There are several ways to connect Azure Functions to an internal corporate network:
Use a Virtual Network: Create a virtual network in Azure and then use a VPN gateway to connect Azure to the company’s internal network. This allows Azure Functions to access internal resources.
Use Hybrid Connections: Using hybrid connections allows Azure Functions to securely connect to enterprise applications and data through an intermediary proxy provided by the cloud service provider. This method does not require changes to firewall settings or other network configurations.
Use Public IP Address: If internal resources can be accessed via a public IP address, Azure Functions can directly access them.
Use ExpressRoute: ExpressRoute is an advanced connectivity option that provides a dedicated communication path for extending your on-premises infrastructure into Microsoft’s cloud services. Using ExpressRoute enables private, high-speed, low-latency, secure, and reliable connections between Azure Functions and the enterprise internal network.
Choose the most appropriate method based on your specific needs and requirements.