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Microsoft Azure Security by Roberto Freato

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Virtual Networks

The first thing to ask about VNets is: do we need a VNet? VNet is a service used to build a private network into the Azure Cloud to perform the following:

  • Extend the security boundary of Cloud Services and VMs: several Cloud Services and VMs can be placed in a single VNet to let them communicate without passing from the Internet publically
  • Set up a Hybrid solution: If we need to connect an existing on-premise infrastructure to Azure, VNet is the starting point

These two reasons (though they are not the only ones) are consistent with the two modes of how VNet can be deployed:

  • Cloud-only VNet: This is the choice to enable the first scenario
  • Cross-premises VNet: This is the choice that offers much more flexibility

From the security perspective, ...

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