Archives For Networking

Getting Around Blocked Ports

Regularly, I find myself in a location that blocks ports to the outside world. In many of those moments, I can’t use Remote Desktop (RDP) sessions to connect to Virtual Machines hosted on Azure. The strategy expressed in this post is one of many possible solutions that also applies to Linux and SSH sessions.

The Strategy

  • Using a Load Balancer and NAT rules to map port 443 to the RDP (3389) port for a Jumpbox Virtual Machine (VM)
  • Using the Jumpbox to RDP into VMs deployed to the Azure Virtual Network.
    Continue Reading…

Using ARM to Deploy Global Solutions

Imagine deploying your secure load balanced solution to three datacenters, putting in place a worldwide load balancer and doing so in roughly 24 minutes. Did I mention that this deployment is predictable and repeatable?

Good, now that I’ve got your attention, it’s time to dive in!

Building on my previous post about managing compute resources on Azure I decided to modify the Azure Resource Manager(ARM) template to deploy a real-world environment to three datacenters (Yes I know, the diagrams shows two locations, but as I built the demo, I got greedy…). Using Azure Traffic Manager we are able positively affect a users experience by directing them to the closest datacenter.

Its important to note that ARM does not support nested copy operation. This means that we have to use a different strategy to deploy identical environments in multiple Azure regions. After a bit of research it became apparent that I had to use nested deployments. This technique requires us to break our template into multiple files. The parent template in this demo is the azuredeploy-multi-geo.json file. It contains the full list of parameters, a nested deployment that deploys instances of our environment to multiple Azure regions, and a Traffic Manager definition. The azuredeploy.json template file was refactored from the template used in my previous blog post. It contains networking, storage and Virtual Machine definitions. Continue Reading…

Azure PowerShell Version 1.0 has great benefits, and also has many breaking changes. Since I wrote about moving my DNS to Azure, things have evolved. This is a post about updating an IPV4 on a Naked Domain type A RecordSet.

Most of breaking changes are minor. If your script leveraged Azure Resource Manager (ARM), start by replacing ‘-Azure‘ with ‘-AzureRm‘. This change was made because the Switch-AzureMode CmdLet was removed. Continue Reading…

Lost in Translation – Azure Networking

In today’s highly connected world, many professionals use Cisco’s terminology to discuss networking. Using the wrong terms can lead to lengthy, confusing arguments. The goal of this post, is to help those of us who don’t speak the language, to communicate effectively with others about Azure Networking.

I’ve been dabbling in the IT Pro space for a few months now, and it’s been a challenge to discuss Azure Networking. Coming from a development background, my reference to networking was Azure. That definitely made it difficult, because I spoke about Virtual Networks, Subnets and Network Security Groups. To help me sort things out, I asked a colleague of mine to identify the equivalencies between Cisco and Azure Networking terminology.

Let’s dive in! Continue Reading…

25/03/2016 – Updated with Resource Manager CMDLETs

Moving to Azure DNS

In preparation for my next blog post, I decided to move the domain name server (DNS) records for to the Microsoft Azure DNS.


Over the years, I’ve been very happy with the DNS services that I’ve used to host my DNS Records. Since, I rarely needed to log into these services, I’ve come accustomed to resetting my credentials. A recent need to make changes to these DNS Records, has pushed me to think about ways to streamline this process.

Along the way, I realized that there’s just something very appealing about centralizing everything to my Microsoft Azure environments. From compute to storage to networking, being capable of manipulating everything through PowerShell has turned out to be useful. The idea of being able to manipulate my DNS Records from this same environment felt like the right thing to do. Plus you get the added benefit of performance and availability. Continue Reading…

Finding an Invisible NAS on a Network

Over the weekend I decided to migrate data from an older NAS (Network Attached Storage) device to a newer device. So I plugged in the new NAS and set it up with two brand new HDDs. Provisioned a RAID 1 (Mirror) and finally I secured the device with a better password than “blank“.

Plugging in the older device, I expected that it would show up in Windows Explorer, but it did not. I spent the next couple hours trying to figure out why I could not find the device’s IP. I connected to my router, looked at the DHCP map and it wasn’t showing up.

Obviously, I hadn’t used the device for some time and had forgotten the devices name. So here I was, with no IP or Name for the device. The RJ45 plugged in and the flashing lights telling me that something was going on… Continue Reading…