---
title: Heartbeat · Cloudflare Zero Trust docs
description: Appliance communicates periodically with Cloudflare via HTTPS. This
  is also known as a heartbeat, and lets Cloudflare know that the Appliance in
  question is connected to the Internet and reachable.
lastUpdated: 2025-10-27T11:06:15.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/cloudflare-one/networks/connectors/wan-tunnels/configuration/appliances/maintenance/heartbeat/
  md: https://developers.cloudflare.com/cloudflare-one/networks/connectors/wan-tunnels/configuration/appliances/maintenance/heartbeat/index.md
---

Appliance communicates periodically with Cloudflare via HTTPS. This is also known as a heartbeat, and lets Cloudflare know that the Appliance in question is connected to the Internet and reachable.

The heartbeat calls are made to `api.cloudflare.com`. Each Appliance has a heartbeat frequency of 10 seconds, independently of the number of WAN interfaces you have running on your device.

There are three symbols for the heartbeat signal that allow you to quickly check the status of Appliance:

* **Blue `i`**: Appliance is contacting Cloudflare as expected.
* **Yellow triangle**: Appliance has not yet connected to Cloudflare.
* **Red triangle**: There is a potential problem with Appliance.

### Access Appliance's heartbeat

1. Log in to [Cloudflare One](https://one.dash.cloudflare.com/), and go to **Networks**.
2. Go to **Connectors** > **Appliances** > **Profiles**.
3. Find your Appliance, and place your cursor over the icon on the **Status** column to check the timestamp. The timestamp shows you the last time Appliance successfully contacted Cloudflare.
