Nextcloud, Cloudflare, Unraid, Docker -- Access through untrusted
domain. Cloudflare tunnel. Config.php updated. Help?
reddit / selfhosted

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nagol0123 · 2023-12-02 18:16

Hi selfhosted peeps,

I'm having some issues getting Nextcloud up and running outside my
home network. I have configured Nextcloud in Docker on my Unraid
server. I’m able  to access it from my LAN on the port I configured,
444. (Note: I’m  accessing my home network through an OpenVPN
connection) I’ve set up a  Cloudflare tunnel, added the domain, and
Cloudflare shows the connection  has healthy.

However, when I try to access my Nextcloud from my custom sub-domain
[Nextcloud.example.com](http://nextcloud.example.com/), I get an "
Access through untrusted domain" message suggesting:

“Please contact your administrator. If you are an administrator, edit
the “trusted\_domains” setting in config/config.php like the example
in  config.sample.php.”

So, I go to the terminal in Unraid, open Config.php, scroll down to
trusted domains and add 1 =>
‘[Nextcloud.example.com](http://nextcloud.example.com/)’

However, this has not solved the problem and I still get the error
message.

I’m sure I’m just missing something obvious. Please let me know if
there’s any additional info that’s needed to answer this and thanks
for  taking the time to help!

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sesscon · 2023-12-03 00:55

Hi there,

I understand you're facing issues accessing your Nextcloud instance
externally through a Cloudflare tunnel, despite updating the
`config.php` file. Let's go through some troubleshooting steps to
resolve this:

1. **Verify `config.php` Changes**: Ensure that the domain is
correctly entered in the `config.php`. The format should be:
   ```php
   'trusted_domains' =>
   array (
     0 => 'your-local-ip',
     1 => 'Nextcloud.example.com',
   ),
   ```
   Make sure there are no typos or syntax errors.

2. **Clear Cache**: After updating `config.php`, clear the cache on
your browser or try accessing the page from an incognito window to
avoid cache-related issues.

3. **Restart Docker Container**: Sometimes changes don’t take effect
until the Docker container is restarted. You can do this from the
Unraid Docker interface.

4. **Check DNS Propagation**: Ensure that your subdomain
`Nextcloud.example.com` is properly propagated and pointing to the
correct IP. You can use online tools like
`https://www.whatsmydns.net/` to check DNS propagation.

5. **Cloudflare SSL/TLS Settings**: If you're using Cloudflare's
proxy, check the SSL/TLS encryption mode. It’s recommended to use
“Full” or “Full (Strict)” mode for secure communication.

6. **Firewall and Ports**: Verify that the ports required by Nextcloud
are open and not blocked by any firewall. Since you are using a custom
port (444), ensure it's correctly configured in your router and
Cloudflare.

7. **Check Cloudflare Tunnel Configuration**: Ensure that the
Cloudflare tunnel is correctly set up and pointing to your Unraid
server where Nextcloud is hosted.

8. **Logs Analysis**: Check the Nextcloud and Unraid logs for any
specific error messages that could provide more insight into the
issue.

9. **Alternative Trusted Domains Method**: As a last resort, try
adding your domain directly in `config.sample.php` and then rename it
to `config.php`.

If these steps don’t resolve the issue, please share any error logs or
additional details you think might be relevant. This will help in
diagnosing the problem more accurately.

Hope this helps!