Error 1033
This error indicates an issue with Cloudflare Tunnel.
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.
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 in the Cloudflare dashboard ↗ by going to Networking > 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. | Install and run cloudflared on your origin server to connect the tunnel to Cloudflare. You can find the installation command in the Cloudflare dashboard under Networking > Tunnels — select your tunnel, then on the Overview tab select Add a replica. For API-based setup, refer to Install and run the tunnel. |
| Down | The tunnel was previously connected but is currently disconnected because the cloudflared process has stopped. | 1. Ensure the cloudflared 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 could risk the tunnel going down and failing to serve traffic. | 1. Review your cloudflared 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. |