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platform-level visibility before the function host

Jeff Goodwin 0 Reputation points
2026-06-10T18:05:07.6766667+00:00

We are not asking about missing Application Insights logs within the function. We want to know if there is any platform or infrastructure-level logging — below the function host — that records inbound HTTP requests reaching the Azure networking layer before they are handed to the function runtime.

Azure Functions
Azure Functions

An Azure service that provides an event-driven serverless compute platform.

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  1. Pravallika KV 17,025 Reputation points Microsoft External Staff Moderator
    2026-06-10T18:57:49.5366667+00:00

    Hi @Jeff Goodwin ,

    Thanks for the confirmation, glad you were able to figure out the root cause and its workaround.

    For a standard multi-tenant Azure Function App, there is no customer-accessible platform or infrastructure-level logging that captues every inbound HTTP request at the Azure networking/front-end layer before they are handed off to the Functions host.

    The earliest request-level visibility available typically begins at the App Service/Functions runtime layer (for example, Application Insights, Functions host logs, or App Service HTTP logs if enabled).

    If the Function App is fronted by services such as Azure Front Door, Application Gateway, APIM, or Azure Firewall, those services can provide pre-host request logging, but Azure does not expose equivalent front-end platform logs for the underlying App Service infrastructure itself.

    Hope this helps!

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