An Azure virtual network (VNet) provides a private address space and routing boundary for resources in an Azure region. Configuring one well involves more than clicking Create: the address plan must coexist with other networks, subnets must reflect operational and security boundaries, and connectivity must be tested under the policies that will run in production.<\/p>\n
This walkthrough focuses on a manageable Azure VNet deployment rather than switching between VMware workstation networks and several unrelated virtualization products. The example uses a web tier, an application tier and a separate hub VNet. It is a design exercise: replace example addresses and names with values approved by your organization’s network owners before deployment.<\/p>\n
Assume the application VNet is named Do not choose a prefix solely because it looks private. Compare planned addresses against on-premises networks, existing VNets, VPN and ExpressRoute prefixes, and future peering relationships. Overlapping IP spaces complicate or block direct peering and routing. Subnet boundaries should reflect access and operations rather than assume that each team needs an entirely separate \/16.<\/p>\n The starting point is a credible IPv4 subnetting<\/a> plan. Understand how a \/24 differs from a \/16, what Azure reserves within subnets and how many usable addresses are required by autoscaling, private endpoints and service integrations.<\/p>\n In the Azure portal, select the intended subscription and create a resource group in the supported region. In Virtual networks, select Create and assign the approved subscription, resource group, name and region. Configure address space Create the web subnet Review the configuration before deployment. Azure creates and updates network resources under the permissions of your current account, so production work should use approved roles and change control. Record the address plan and expected connections in a version-controlled architecture description rather than only in a screenshot.<\/p>\n An Azure network security group (NSG) filters traffic through prioritized allow and deny rules and includes default rules. Associating an NSG with a subnet or network interface changes the effective policy at that point. The Azure network security group configuration<\/a> should be driven by an application traffic matrix, not an indiscriminate ‘allow all internal’ policy.<\/p>\n For an example web application, permit inbound HTTPS to the appropriate web entry point, allow the minimum required web-to-application communication and restrict management paths. Do not expose database or remote management ports to the public internet to make initial testing easier. Where the architecture uses a load balancer, Application Gateway or private frontend, adapt rule sources and destinations accordingly.<\/p>\n Document which flows are explicitly allowed and which are denied. NSG rules are stateful, but routing, firewalls, platform service behavior and user-defined routes may also affect communication. A rule that looks correct when viewed alone is not proof that a packet can complete its journey.<\/p>\n Azure-provided DNS may meet simple internal requirements. Hybrid environments often need custom DNS servers, Azure DNS Private Resolver or carefully configured forwarding to resolve on-premises names and private endpoint zones. Decide how a workload discovers peers and whether its names must be reachable from other networks.<\/p>\n When using Azure Private Link or service endpoints, distinguish a service’s private access path from application-subnet isolation. A private endpoint can make a PaaS resource available over a private IP, but it does not automatically fix missing DNS records or authorize every caller. Test name resolution and actual data-plane access from the correct subnet.<\/p>\n A common failure is a private endpoint that resolves to a public address from one environment and a private address from another. Check DNS forwarding and private zones before opening additional firewall ports. Access policy, route selection and name resolution must support the same target.<\/p>\n Create a hub VNet with an approved nonoverlapping prefix such as Peering is not inherently transitive. If the hub peers with two spokes, the spokes do not automatically acquire direct connectivity to each other through peering. Hub routing through a network virtual appliance or another supported design needs explicit route planning, forwarding permissions and firewall policy. Treat peering as a connectivity mechanism, not a substitute for security segmentation.<\/p>\napp-vnet<\/code> and uses 10.20.0.0\/16<\/code>. Reserve 10.20.1.0\/24<\/code> for a web subnet and 10.20.2.0\/24<\/code> for an application subnet. Reserve additional unused ranges for future workloads and platform-specific services. A separate hub VNet could use 10.30.0.0\/16<\/code> if that range is not already assigned elsewhere.<\/p>\nCreate a resource group and the first VNet<\/h2>\n
10.20.0.0\/16<\/code> and replace the proposed default subnet with explicit names and ranges that match the network design.<\/p>\n10.20.1.0\/24<\/code> and application subnet 10.20.2.0\/24<\/code>. Review whether any selected Azure service needs a delegated subnet or additional address reservation. A subnet’s purpose is not established merely by its name; security rules, route behavior and service attachment determine its actual boundary.<\/p>\nApply network security groups deliberately<\/h2>\n
Configure name resolution and private connectivity<\/h2>\n
Add a hub VNet and verify peering<\/h2>\n
10.30.0.0\/16<\/code>. Set up bidirectional peering between hub and application VNets, confirm each peering reaches Connected, and check the selected options for virtual network access and any intentional gateway transit.<\/p>\n