Network Security Groups in Azure — The Fundamentals , Which Direction to Apply Rules, What would source and target ports be, Does return reply traffic need to be explicitly permitted(1/3) ?

Can I have multiple Network Security Groups per NIC/subnet?

No,It is not possible to have multiple NSGs linked to a single object.

NSGs(Network Security Groups) are used to filter network traffic to and from Azure resources
INBOUND rules in NSG
OUTBOUND rules in NSG
NSG Rules are evaluated by priority,using the 5 tuple information
NSG Inbound and Outbound Rules
Complete Details on a NSG Rule
Illustration - NSG Evaluation
NSGs and Outbound Traffic from a VM - NIC and Subnet Levels
NSGs and Inbound Traffic to VM - Subnet and NIC Levels
NSG Constraints
NSG — Communication between Subnets in same VNET is allowed by default

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Aditya Garg

Aditya Garg

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Cloud Consultant |Zumba Enthusiast | Seaside Lover | 2XAzure, 1XAWS, 1XCCNP, 1XCCNA