How do Network Security Groups (NSGs) interact with traffic between peered VNets, specifically with regards to ingress and egress control? What would happen if NSGs block inbound traffic from a peered VNet?

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Thamimul ansari · Accepted Answer

NSGs filter network traffic between peered VNets using inbound and outbound rules based on the source and destination IP addresses, ports, and protocols. By default, a built-in rule with the "VirtualNetwork" service tag allows all traffic between peered VNets. You can override this default rule with custom, higher-priority rules to deny or allow specific traffic.

How do Network Security Groups (NSGs) interact with traffic between peered VNets, specifically with regards to ingress and egress control? What would happen if NSGs block inbound traffic from a peered VNet?

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