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VPN for Connectivity:A VPN (Virtual Private Network) allows secure connectivity between the on-premises datacenter and Azure over the public internet without requiring dedicated infrastructure.

Ease of Setup:VPNs are typically easier and quicker to set up compared to dedicated connections like ExpressRoute, making them suitable for organizations without existing dedicated connection infrastructure.

References:

Azure VPN Gateway Documentation

Nutanix NC2 Connectivity Guide

NATed Path Configuration: When using the NATed Path, it is essential to ensure that traffic can flow out of the Flow gateway VM to external networks.

Default Route: Adding a default route on the Nutanix User VPC ensures that all outbound traffic is directed to the appropriate network gateway.

Configuration Steps:

Navigate to the routing settings of the Nutanix User VPC.

Add a default route with the destination of 0.0.0.0/0, pointing to the External Overlay network.

Security Group Settings:

Ensure that the External Flow Gateway Security Group on the External NIC allows outbound traffic.

Ensure that the Internal Flow Gateway Security Group on the internal NIC allows outbound traffic (if needed for internal network flows).

Conclusion: Properly configuring the default route on the Nutanix User VPC enables outbound traffic flow via the NATed Path through the External Overlay network.

References:

Nutanix Flow Gateway Configuration Guide

Azure VPC Routing Documentation