I have the swisscom internet-box.
I have a computer with a fixed ip internal address that the internet-box sees fine.
When I set up port-forwarding it works properly.
But when I set that fixed-ip device as the dmz device I can’t connect to arbitrary ports on the device.
For example, if I turn on the iCal-Server on the device and manually forward ports 8008 and 8443 then I can connect through the internet-box just fine. But if I don’t manually forward this ports I’m unable to connect even though I have it set to be in the dmz…
Can you confirm if the DMZ should actually be working?