Asustor and access from anywhere

Hello there,

First of all, sorry for my bad skills in english.

I've installed Ubooquity from Appcentral (kind of Appstore for Asustor NAS).

Everything is running perfectly, except some thumbnails but it's ok.

I only can access to Ubooquity from my local network, how can I manage to get a direct access to my comics library ?

I can connect to my NAS from anywhere, (through EZconnect Asustor), but then i cannot access to Ubooquity from the NAS home page.

Thanks for your help and merry Christmas.