@Lori-77: The port forwardings were definitely not saved (don’t know what you mean by “according to IB3”), but perhaps they are stored in the local file. I think the whole thing with the save in Kundencenter is intended more for the most important settings of dummy users, so that after a device replacement or firmware update they can continue to work normally and don’t have to use support. Let’s be honest, most users are interested in the SSID and the WiFi password and of course the phone book if you want to use that.
Nevertheless, it is simply a shame that more experienced customers are lulled into the security of not being able to lose their settings. But the same applies here: Whatever configuration you do, you should document it (which of course doesn’t help me with 30-40 network devices that I have named, I would have to hack them in again despite the documentation).