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[Citrix] XenServer 7.0 released

May 27th, 2016 No comments

XenServer 7 was released in May of 2016.  It was available in pre-release form under the project name of Dundee.  All new XenServer installations should be made using XenServer 7.

Microsoft Technology integration

Citrix has a long history of integrating with, and supporting Microsoft operating systems and infrastructure products, and XenServer 7 is no exception.

  • Automated Microsoft Windows VM driver management
    Do you administer a larger XenServer environment? We currently support up to 1000 VMs per host, and have customers running thousands of hosts, so when time comes to updating the Windows VMs’ XenTools, it can be quite a challenge. Even with smaller infrastructures, the process of updating many Windows VMs can be a headache, something we’ve heard loud and clear from our customers. Our solution? Automation.
    In XenServer 7, it is now possible to let Microsoft Update Services automatically install and/or update the Windows VM I/O drivers contained within those VMs, moving this once cumbersome process into the standard organizational framework for how their Windows machines are updated.
  • Microsoft Server Message Block (SMB) support
    Adding to the wide variety of host storage connectivity, XenServer 7 now includes SMB to enable IT admins to use Windows storage devices running SMB for their XenServer VM’s disks.
  • Docker containers in Windows Server 2016
    In May 2015, XenServer introduced Docker container management for Linux VMs, opening up visibility and management to IT admins, of the containers being used within their XenServer infrastructures. This year for XenServer 7, we are really excited to be supporting Docker containers on Microsoft Windows Server 2016 OS, rounding off our of Docker support across both Linux and Windows, the first and only commercial hypervisor to do so.
  • A new Microsoft System Center Operations Manager (SCOM) management pack is now integrated and licensed in XenServer 7. For customers wanting greater Microsoft SCOM management visibility, this ties in well across the Citrix stack.
  • The Microsoft Active Directory integration within XenServer has been improved, changing the underlying connectivity components, which increases the scalability to support large AD forests, whilst also increasing performance.
  • XenServer 7 includes templates for Microsoft Windows 10 and preview of Windows Server 2016.

Revolutionary Security

Infrastructure security is always a challenge, and whether it’s protection from viruses, malware or hackers, there are a variety of tools and methods used by security vendors to help businesses protect their IT infrastructures from the variety of tools and methods used by the people with malicious intent. A big challenge is how malware and hackers get around, disable, or hide themselves from existing security solutions.

If someone can leverage a software vulnerability to gain access to a system, they tend to work their way up the security chain, seeking to get the highest level of system privileges from where they can disable security software and do the most damage or gain access to the most sensitive data.

XenServer 7 is different.

Working closely with Bitdefender, Citrix is proud to announce XenServer Direct Inspect APIs, which allow integration from third party security software companies to leverage hypervisor memory introspection (HVMI). This uses a privileged security appliance (SVA), one per-host to inspect the memory of VMs running on the host. As introspection is happening from outside the guest VM, there are no agents required within the VMs, and as such, nothing for a virus, piece of malware or hacker to disable within the VM. Should anyone also hack into a VM OS, they would also only be able to see within the boundaries of that VM container, and be completely unaware that a host-based SVA could be monitoring and blocking their activity; we call this “better than physical” protection.

diagram-6

Security products based on virus or malware signatures protect you from known risks, however what about day-zero attacks? How do you protect yourself against something for which there is no known signature? Bitdefender’s integration goes beyond the standard signature checking, by examining the techniques used by viruses or malware rather than their signatures, enabling protection of systems against day-zero attacks.

This solution isn’t targeted at replacing all disk based scanning protection, as the Direct Inspect APIs feature is a memory based solution, yet it extends protection through either a kernel-mode or user-mode (for specific applications), providing protection against a variety of security threats, including existing security products from being disabled. As such it complements existing disk based protection solutions. Find out more from Bitdefender on this blog and data sheet.

Some papers:

More information: Citrix

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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VMware: After applying patches from ESXi Update2-Rollup ISO, Citrix NetScaler virtual machine with e1000 vNIC loses network connectivity (2092809)

November 4th, 2014 1 comment
  • Some Citrix NetScaler virtual machine appliance running the guest Operating System with e1000 vNIC driver loses network connectivity
  • And also cannot access the console after applying the patches released with ESXi 5.5 Update 2 build 2143827

This issue occurs when the NetScaler virtual machine driver resets TDT to 0 after 511 while the TX ring size is shown as 1024.

 

Workaround:

This is a known issue affecting Citrix NetScaler virtual machine appliance running on ESXi 5.5 Update 2 build 2143827.

Currently, there is no resolution.

To work around this issue, add the line hw.em.txd=512 in loader.conf file.

To add the line hw.em.txd=512 in loader.conf file:

  1. Log in to the Citrix NetScaler virtual machine appliance as root
  2. Locate the loader.conf file on the Netscaler virtual machine appliance by running this command:
    find / -name loader.conf
    Note: There are two loader.conf files. The two files are ./flash/boot/defaults/loader.conf and ./flash/boot/loader.conf. Modify the first one and ensure to take a backup of the file prior to making the changes.
  3. Add this line in the loader.conf file
    hw.em.txd=512
  4. Save the changes
  5. Restart the NetScaler virtual machine appliance
    More information:

VMware & Citrix

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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Citrix: Using the default VMware vCenter server certificate in XenDesktop – Hosting

October 10th, 2014 1 comment

When integrating XenDesktop with vSphere or vCenter respectively, you might encounter the following error message:

„Cannot connect to the vCenter server due to a certificate error. Make sure that the appropriate certificates are installed on the vCenter server, and install the appropriate certificates on the same machine that contains all instances of the host service.“

image

 

Solution:

1. Connect to your vCenter server and browse to „C:\ProgramData\VMware\VMware VirtualCenter\SSL“

2. Copy the cacert.pem file to your XenDesktop Broker (to the C:\Temp directory for example)

3. Open a Microsoft Management Console (by running the mmc.exe command) as an Administrator

4. Add the Certificates Snap-In and select to manage certificates for the local computer account.

5. Browse to „Trusted Root Certification Authorities“ and select Import

image

6. Import the cacert.pem file. (You need to select „All Files“ from the dropdown menu in the lower right hand corner, to be able to see it)

7. Now you should be able to see the vCenter certificate in the list of trusted certificates and XenDesktop should connect to vCenter without any error message.

 

Result:

image  image 

More info: Citrix

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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Powerfuse: Directly open a file from the start menu

October 22nd, 2009 No comments

When using citrix streamed applications and res powerfuse you can walk into the following problem.

If you want to open a (for example) mdb file direcly from the start menu you can’t just open the mdb file because the file extension is connected to windows explorer.

You can open the by opening the streamed app and add a extra command into the link: /extracmdline:”location”

An example:

c:\program files\Citrix\Streaming Client\RadeRun.exe -D /app:”Microsoft Office Access 2003″ /package:”\\fs1\apps\Microsoft Office 2003\Microsoft Office 2003.profile” /extracmdline:”C:\files\example.mdb”

Microsoft: Windows 2008 Citrix XenApp 5.0 Client Time Zone won’t redirect

October 5th, 2009 1 comment

Installed this hotfix:

Hotfix XAE500W2K8030 – For Citrix XenApp 5.0 for Windows Server 2008 x86
http://support.citrix.com/article/CTX122563

Set the following policy’s:

Citrix Policy’s: Default Policy – User Workspace – Time Zones – Do not estimate local time: Enabled
Citrix Policy’s: Default Policy – User Workspace – Time Zones – Do not use Clients’ local time: Disabled

Local policy: Computer Configuration > Policies > Administrative Templates >Windows Components > Terminal Services > Terminal Server > Device and Resource Redirection > Allow time zone redirection: Enabled

 

I rebooted the Citrix servers and the Client Time Zone is active for the Citrix users.

 

Check also: Citrix KB

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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Categories: Citrix, Microsoft Tags: , , ,

Citrix: Citrix Print Management Service is missing

September 23rd, 2009 No comments

I was called yesterday that local printers and some network printers arn’t mapped in a user Citrix session. Normally you can choose and test with restarting from the Windows Print Spooler en Citrix Print Management Service but… there was no Citrix Print Management Service.

With CtxCpsvc10.exe you can Uninstall, Install the Citrix Print Management service and you can recreate the ctx_cpsvcuser user with the correct startup credentials in the service.

 

In my case I used: cpsvc.exe –install to install the Citrix Printer Service

Result: Citrix Printer Service installed.

  Read more…

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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Microsoft: Running Citrix Webinterface 5.1 on Windows 2003 64-bit

August 23rd, 2009 No comments

After installing Citrix Webinterface 5.1 on my Windows 2003 R2 SP2 64-bit VM i get the following error:

ISAPI Filter ‘C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_filter.dll’ could not be loaded due to a configuration problem. The current configuration only supports loading images built for a AMD64 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see http://go.microsoft.com/fwlink/?LinkId=29349.

To resolve this error you must prepare your IIS and ASP.NET 2.0 to an 64-bit application.

ASP.NET 2.0, 64-bit version

 

To run the 64-bit version of ASP.NET 2.0, follow these steps:

  1. Click Start, click Run, type cmd, and then click OK.
  2. Type the following command to disable the 32-bit mode:

    cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 0

  3. Type the following command to install the version of ASP.NET 2.0 and to install the script maps at the IIS root and under:

    %SYSTEMROOT%\Microsoft.NET\Framework64\v2.0.50727\aspnet_regiis.exe -i

  4. Make sure that the status of ASP.NET version 2.0.50727 is set to Allowed in the Web service extension list in Internet Information Services Manager
    Result:

Enable32bitAppOnWin64           : (BOOLEAN) False

Finished installing ASP.NET (2.0.50727).

 

And my Citrix Webinterface is working:

image

Source: Microsoft

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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Citrix: Disable Macromedia Flash objects

May 8th, 2009 No comments

Performance technisch kan je er voor kiezen om Macromedia Flash te disablen op een Citrix omgeving. Dit kan op Farm niveau worden uitgeschakeld:

image

Daarnaast kan er worden gekozen om dit uit te schakelen in het register. Deze sleutel zorgt er ook voor dat er geen popups verschijnen indien er een Flash animatie gestart wilt worden of een Active X applicatie geinstalleerd moet worden.

Open binnen het register het volgende path:

HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\ActiveX Compatibility\{D27CDB6E-AE6D-11CF-96B8-444553540000}

Maak een DWORD aan genaamd “Compatibility Flags” met waarde: 0×00000400 (1024 in decimal)

Zie als voorbeeld:

image

Meer informatie: CTX110407

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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Categories: Citrix, Microsoft Tags: , ,

VMware: Terminal server performance tuning on VMware ESX

May 5th, 2009 No comments

Er zijn nogal wat problemen omtrent Windows Terminal Servers/Citrix op VMware ESX servers. Wat zijn nou de beste instellingen om performance te waarborgen.

Om dit allemaal uit te zoeken ben ik bezig geweest bij een klant die performance problemen ervaren. Deze klant heeft meerdere ESX hosts, een host heb ik gepakt om bezig te gaan met de performance problemen. De host en VM’s hebben de volgende specificaties:

ESX Host Configuratie:

Model: HP ProLiant DL380 G5

Processors: 8 CPU x 1,999 Ghz

Processor Type: Intel® Xeon® CPU  E5335 @ 2.00 Ghz

Number of NICs: 6

OS: VMware ESX 3.5 u4

vSwitch Configuratie:

vSwitch 1:
Read more…

sanderdaems

Sander Daems is founder and author of this blog and working as a Sr. Infrastructure Consultant by IT-Value. Sander has over 10 years experience in IT, primary focus: virtualization, storage and SBC

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