platform-level visibility before the function host

Question

platform-level visibility before the function host

Jeff Goodwin 0

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.

Pravallika KV 16,945 Reputation points Microsoft External Staff Moderator

2026-06-10T18:57:49.5366667+00:00

Hi @Jeff Goodwin ,

Thanks for reaching out to Microsoft Q&A.

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.
Pravallika KV 16,945 Reputation points Microsoft External Staff Moderator

2026-06-15T23:46:04.9033333+00:00

Hi @Jeff Goodwin , following up to see if you had a chance to check the above response and if it was helpful. Please let me know if you have any questions.
Jeff Goodwin 0 Reputation points

2026-06-17T13:56:57.5466667+00:00

Thank you for checking back. The information you provided is what we suspected was the case.

We were able to find a workaround for the root cause of the issue we were tacking.