---
description: Replace your VPN with Cloudflare Zero Trust.
title: Troubleshooting
image: https://developers.cloudflare.com/og-docs.png
---

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# Troubleshooting

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://e8aee267.previews.developers.cloudflare.com/learning-paths/replace-vpn/troubleshooting/index.md)|[Agent setup](https://e8aee267.previews.developers.cloudflare.com/agent-setup/)

Learn how to troubleshoot your ZTNA deployment.

## Objectives

By the end of this module, you will be able to:

* Investigate why users cannot connect to private network applications behind Cloudflare Tunnel.
* Fix the most common causes of connectivity issues.

Troubleshoot the Cloudflare One Client

For step-by-step guidance on diagnosing and resolving Cloudflare One Client issues, refer to the [Cloudflare One Client troubleshooting guide](https://e8aee267.previews.developers.cloudflare.com/cloudflare-one/team-and-resources/devices/cloudflare-one-client/troubleshooting/troubleshooting-guide/). The guide covers:

* How to collect diagnostic logs via the Cloudflare dashboard or CLI
* How to review key configuration files
* Common misconfigurations and their fixes
* Best practices for filing support tickets

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