in which he explains all features iwith the help of screenshots and example scripts you can use right away.

If you don’t have this book yet, I would recommend it to add this to your bookshelf and read it. Only downside I can see is that you need to have some knowledge of PowerShell. Otherwise you will have some difficulty getting through it. Don’t get me wrong, you’ll get through it and you can do all the steps and tasks after reading it but it will take you a little more time.

Hope you find this review usefull.

Until the next book review or blogpost wlEmoticon-winkingsmile.png.

Citrix Optimization Pack 1.3 for Microsoft Lync

May 17th, 2013 by Jack Cobben No comments »

hdxCitrix has released a new version of the HDX RealTime Optimization Pack for Microsoft® Lync®. This offers clear, crisp high-definition video calls in conjunction with Microsoft Lync 2010 by leveraging the user device for local media processing. The Optimization Pack consists of the HDX RealTime Connector for Lync which connects to the Microsoft Lync 2010 client on XenDesktop or XenApp or VDI-in-a-Box, and the HDX RealTime Media Engine which runs on the user device as a plug-in to the Citrix Receiver. The HDX RealTime Media Engine is available for Windows, Linux and Mac devices. Version 1.3 of the Optimization Pack adds two additional authentication methods, TLS-DSK and Kerberos, plus Microsoft® Outlook/Office integration.

What’s new

A script on this page is causing your web browser to run slowly

May 16th, 2013 by Jack Cobben No comments »

In Desktop Director, the following message is displayed in Internet Explorer: “Stop running this script? A script on this page is causing your web browser to run slowly. If it continues to run, your computer might become unresponsive.” Note: This can occur when you have an unusually high number of Desktop Groups created.

Cause

When running scripts in Internet Explorer, the default threshold limit for the time-out dialog box (containing the message under Symptom) is 5,000,000 script statements for Internet Explorer 4 and later.

Resolution » Read more: A script on this page is causing your web browser to run slowly

Hotfix XS61E018 for XenServer 6.1.0

May 15th, 2013 by Jack Cobben No comments »

Citrix has released a new hotfix for XenServer 6.1.0.

This is a hotfix for customers running XenServer 6.1.0.

IMPORTANT:

  • For customers requiring the Cisco fnic driver, a driver disk compatible with this hotfix was issued in CTX137403 – Driver Disk for Cisco fnic v1.5.0.20 – For XenServer 6.1.0. Customers must apply the compatible driver before applying this hotfix.
  • Any other issued driver disk and the Driver Development Kit (DDK) for XenServer 6.1.0 must be updated to be compatible with this hotfix. See CTX137629 – Driver Disks for XenServer 6.1.0 with Hotfix XS61E018 for a list of the affected driver disks that must also be updated.
  • After applying the hotfix to all hosts in a pool, customers should update the required driver disks before rebooting the XenServer hosts.

Issues Resolved In This Hotfix » Read more: Hotfix XS61E018 for XenServer 6.1.0

Recommended hotfixes and updates for Windows Server 2012-based Failover Clusters

May 15th, 2013 by Jack Cobben No comments »
Below is the list of Microsoft Knowledge Base articles that describe the currently available fixes. Most of the updates will apply to computers running the Windows Server 2012 operating system. Some updates, like KB 976424, may be needed on computers running the Windows Server 2008 R2 or Windows Server 2008 operating system if they are present in the environment.

Windows Server 2012

Date added Knowledge Base Article Title Component Why we recommend this hotfix
2/27/2013 2813630 Virtual machine enters a paused state or a CSV volume goes offline when you try to create a backup of the virtual machine on a Windows Server 2012-based failover cluster Failover Cluster Service, CSV Filter and NTFS.sys This hotfix prevents a CSV failover by fixing an underlying issue in NTFS and by increasing the overall resilience of the Cluster service and CSV during expected pause states. To avoid CSV failovers, you may have to make additional changes to the computer after you install the hotfix. Available for individual download.
1/23/2013 2803748 Failover Cluster Management snap-in crashes after you install update 2750149 on a Windows Server 2012-based failover cluster Failover Cluster Management snap-in Resolves a crash in the Failover Cluster Management snap-in after update 2750149 is installed on a Windows Server 2012-based failover cluster. Available from Windows Update or Microsoft Download Center.
11/13/2012 2770917 Windows 8 and Windows Server 2012 cumulative update: November 2012 Multiple Improves clustered server performance and reliability in Hyper-V and Scale-Out File Server scenarios. Improves SMB service and client reliability under certain stress conditions. Install update 2770917 by using Windows Update in order to receive the cumulative update as described in KB 2770917.
11/13/2012 976424 Error code when the kpasswd protocol fails after you perform an authoritative restore: “KDC_ERROR_S_PRINCIPAL_UNKNOWN” KDCSVC Install on every domain controller running Windows Server 2008 Service Pack 2 or Windows Server 2008 R2 in order to add a Windows Server 2012 failover cluster. Otherwise Create Cluster may fail when attempting to set the password for the cluster computer object with error message: CreateClusterNameCOIfNotExists (6783): Unable to set password on <ClusterName$> This hotfix is included in Windows Server 2008 R2 Service Pack 1.

Here’s the link to the original article on the  Microsoft website.

Citrix Diagnostic Toolkit updated

May 14th, 2013 by Jack Cobben No comments »

Citrix support has updated the Citrix Diagnostic toolkit on May 13th (2013).

In this release we’ve added data collection options and tools for XenDesktop, Receiver, VDA, and PVS. We have updated the install wizard and changed the look and feel of several START menu options and shortcuts.

When installing Wire Shark on Windows 8 systems, follow the instructions on this LINK to address known compatibility issue with Pcap driver and Windows 8.

Symantec Endpoint Protection or antivirus programs with real-time scanning enabled, can delay the (packaging) sequence. See “The Packager” section below for details.

You can download the toolkit here:

Citrix XenServer Multiple Security Updates

May 10th, 2013 by Jack Cobben No comments »

A number of security vulnerabilities have been identified in Citrix XenServer. These vulnerabilities affect all currently supported versions of Citrix XenServer up to and including version 6.1.

The following vulnerabilities have been addressed:

  • CVE-2013-1918: Several long latency operations are not pre-emptible
  • CVE-2013-1919: Several access permissions with IRQs for unprivileged guests
  • CVE-2013-1952: VT-d interrupt remapping source validation flaw for bridges
  • CVE-2013-1964: grant table hypercall acquire/release imbalance

Mitigating Factors

Customers on versions of XenServer prior to XenServer 6.0 are only affected by CVE-2013-1918 which is a host denial of service attack. » Read more: Citrix XenServer Multiple Security Updates

Error HP driver not found on 2008 printserver

May 9th, 2013 by Jack Cobben No comments »

Ever noticed that on a 2008 print server you install a HP LaserJet 4xxx driver on it but when you open the properties page of the printer you still get the error that the driver wasn’t installed and if you want to install it? I’ve run into it while working on a Citrix Universal Print Server issue and a colleague pointed this out to me (thanks to Kristof Peeters).

Laserjet 4000 series not found » Read more: Error HP driver not found on 2008 printserver

Worker Group Membership Changes Prevent Users from Launching Applications

May 9th, 2013 by Jack Cobben No comments »

Here’s another issue I encountered during my work at Citrix which I wrote a KB article for.

The issue is when an application is assigned to a worker group and the membership is changed of that worker group the application launch fails.

Change Worker Group assignments

When an application is assigned to a worker group and the membership is changed of that worker group the following symptoms are visible:

  • Newly added servers to the Worker Group are not used for launching the application
  • The application fails to launch displaying the following error message to the user: Connection Error: You have not been granted access to this published application OK
  • Disabling and re-enabling all applications would fix the error.

Resolution

Install the hotfix in CTX135783 – Hotfix XA650R01W2K8R2X64052 – For Citrix XenApp 6.5 for Windows Server 2008 R2 – English to fix this error.

Original post on the Citrix knowledgebase.

Stopping PVS Stream Service can Render Target Devices Unresponsive

May 7th, 2013 by Jack Cobben No comments »

We as Citrites (Citrix employees) are encouraged to write KB articles for the Citrix knowledgebase (support.citrix.com). The following article I’ve written when I came across the issue and saw it wasn’t documented.

When stopping the Stream Service on a given Provisioning Server it can render some (but not all) target devices connected to that particular server unresponsive since the failover to other servers does not occur.

If you look at the stream process log (which can be found on the PVS server in C:\Programdata\Citrix\Provisioning Server\logs), you may find these entries: » Read more: Stopping PVS Stream Service can Render Target Devices Unresponsive