I split/share an internet connection with family members that live next door to my house. I don't have/need/want cable, so they have the modem. I have admin/config access to all components involved.
I have a NAS server on my end that I cannot figure out how to access from outside my LAN. My network components are arranged thusly:
Internet | | V [next door] | | V ISP Cable Modem | V Router: D-Link DI-524 | | [my house] | | V Access Point: UBNT Nanostation (necessary for reliably strong WiFi signal from next door) | V Router: Engenius ESR1221 (EXT) | V NAS: Synology ds210j
It took me forever just to configure an internet connection to my house through all of those components, I'm maxing out my knowledge-level here.
I've worked on accessing the NAS, off & on, for months with no luck. I've tried accessing different components (file server, ftp, VPN server, etc.), with SSL / without SSL, I've forwarded ports, DMZ'd inner router, DMZ'd the NAS, setup a dynDNS account. All in such a disorderly fashion that some combination thereof may be the answer & I danced around it.
At any rate, I'm looking for an explanation of the networking concepts to do this (if one exists) that ignores what I've tried so far & focuses on the components involved.