Asked 1 month ago by NovaMariner300
What are the key differences between Azure VNET integration and VNET injection?
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There is some confusion between the terms VNET integration and VNET injection in Azure services.
For instance, Azure Web Apps uses VNET integration to enable outbound traffic from the app to the VNET without placing the app inside the network.
In contrast, services like PostgreSQL Flexible Server use VNET injection, which deploys the service directly into a VNET subnet to allow inbound private access, as detailed here: https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/concepts-networking-private
What are the general differences between these approaches? Do these terms have service-specific meanings, or is there a broader distinction between them?
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Answer by 
TychoAI Agent • 1 month ago
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Below is a concise explanation of the difference between VNET integration vs. VNET injection in Azure:
VNET Integration
- Outbound connectivity: Services (such as Azure Web Apps) that use VNET integration are typically hosted outside the customer’s VNET but enable an outbound connection into the VNET.
- Use Case: For example, a Web App configured with VNET integration can reach resources (like databases or APIs) in the VNET. It does not mean that the Web App itself is “inside” the private network.
- Limitation: The integration only affects outbound traffic; the service endpoint itself might still be reachable via a public endpoint.
VNET Injection
- Deployment into a Subnet: VNET injection refers to the process where a managed service (like PostgreSQL Flexible Server) is deployed or “injected” directly into a customer’s VNET subnet.
- Inbound connectivity: This setup assigns a private IP address to the service endpoint, thereby enabling inbound access exclusively via the VNET.
- Enhanced Isolation: The service becomes part of the private network, and users can enforce network security policies (e.g., using Network Security Groups) to control both inbound and outbound traffic.
Summary
- Different Contexts, Different Meanings:
- For Azure Web Apps: VNET integration is primarily about giving the app outbound connectivity to resources in a VNET without changing its public exposure.
- For services like PostgreSQL Flexible Server: VNET injection means the service itself is placed inside a VNET, thus allowing private (inbound) connectivity and enhanced isolation.
- Terminology Usage: While Microsoft may sometimes use the terms interchangeably in informal discussions, the technical distinction remains important. The context of the service determines whether you’re merely providing connectivity (integration) or actually placing the service within your network (injection).
Understanding the network deployment (whether the service is “inside” your VNET or simply has connectivity out to it) is key when choosing the approach to secure your Azure services.
Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?
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Answer by AsteroidResearcher704 • 1 month ago
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What is the difference between Azure VNET integration and VNET injection?
Here is the detailed explanation about VNET injection and VNET integration.
VNET Integration: It is mainly used to connect an Azure Pass service to a virtual network to enable communication between the Paas service and resources within the VNET.
You can also use network security groups or route tables on this subnet to control all outbound traffic from your applications.
It mainly used for Outbound traffic from the Azure PaaS applications, Follow the link by KapilAnanth-MSFT
Example: When you enable VNET Integration for an Azure Web App, the web app can send traffic to Azure resources inside a VNET, but it doesn't directly receive traffic from the VNET. It's primarily for outbound connections.
VNET Injection: VNET injection is a more specific term that often implies deploying an Azure service directly into a VNET subnet, making it part of the VNET's private IP address space.
The virtual network injection allows an Azure resource to inject containerized workloads into an Azure virtual network so that resources in Azure can be accessed via a private IP address on the virtual network. After you've configured virtual network injection for a resource in a virtual network and enabled the resource as a target, follow the Virtual network injection for more details.
Example : The Azure VNET injection allows the Azure database server to be deployed into a VNET subnet, enabling private access from other resources within the VNET.
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