Can you configure network security group (NSG) rules to check TCP, UDP, or ICMP network protocol types?

Network Security Groups (NSGs) in Microsoft Azure are indeed capable of checking various network protocol types, including TCP, UDP, and ICMP. This functionality is essential for controlling inbound and outbound traffic to network interfaces, VMs, and subnets in Azure.

By defining specific rules in an NSG, you can allow or deny traffic based on the protocol type specified. For instance, you can create rules that apply to both TCP and UDP, which are commonly used for application data transmission, as well as ICMP, which is primarily used for diagnostic purposes like pinging to check the status of network connectivity. The versatility of NSGs in handling multiple protocol types allows for finely-tuned security postures tailored to the unique requirements of applications and services running in the Azure environment.

This capability ensures you can effectively secure your network by implementing a robust set of rules based on the specific requirements of the traffic that your applications need to handle.