Proxmox Firewall Blocking Access to Container via Domain Name, but Allows Direct IP Access

[jmsimon]

Hello everyone,

Let me explain the situation to see if you can help me:

I have configured the firewall in Proxmox to access a container running Proxmox Backup Server.

The rules I’ve applied to the PBS container are the following:

• Block any request and protocol from any IP.
• Allow TCP requests from a list of IPs (the two devices I want to access from the browser to view or configure something).

The thing is, these rules are working correctly. However, when instead of accessing the container via IP, I try to access it via domain (configured in another container with Nginx and Cloudflare), I can't access my target container and I don't know what might be missing in the configuration.

To summarize:

Without Proxmox firewall active --> I can access the container without any issues, both by direct IP and domain name.
With Proxmox firewall active --> I can access the container via direct IP, but not by domain name.

Any ideas on where to start?

Thanks in advance! Best regards!

 

[SteveITS]

Is your hostname pointing to Cloudflare? If so have you allowed their IP(s)?