Hello everyone,
Secure application delivery is a central topic in modern cloud architectures. As organizations increasingly adopt private networking models, controlling how applications are exposed becomes a key design consideration.
A new capability in Azure Application Gateway v2 introduces the concept of a Private Application Gateway, allowing the service to operate entirely within private network boundaries.
What is a Private Application Gateway
Traditionally, Application Gateway has been widely used to publish web applications to the internet while providing features such as load balancing, TLS termination, and web application firewall (WAF) protection.
With the private deployment model, the gateway can now operate without a public endpoint, serving applications that are only accessible within private network environments.
This approach aligns well with architectures that rely on private connectivity, such as internal applications, enterprise APIs, and backend services that should not be exposed publicly.
Where this fits in modern architectures
Many organizations are moving toward architectures where most workloads remain private and external access is tightly controlled. In these scenarios, services such as private endpoints, internal load balancing, and private gateways play an important role.
A Private Application Gateway can act as the internal entry point for applications hosted within a virtual network, providing layer-7 routing, TLS management, and optional WAF protection while keeping the service isolated from the public internet.
Operational considerations
When designing architectures around private gateways, connectivity becomes an important factor. Access may come through VPN, ExpressRoute, or other private connectivity mechanisms.
This allows organizations to expose applications securely to internal users, partner networks, or hybrid environments without requiring direct internet exposure.
Final thoughts
The introduction of Private Application Gateway expands the flexibility of Azure Application Gateway for enterprise architectures.
For organizations prioritizing private networking and controlled exposure of applications, this capability offers another building block for designing secure and scalable application delivery architectures in Azure.