VNet Flow Logs recipes

You might have heard about the General Availability of Virtual Network Flow Logs in Azure, and even read the announcement blog post. When writing that post with Harsha CS I had the chance to play a bit with VNet Flow Logs and Traffic Analytics, and I would like to share some of the learnings. What … Continue reading VNet Flow Logs recipes

Azure network monitoring with synthetic traffic

Wow, that was a mouthful. But it describes what I would like to discuss in this post. Networks are at the basis of every IT infrastructure, so when they don’t work, everybody notices (and when they do work, nobody notices). Hence, monitoring computer networks to detect and fix problems as quickly as possible is a … Continue reading Azure network monitoring with synthetic traffic

Monitoring Azure Networks with Alerts

Monitoring is one of those underrated disciplines: everybody tells you to do it, but nobody tells you exactly how. As a consequence, there are many different approaches and few concrete recommendations. Before continuing, a word of caution: I am not going to cover introductory topics in this post. If you are not familiar with Virtual … Continue reading Monitoring Azure Networks with Alerts

Combining Azure Firewall and Flow Log analysis

As you might already know, there are a couple of ways of filtering traffic in Azure Virtual Networks: Network Security Groups (NSGs) and Azure Firewall. NSGs offer unlimited performance for Layer 4 filtering, while Azure Firewall is more powerful with features like deep packet inspection or application-level intelligence. However, even if these solutions follow a … Continue reading Combining Azure Firewall and Flow Log analysis