Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
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The Basics
- Nextcloud Server version (e.g., 29.x.x):
latest
- Operating system and version (e.g., Ubuntu 24.04):
Fedora 42 IoT
- Is this the first time you’ve seen this error? (Yes / No):
- `Yes
- When did this problem seem to first start?
On install
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
- `I’m installing AIO using Podman, I followed the instructions here
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
I’m running nextcloud using podman quadlets following the guide linked above. I’m using a dynamic dns to access my web server but because my home network doesn’t allow NAT hairpinning I had to set a local dns entry on a pihole server I run. This just redirects my DDNS domain to the LAN ip of my server. The issue is when I try to enter a domain on the AIO install page, it errors with The domain is not reachable on Port 443 from within this container. Have you opened port 443/tcp in your router/firewall? If yes is the problem most likely that the router or firewall forbids local access to your domain. You can work around that by setting up a local DNS-server.
Log entries
From the nextcloud aio container:
NOTICE: PHP message: Info: It seems like the ip-address of <domain name>.duckdns.org is set to an internal or reserved ip-address. (It was found to be set to '192.168.0.89')
From the domain check container:
2025-06-08 18:53:54: (../src/server.c.1974) server started (lighttpd/1.4.79)
Final Thoughts
I’m sure the issue has something to do with my networking and I’d love some help there, but if there’s a better way to install with Podman I’d be happy to reexamine my strategy here. Thanks!