Hello there.

I have a DECO M5 system in my home. I'm getting my internet from KPN via a router/modem, which we don't use for wifi. The MESH system is connected to that router. 

In my room I have one of the M5's and I have a few servers. One of the servers, a TRUENAS which I use for NEXTCLOUD, is my main machine. I wan't to use it outside my network. 

I've setup ClouDNS and the zone is running succesfully. But when I use port forwarding (see picture) it just does not work. I've contacted ClouDNS, but they say all is good and it is faillure with the forwarding. 

Is there anything I'm doing wrong, should I log in my normal modem from KPN and have to do something there?