Is Fingbox compatible with Synology NAS?
If you are facing issues while using Fingbox and Synology NAS, then please make sure all ports needed for Fingbox are open. Ports 80, 443 are usually used by Synology NAS. You will need to change those port configurations so that both of these devices can work together.
This is just a sample from WD on how to do this. This is from their community forum.