--- description: Troubleshoot Cloudflare 1033 error code. title: Error 1033 image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/support/llms.txt > Use this file to discover all available pages before exploring further. # Error 1033 Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1033/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/) ## Error 1033: Cloudflare Tunnel error This error indicates an issue with [Cloudflare Tunnel](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-one/networks/connectors/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` in the [Cloudflare dashboard ↗](https://dash.cloudflare.com/) 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](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/get-started/create-remote-tunnel-api/#4-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](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/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://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/configure-tunnels/tunnel-availability/) could risk the tunnel going down and failing to serve traffic. | 1\. Review your cloudflared [logs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/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://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/configure-tunnels/tunnel-with-firewall/). | Was this helpful? YesNo ## On this page [![](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1033/#page","headline":"Error 1033 · Cloudflare Support docs","description":"Troubleshoot Cloudflare 1033 error code.","url":"https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1033/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-24","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. 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