Error 1033

Error 1033: Cloudflare Tunnel error

This error indicates an issue with Cloudflare Tunnel.

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 ↗ 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 or step 4 in the Create a Tunnel API guide.
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.