I see you’ve mentioned placing your FreedomBox in the DMZ and also forwarding ports. Typically, it’s best to choose one approach to avoid potential configuration conflicts. If your Dahua camera server is on the same network as your FreedomBox, there’s a workaround that allows both devices to efficiently coexist:
If both the FreedomBox and the Dahua server require access through port 443, you could configure your router to forward an alternative port (for example, port 4443) to the Dahua server’s port 443. This way, you can reach your Dahua server at yourdomain.name:4443, while access to your FreedomBox’s web interface remains available directly through yourdomain.name without specifying a port.
This setup enables you to maintain clear access routes to both servers without having to compromise on the accessibility or functionality of either device.