> ## Documentation Index
> Fetch the complete documentation index at: https://bunny.net/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Find Your PoP and Run Diagnostics

> Identify which CDN edge server is handling your requests and run network diagnostics.

## Find your PoP

Every response from Bunny CDN includes a `Server` header that identifies which PoP and server handled the request:

```
Server: BunnyCDN-{PoP Code}-{Server-ID}
```

**To find this header:**

1. Open your browser developer tools (`Ctrl + Shift + I` or `Cmd + Option + I`)
2. Go to the **Network** tab
3. Load a URL from your Pull Zone
4. Click on the request and find the `Server` header in the response headers

**Alternative:** Use the [Bunny Diagnostic Tool](https://tools.bunny.net/diagnostic-report) to automatically show your connection details and PoP routing.

## Detect CDN requests on your origin

When Bunny CDN fetches content from your origin, it includes identifying headers you can use for whitelisting or custom logic:

| Header | Value |
| - | - |
| `CDN-ServerId` | Internal server ID |
| `Via` | `BunnyCDN` |

### Other detection methods

**Custom hostname:** Use a unique, hard-to-guess hostname as your Origin URL that only Bunny servers access.

**Edge Server IP list:** Whitelist CDN IPs programmatically:

* IPv4: `https://bunnycdn.com/api/system/edgeserverlist`
* IPv6: `https://bunnycdn.com/api/system/edgeserverlist/IPv6`

> [!WARNING]
>
> CDN IPs can change. Automate IP list updates to prevent connectivity issues.

**Custom header via Edge Rules:** Add a secret header in Edge Rules that your origin validates for authentication.


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