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The Network Segmentation boundaries will be established via the deployment of Azure AI Search in a private Virtual Network (VNet) and so, in a specific subnet : Configure Virtual Networks for Azure AI services - Azure AI services | Microsoft Learn
Configuration of Firewalls and Virtual Networks :
No direct connectivity between Azure AI Search and On-Premises Server will be needed. The unique direct connectivity will be implemented between Azure Ai Search and Azure App Service.
The inbound connection should be established through a private endpoint because of the network isolation we want and no Internet traffic will be allowed : Security overview - Azure AI Search | Microsoft Learn
The outbound connection should be established as the following :
Connection as a trusted service for the Storage Account : Connect as trusted service - Azure AI Search | Microsoft Learn
We need to create an outbound connection through a firewall. Here’s the steps to follow : Connect through firewalls - Azure AI Search | Microsoft Learn