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Oct 10, 2025
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Added note on behavior of custom headers in HAR files #25745

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Added note on behavior of custom headers in HAR files
dledfordcf Oct 9, 2025
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maxvp Oct 10, 2025
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18 changes: 17 additions & 1 deletion src/content/docs/cloudflare-one/policies/gateway/http-policies/tenant-control.mdx
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Expand Up @@ -23,6 +23,22 @@ To create an HTTP policy with custom headers:

Your policy is now displayed in your list of HTTP policies. When your users attempt to authenticate your configured SaaS application with a personal account, authentication will fail.

### Verify custom headers

If you save a HAR (HTTP Archive) file from a browser to analyze your web traffic, custom headers defined with Gateway will not appear in the file. This is because Gateway injects the header after the request leaves the browser.

To verify Gateway is applying a custom header:

1. In your policy with custom headers, add a selector to match traffic for [HTTPBin](https://httpbin.org/), an open-source site for testing HTTP requests. For example:

| Selector | Operator | Value | Logic | Action | Untrusted certificate action |
| ----------- | -------- | ------------------ | ----- | ------ | ---------------------------- |
| Application | in | _Google Workspace_ | And | Allow | Block |
| Domain | in | `httpbin.org` | | | |

2. On your device, go to [`httpbin.org/anything`](https://httpbin.org/anything). Your custom header will appear in the list of headers.
3. (Optional) Remove the HTTPBin expression from your policy.

## Common policy configurations

Depending on which SaaS application your organization needs access to, different tenant control policies are required.
Expand Down Expand Up @@ -117,7 +133,7 @@ You can include custom headers in an HTTP policy to allow your users through [Cl

You can configure [Browser Isolation](/cloudflare-one/policies/browser-isolation/) to send custom headers. This is useful for implementing tenant control for isolated SaaS applications or sending arbitrary custom request headers to isolated websites.

To use custom headers with Browser Isolation, create two HTTP policies targeting the same domain or application group. For example, you can create policies for [httpbin](https://httpbin.org/), an open-source site for testing HTTP requests:
To use custom headers with Browser Isolation, create two HTTP policies targeting the same domain or application group. For example, you can create policies for [HTTPBin](https://httpbin.org/), an open-source site for testing HTTP requests:

1. Create an Isolate policy for `httpbin.org`.

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