Author Archives: msandbu

Multiple vNet site-to-site configuration in Microsoft Azure

In many cases you would need to establish a site-2-site VPN connection between different subscribtions in Microsoft Azure, now this is a pretty simple process in Azure and can be easily done using the management portal.

Example: We have 2 vNETs configured in Microft Azure within the same region (Note that this does not consume bandwith cost, only gateway hours)


vNEt 1 (Test1) IP adsress subnet space and with a Gateway address of

vNet 2 (Test 2) IP address subnet space and with a Gateway address of

In order to setup a Site-to-site VPN connection I just need to define both of these as local networks as well to each other.

Local Networks:

Local vNet 1(Test1) IP address subnet space and with a Gateway address of

Local vNet 2(Test2) IP address subnet space and with a Gateway addres of

So in the management portal I can just define them as local networks to each other

vNet 2 –> Local vNet 1

vNet 1 –> Local vNet 2

and from there just add a same shared key and allow them to connect.

What if we want a third vNet to integrate with one of the other vNets using a Site-to-Site VPN? Is it possible ? Sure it is. With Microosft Azure it is possible to create up to 10 different VPN tunnels, problem is that the management portal only allows for one VPN tunnel at the time for one vNet. So we need to use PowerShell and a custom network xml file in order to finish the configuration here.

We need to create a new virtual entwork called vNet 3 (Test 3) IP address subnet space and with a Gateway address of (This also has to be created as a local network site as well in order to bind it up to another vNet.

In this examples we will bind vNet 3 to vNet 1, which already has an VPN tunnel activated for vNet 2.


First we need to download the vNet configuration XML, which can be done using the command

get-azurevnetconfig –exporttofile c:\folder\name.xml

Open it up and locate the virtualnetwork site for vNet1

    <VirtualNetworkSite name=»test» Location=»North Europe»>
        <Subnet name=»Subnet-1″>
        <Subnet name=»GatewaySubnet»>
        <DnsServerRef name=»″ />
          <LocalNetworkSiteRef name=»test2″>
            <Connection type=»IPsec» />
          <LocalNetworkSiteRef name=»test3″>
            <Connection type=»IPsec» />


Here is where we need to define our local network we which this vNet to connect to. For vNet 3 which does not have any VPN connection set up we can do this via the managmenet portal. or add a

          <LocalNetworkSiteRef name=»test1″>
            <Connection type=»IPsec» />

In the vnet xml file. After we are done adding the connection path to vNet we need to import the XML file to our azure subscribtion.

This can be done using the set-azurevnetconfig –configurationpath c:\folder\file.xml

After this is done we need to change the sharedkey so that the vNets have the same key.

Set-AzureVnetGatewayKey –VnetName test1 –Localnetworksitename test3 –SharedKey 12345QWERT

Set-AzureVnetGatewayKey –VnetName test3 –Localnetworksitename test1 –SharedKey 12345QWERT

After this is done the connections should be established. Note that if they don’t you need to go into the management portal, into vNet 3 and choose connect.

Then you can go into vNet 1 and see the connection is setup against two vNets.


Citrix Netscaler supported for Lync 2013


Microsoft just updated its support matrix for Lync 2013 (Finally) Where Netscaler is listed as supported for Reverse Proxy and for Load balancing –>

You can also read the deployment guide for Netscaler and Lync here –>

Upcoming speaking events

Alot is happening these days, and I am not standing still. So therefore I wanted to list my speaking events in the upcoming future.

Citrix User Group in Norway is having a boat-trip in the end of October –> (If you are working with Citrix this is an excellent oppurtunity to learn more)

Here I have two sessions (In norwegian)

  • Netscaler and Performance tuning
  • Netscaler and security features

Also I was confirmed as an speaker at next years NIC (Nordic Infrastructure Conference) haven’t gotten any confirmation regardiing what sessions yet, but it’s either Azure or 3D graphics!

  • Azure AD
  • Azure RemoteApp
  • 3d graphics

Citrix Netscaler and SSL3 “poodle” exploit

Earlier today, Google published a article regaring how hackers can exploit a vulnerability in the SSL 3.0 protocol. Which you can read more about here –>

You can also read more about the specific attack in detail here –>

Microsoft recommends that you disable SSL 3.0 using Group Policy on Windows Computer, since it is by default enabled, you can read more about it here –>

UPDATE::: Citrix has added a article on this exploit as well –>


Citrix Netscaler we can be fore flexible. For Netscaler Gateway we can define which type of SSL profiles or protocols which are going to be enabled for the session. We can create a new front-end SSL profile which we can attach to the Netscaler Gateway. Front end policies are used when a client is connecting to a vServer


Here I define that TLSv1 is enabled, and that the client cannot use SSLv3. (This is a screenshot from a VPX) and therefore TLSv1.1 and 1.2 cannot be enabled for this profile, and by default Citrix Receiver only supports TLS1 not the newer versions.

After I created the protocol I can bind it to a Gateway vServer


Now If I have other load balanced vServer I can also disable SSL for these vServers, but it is important to check if the clients that are connecting actually support TLS.

NOTE: I have not verified that this works for most browsers but I verified that my client can connect to the gateway vServer using TLS and not SSL3.

Netscaler Gateway and content switching

today is the day! Citrix annonced earlier today a new enhacement release for Netscaler Gateway which allows us to use Netscaler Gateway together with Content Switching.

This means that we can have a Gateway vServer together with content switching policy. So when we create a Netscaler gateway together with content switching we need to define content switching policies. For instance if we have the vServer gateway and we have two content switching policies for the URLS /zm/ and /xm/ will point to a load balanced vServer. Others urls which are not being catched by a content switching policy will be redirected to the Gateway vServer.

So the content switching rules are checked first, before it goes on with session policies for the gateway vServer.

Now another thing that is cool with this release is that it supports SSO to RD solutions.

So this is the new screen when we create a new vServer.


We have the RDP info setup directly here. And we can also define CS policy bindings. So I can add a new content switching policy and add it to the vServer


And as I mentioned these rules will be evaluated before session policies.

But note that this is an enhacement build, and should/can be used for testing you can read more about the e versions here –>

You can download the new build from citrix downloads here —>

Software defined Storage? Dell’s got you covered

Earlier I’ve discucced a bit on Software defined storage and how this is an growing market with new vendors appearing all the time. Some of the concept behind SDS is the ability to move features that have previously only been available to the hardware solutions into the software stack.

Now as I mentioned there are a lot of different vendors here, some focus on delivering high performance, some on delivering adequate I/O on commodity hardware, some on flexibility, and many in between.

So what do we choose ? Since there are so many different vendors here it might be a hard choice to choose one over the other. The big question is what do I need ? Do I need to run big OLTP databases running on an average 200,000 IOPS, do I need to have a hyper-v cluster setup using commodity hardware in order to have a low cost on my Storage? Do I have existing Vmware infrastructure that I want to improve my IOPS on ? Looking to buy new hardware to have next generation VDI platform ? Do I have a bunch of different backend NAS / DAS and SAN I want to pool into a large unit of storage?

So the question is what do I have, what do I want and where do I need to go

And as the title mentiones, when you are looking for a new solution/ platform for software-defined storage, well then Dell’s got you covered.

Dell is one of the few hardware vendors who is certified for most of the different SDS solutions such as.


Storage Spaces:


Dell also has a strategic partnership with Nutanix (which is going to be Dell hardware shipping with Nutanix Software) called the XC-series

Also Dell has partnership with both Nexenta and Atlantis

Dell has also included a partnership with SanDisk in 13th generation servers which allows for simple SSD tiering on servers –>

So Dell has many different SDS options on their solutions, and also their SC-series, Equallogic, Compellent for running traditional workloads.

Veeam Endpoint backup free

Today at the VeeamON conference, they announced a new tool called Veeam Endpoint Backup free. This tool which will ship H1 next year Allows us to take backup of physical servers, computers, laptops and such.

It can integrate with existing Veeam repositories or to a NAS share. The best part it of course that it is going to be free! Smilefjes

Stay tuned as the preview comes later in November, but this allows us to lastly do backup av Physical servers in a Veeam enviroment without the need to buy more licenses.

Netscaler masterclass presentation Oktober 2014

Today I presented on the Netscaler masterclass on the subject,  System Center and Netscaler and here is my presentation –>

My talk consisted about using the different integrations between System Center and Netscaler, primarly on

* Virtual Machine Manager and Netscaler (Using the load balancer extention to deploy load balancing rules for service templates)
* Operations Manager and Netscaler (How to setup monitoring for Netscaler and use it together with Distributed Applications)
* Orchestrator and Netscaler (How to setup automation tasks against Netsacler using the NITRO SDK)

And as promised in the presentation here is my scripts that I use for the different tasks.


Add-Server activity (Note that this requires that the SDK is added to C:\SDK folder and that the different DLL files are added to the global assembly cache.

Set-location «c:\sdk»
[System.Reflection.Assembly]::Load(«System.EnterpriseServices, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a»)
$publish = New-Object System.EnterpriseServices.Internal.Publish

(ADD THE DLL files to the global assembly for Orcehstrator to use for reference)



$path1 = Resolve-Path «C:\sdk\lib\Newtonsoft.Json.dll»
$path = Resolve-Path «C:\sdk\lib\nitro.dll»

$user = «»
$pass = «»
$nsip = «»


$nitrosession = new-object com.citrix.netscaler.nitro.service.nitro_service($nsip,”http”)
$session = $nitrosession.login($user,$pass)

$server1 = New-Object com.citrix.netscaler.nitro.resource.config.basic.server
$ = «»
$server1.ipaddress = «»


$service1 = New-Object com.citrix.netscaler.nitro.resource.config.basic.service
$ = «»
$service1.servicetype = «»
$service1.monitor_name_svc = «»
$service1.port= «»
$service1.servername= «»

Create Load balanced Service

$nitrosession = new-object com.citrix.netscaler.nitro.service.nitro_service($nsip,”http”)
$session = $nitrosession.login($user,$pass)

$lbvserver1 = New-Object

$lb_to_service = New-object
$ = «»
$lb_to_service.servicename = «»

MVP another year for Enterprise Client Management

I received an email today, saying that I am MVP for another year. I am honored since this represents many of the elite it-pros all around the world

Also on the same day, Microsoft released vNext previews of Windows Server and System Center also Windows 10. Alot of documentation has been released, but remember its a preview (alpha or beta stage)

But it can be downloaded from MSDN for those who have access there, I will add another blogpost when I have more information about the different releases.

Using Netscaler Application firewall to protect against ShellShock

With the recent announcement of the ShellShock vulnerability many vendors have done a great job with coming with patching / fixes to close the vulnerability. Citrix has released an knowledge article which shows what Citrix products are affected here –>

But! Citrix has also released an update to AppFirewall signature to include fixes to services which are exposed via Netscaler. For instance if we have an load balanced service which is load balanced via Netscaler, and the services running in the back are affected or vulnerable we can use AppFirewall to protect them from the attack.

First we need to update the signature files (Citrix released an update yesterday) (Update version)

Then we can see that the new signature files include fixes for shellshock.


The actions are by default set to block. So when creating an appfirewall policy we can bind this to an particular vServer or URL.


Important to set signature action to block



But note that these rules only apply to services that are exposed via the Netscaler, and not the netscaler itself. Refer to the document which is posted above.


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