IaaSAntimalware Extension Status NotReady if Installed with no Configuration

The Microsoft Antimalware extension (IaaSAntimalware) requires a minimum configuration when installed, otherwise its status will be NotReady. When you add the IaaSAntimalware extension using the Azure management portal, that minimum configuration is included by default, but when you add the extension using PowerShell, you must remember to include it. You can view extension status in…

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Azure VM may fail to activate over ExpressRoute

Customers can advertise a default route (also known as forced tunneling) over their ExpressRoute circuit to force all traffic destined for the internet destined traffic to be routed through their on-premises infrastructure and out their on-premises edge devices. This enables you to leverage your existing on-premises investments such as security appliances or WAN accelerators to manage…


Azure SNAT

  This post was contributed by Pedro Perez. Azure’s network infrastructure is quite different than your usual on-premises network as there are different layers of software abstraction that work behind the curtains. I would like to talk today about one of these layers and why you may want to take it into account when troubleshooting…

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Supported IP Protocols for Azure Cloud Services

As of today, June 2015, the supported IP protocols for Azure cloud services are TCP (protocol number 6) and UDP (protocol number 17) only.  All TCP and UDP ports are supported.  This applies to both cloud service VIPs as well as instance level public IPs.  Additional IP protocols may work in some scenarios (for example…


Building Windows Server Failover Cluster on Azure IAAS VM – Part 2 (Network)

Hello, cluster fans! In my previous blog, Part 1, I talked about how to work around the storage blocker in order to implement Windows Server Failover Cluster on Azure IAAS VM. Now let’s discuss another important part – Network in cluster on Azure. Before that, you should know some basic concepts of Azure networking. Here…

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Windows Server Failover Cluster on Azure IAAS VM – Part 1 (Storage)

Hello, cluster fans. This is Mario Liu and I am a Support Escalation Engineer on the Windows High Availability team in Microsoft CSS Americas. I have a good news for you that starting in April 2015, Microsoft will support Windows Server Failover Cluster (WSFC) on Azure IAAS Virtual Machines. Here is the supportability announcement for…

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Use Azure custom routes to enable KMS activation with forced tunneling

If customers enable forced tunneling on their subnets to force internet connectivity via on premises equipment, OS activations prior to Windows Server 2012 R2 fail as it does not connect to the Azure KMS server from their cloud service VIP.  However, thanks to the newly released Azure custom route feature this is no longer the…


Azure DNS Server Redundancy

Customers may observe that their PaaS role instances and IaaS virtual machines are only issued one DNS server IP address by DHCP.  This does not mean that name resolution in Azure has a single point of failure however. The Azure DNS infrastructure is highly redundant.  The IP address that is exposed to the customer virtual…


What is the IP address 168.63.129.16?

The IP address 168.63.129.16 is a virtual public IP address that is used to facilitate a communication channel to internal platform resources for the bring-your-own IP Virtual Network scenario.  Because the Azure platform allow customers to define any private or customer address space, this resource must be a unique public IP address.  It cannot be…


Keeping Azure PowerShell Current

I have been supporting Azure for 7 years now and one of the constants is the rapid pace of change of the services offered. This means that not only do you have to continually stay abreast of the most recent changes, but you also have to make sure that your tools stay updated, too. The…

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