---
title: Error 1033 · Cloudflare Support docs
description: This error indicates an issue with Cloudflare Tunnel.
lastUpdated: 2025-10-20T14:21:37.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1033/
  md: https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1033/index.md
---

## Error 1033: Cloudflare Tunnel error

This error indicates an issue with [Cloudflare Tunnel](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/).

### Common cause

You have requested a page on a website (`tunnel.example.com`) that is on the Cloudflare network. The host (`tunnel.example.com`) is configured with Cloudflare Tunnel, and Cloudflare is currently unable to resolve it.

### Resolution

A `1033` error indicates your tunnel is not connected to Cloudflare's network because Cloudflare's network cannot find a healthy `cloudflared` instance to receive the traffic.

First, review whether your tunnel is listed as `Active` on the [Zero Trust](https://one.dash.cloudflare.com/) dashboard by going to **Networks** > **Tunnels** or run `cloudflared tunnel list`. If the tunnel is not `Active`, review the following and take the action necessary for your tunnel status:

| Status | Meaning | Recommended Action |
| - | - | - |
| **Healthy** | The tunnel is active and serving traffic through four connections to the Cloudflare global network. | No action is required. Your tunnel is running correctly. |
| **Inactive** | The tunnel has been created (via the API or dashboard) but the `cloudflared` connector has never been run to establish a connection. | Run the tunnel as a service (recommended) or use the `cloudflared tunnel run` command on your origin server to connect the tunnel to Cloudflare. Refer to [substep 6 of step 1 in the Create a Tunnel dashboard guide](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/get-started/create-remote-tunnel/#1-create-a-tunnel) or step 4 in the [Create a Tunnel API guide](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/get-started/create-remote-tunnel/#1-create-a-tunnel). |
| **Down** | The tunnel was previously connected but is currently disconnected because the `cloudflared` process has stopped. | 1. Ensure the `cloudflared` [service](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/do-more-with-tunnels/local-management/as-a-service/) or process is actively running on your server. 2. Check for server-side issues, such as the machine being powered off, an application crash, or recent network changes. |
| **Degraded** | The `cloudflared` connector is running and the tunnel is serving traffic, but at least one individual connection has failed. Further degradation in [tunnel availability](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/configure-tunnels/tunnel-availability/) could risk the tunnel going down and failing to serve traffic. | 1. Review your `cloudflared` [logs](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/monitor-tunnels/logs/) for connection failures or error messages. 2. Investigate local network and firewall rules to ensure they are not blocking connections to the [Cloudflare Tunnel IPs and ports](https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/configure-tunnels/tunnel-with-firewall/).  |
