Tag: network security group

NSG: any protocol, specific port?

by erjosito

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?

Deploy (Azure) Network-as-Code as a champ

by erjosito

Virtually every expert out there recommends following an Infrastructure-as-Code approach to manage Azure Networks, and even more so when dealing with traffic segmentation features such as firewall rulesets and network security groups (those tend to change more frequently than other resources). And yet, there is surprisingly little guidance on how to do so, and about … Continue reading Deploy (Azure) Network-as-Code as a champ

Azure Traffic Analytics and Breach Detection

by erjosito

Azure Traffic Analytics and NSG flow logs are one of Azure’s best kept secrets. In short, you can log every single network flow going through your Network Security Groups (NSGs), including the number of packets and its ingress/egress bandwidth. Traffic Analytics already makes a great job at showing interesting stuff: the scenarios documented in the … Continue reading Azure Traffic Analytics and Breach Detection