Azure network security

Azure network security is based on classic network security. Just because the hardware underneath is managed and the whole networking is virtualized doesn't mean that all classic network security principles are invalid.

Network security groups

A very basic feature when it comes to network security in Azure is the network security groups. It would be too much to call them firewalls, but they fulfill basic firewall activity. They are best compared to access lists on a Layer 3 network switch. They consist of inbound and outbound network security rules. These rules control the network traffic flow and can be given several parameters at creation.

Priority

The Priority of a rule defines the order in which the rules are applied to traffic. The rules are processed in order, what means that a lower number means a higher priority.

Source

There are a few different setting for source traffic. The source traffic needs to be categorized first. An important setting is the Tag categorization...