We have problems with our port mapping infrastructure at the moment. We working hard to get everything up and running again and apologize for any inconveniences.
We will report here if everything is up and running again.
[UPDATE]: The port mapping should work as excpected again. Sorry again for the service interruption. The service was unavailable from around 2pm CET to 4:30pm CET. It was recognized that some updates for IPs didn't work anymore and during further investigation the whole system was getting down. We used this to update our system, which was planed before but scheduled for a planed downtime. If you will still consider problems with our port mapping feel free to write us a mail. Thanks a lot.