---
title: Require WARP · Cloudflare Zero Trust docs
description: Cloudflare One enables you to restrict access to your applications
  to devices running the Cloudflare WARP client. This allows you to flexibly
  ensure that a user's traffic is secure and encrypted before allowing access to
  a resource protected behind Cloudflare One.
lastUpdated: 2025-10-28T22:09:07.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/cloudflare-one/reusable-components/posture-checks/warp-client-checks/require-warp/
  md: https://developers.cloudflare.com/cloudflare-one/reusable-components/posture-checks/warp-client-checks/require-warp/index.md
---

Note

This device posture attribute will check for all versions of WARP, including the consumer version.

Cloudflare One enables you to restrict access to your applications to devices running the Cloudflare WARP client. This allows you to flexibly ensure that a user's traffic is secure and encrypted before allowing access to a resource protected behind Cloudflare One.

## Prerequisites

* Cloudflare WARP client is [deployed](https://developers.cloudflare.com/cloudflare-one/team-and-resources/devices/warp/deployment/) on the device. For a list of supported modes and operating systems, refer to [WARP Client Checks](https://developers.cloudflare.com/cloudflare-one/reusable-components/posture-checks/warp-client-checks/).

## 1. Enable the WARP check

1. In [Cloudflare One](https://one.dash.cloudflare.com), go to **Traffic policies** > **Traffic settings**.
2. Ensure that *Allow Secure Web Gateway to proxy traffic*\* is enabled.
3. Go to **Reusable components** > **Posture checks**.
4. In **WARP client checks**, select **Add a check**.
5. Select **WARP**, then select **Save**.

## 2. Add the check to an Access policy

1. In [Cloudflare One](https://one.dash.cloudflare.com), go to **Access controls** > **Applications**.

2. Locate the application for which you want to require WARP. Select **Configure**.

3. In the **Policies** tab, create a new Access policy or edit an existing policy.

4. In the policy builder, add an Include or Require rule which uses the *WARP* selector. Save the policy.

5. Save the Access application.

Before granting access to the application, the policy will check that the device is running the WARP client.
