Thoughts from the clouds
Welcome to the third post in the Private Link Reality Bites series! Before we begin, let me recap the existing episodes of the series: Big shoutout here to my esteemed colleague and oracle for Azure Networking Daniel Mauser. If you don’t know his GitHub site, make sure you check it out! Thanks as well to … Continue reading Private Link reality bites: what’s my source IP?
Welcome to the second post in the Private Link Reality Bites series! Before we begin, let me recap the existing episodes of the series: In this post I am going to explore something that silently has started to work in a different way as it used to: routing in the GatewaySubnet, or how to send … Continue reading Private Link reality bites – Your routes might be lying
Welcome to this new series of blog posts in which I will be explaining some not-so-well-known facts about Azure Private Link and some associated technologies! This idea is born from the fact that I have been helping some colleagues and customers lately with some questions around Private Link, and that has made me realize that … Continue reading Private Link reality bites – Private endpoints are an illusion
In Azure you have two main ways of managing your virtual network connectivity: self-managed hub-and-spoke and Virtual WAN. Virtual WAN is a solution where Microsoft manages part of your virtual networks for you, and in exchange it gives you some benefits such as any-to-any routing out of the box. However, what if you need that … Continue reading Interregional traffic in hub-and-spoke
This one is going to be quick. The question is the following: if you have an Network Security Group rule in Azure that matches any protocol, but a specific TCP or UDP port number, what is the effect? Would protocols such as ICMP be matched as well? To verify this I have this NSG: If … Continue reading NSG: any protocol, specific port?
The square design in ExpressRoute is not a recommended practice, but it can mean savings in ExpressRoute costs of up to 90%.
First of all, my apologies for the radio silence, there have been some private projects going on during the Summer months that have kept me away from blogging. With that out of the way: what the heck is subnet peering? You probably know VNet peering, but is “subnet peering” now a thing? Well, not yet, … Continue reading Azure Subnet Peering
I have recently expanded my SDWAN in hub-and-spoke networks design guide to include SDWAN-to-firewall routing. Initially I didn’t have this point, but recent conversations have made me realize that not everybody understand this. The main difficulty in this topic is related to the fact that you cannot inspect the effective routes of your Virtual Network … Continue reading Do not let ExpressRoute, VPN and SDWAN traffic bypass your firewall
Azure PaaS service networking is quite a complex landscape to navigate. Documentation in Azure about this topic is located in different areas (under Networking and each specific PaaS service), and sometimes using inconsistent terminology. My goal in this blog post is setting a classification of PaaS services that can be used to navigate this complexity. … Continue reading Taxonomy of Azure PaaS service access
Designing network connectivity in public cloud can very quickly become a daunting task. Of course, public cloud providers do offer native networking services, and with those it is fairly easy. This should always be your primary route (pun intended). For example, in the case of Azure, using Virtual WAN and its native integration with both … Continue reading Designing your SDWAN and Firewall into Azure Hub and Spoke
Cloudtrooper 