# Azure Front Door: Our services aren't available right now (503/502 from Front Door)

**Code:** `Our services aren't available right now` · **Category:** Azure · **Seen on:** Azure

Front Door couldn’t get a valid response from your origin — origin down, health probes failing, TLS/host header mismatch, or a timeout.

## Meaning

The page shows an x-azure-ref you can look up. Common: origin certificate name doesn’t match the origin host header, private link/origin firewall blocking Front Door, or responses exceeding the timeout.

## Common causes

- Origin unhealthy or probe path failing
- Origin host header/certificate mismatch
- Origin firewall not allowing AzureFrontDoor.Backend service tag
- Response slower than origin timeout

## Quick fix

1. Check origin health and probe settings
2. Set origin host header to a name the origin’s certificate covers
3. Allow the AzureFrontDoor.Backend service tag / X-Azure-FDID check

## Detailed fix by platform

### Azure CLI

1. `az afd origin show -g rg --profile-name fd --origin-group-name og --origin-name app --query "{host:hostName,hostHeader:originHostHeader,enabled:enabledState}"`

## How to diagnose

1. **Reference** — x-azure-ref in diagnostics logs
2. **Health** — Origin health %
3. **TLS** — Certificate CN/SAN vs host header

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Source: [WhatIsMyError](https://whatismyerror.com/errors/azure/front-door-our-services-arent-available)