Azure Front Door gRPC support

Twan van Beers (NB) 50 Reputation points
2025-10-09T16:23:13.2566667+00:00

We have a tenant that is part of the private preview for gRPC through Azure Front Door, and that works well for our dev/testing, but our MS contact seems to have left.

We'd like to understand the ETA for getting gRPC working with Azure Front Door, as we are nearing a production date and would love to use gRPC through Front Door in Azure instead of having to look for a platform that does allow gRPC through the infrastructure

Azure Front Door
Azure Front Door

An Azure service that provides a cloud content delivery network with threat protection.

Answer accepted by question author
Anonymous
2025-10-09T20:24:37.0466667+00:00

Hello @Twan van Beers,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

I understand your question about ETA for getting gRPC working with Azure Front Door.

Currently, Azure Front Door does not support gRPC for backend connections in production. Although it enables HTTP/2 between clients and Front Door, the connection from Front Door to your backend still uses HTTP/1.1. Because gRPC requires HTTP/2 throughout, it cannot be fully supported through Front Door at this time.

Microsoft update: current status

  1. Frontend (client → Front Door): HTTP/2 is functioning correctly.
  2. Backend (Front Door → origin): Currently, only HTTP/1.1 is supported, which prevents gRPC calls from completing successfully.
  3. Microsoft has not provided a timeline or ETA for when full gRPC backend support will be introduced.
  4. If you’re testing in private preview, you may encounter limited functionality, and it is not intended or supported for production workloads.
  5. As of now, there is no public update or roadmap available for when gRPC backend support will be introduced to Azure Front Door.

For more information: https://learn.microsoft.com/en-us/azure/frontdoor/front-door-http2
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