I've bought a Synology NAS and installed the OpenVPN server on it. I've managed to configure it and export his configuration to my laptop (running win10). Here it is the file:
remote XXXXXX.synology.me XXXX
I've put the ''redirect-gateway def1'' because I want all the data pass through my NAS Server and see my Public IP from there.
The NAS is located in my country inside a LAN with an static IP address (192.168.1.150).
I've configured the VPN server so that it assigns me a 10.8.50.X IP
Now that I'm abroad, I'm trying to use this function and the problem I've seen is that I can't use the network when I'm with this fully-tunnel setup. I tried to search info about it and it seems that I need to tell my router from home that an incoming IP 10.8.50.X IP should be redirected to my NAS 192.168.1.150 IP. That can be achieved by setting up a 'static route' in the router configuration, but sadly for me the router I have doesn't have that function of port forwarding. I still searching alternatives and I've decided to open a topic here. I've seen some prompts in the manual that maybe can be useful like ''client-nat snat|dnat network netmask alias'', but I don't know how to use them. So, I think I need advice from people more knowledgeable than I.