Azure Virtual Network
Azure Virtual Network is Microsoft's networking service that lets you create private, isolated networks in the cloud where you can securely run your Azure resources.
Overview
Azure Virtual Network (VNet) provides a secure, private network environment in the cloud. Think of it like having your own private corporate network, but in Azure's cloud instead of in a physical building. You control what can connect to this network and how resources within it communicate with each other and the internet.
The service allows you to segment your network into subnets (smaller network segments), define custom IP address ranges, and set up network security rules. It's the foundation for how your Azure resources communicate securely with each other, with the internet, and with your on-premises networks.
One of its key features is the ability to create isolated environments for your applications while still allowing controlled communication between these environments. You can set up security rules to control traffic between subnets, filter network traffic, and block unauthorized access.
Virtual Network also supports hybrid connectivity, allowing you to securely connect your cloud network to your on-premises network using VPN connections or dedicated private connections (ExpressRoute). This enables scenarios where some resources can remain on-premises while others run in the cloud.
Example uses
Application Infrastructure: Create secure networks for multi-tier applications with separate subnets for web, application, and database tiers.
Hybrid Cloud: Connect your on-premises network to Azure resources securely.
Development and Testing: Create isolated network environments for development and testing.
Regional Expansion: Connect resources across different geographic regions securely.
Integration with other Azure services
Virtual Network integrates with many Azure services:
- Azure VMs: Provide network connectivity for virtual machines
- Azure App Service: Enable secure application networking
- Azure SQL Database: Create private database endpoints
- Azure Kubernetes Service: Network containerized applications
- Azure Firewall: Protect network resources
- Azure Load Balancer: Distribute network traffic
Similar services in other clouds
Other major cloud providers offer similar virtual networking services:
AWS:
- Virtual Private Cloud (VPC)
- Transit Gateway
Google Cloud:
- Virtual Private Cloud (VPC)
- Cloud VPN
While these services provide similar networking capabilities, Azure Virtual Network distinguishes itself with its deep integration with Azure services, hybrid networking features, and comprehensive security options.