You cannot use a VPN with a local address given by your router-/modem.
IPs like 192.168.X.1, 127.0.0.1, etc are not really working with vSRO (as I can say it from my experience with 188 and 193 files), but does with cSRO-R, somehow.
You have to use at least a DynDNS (like no-ip) redirecting connections directly to your router-/modem, which in this case will leave the connections open (ports) requesting and sending data/permissions to the silkroad modules.
As far as you are NOT hosting the server locally (everyone connected to your Router-/Modem) you won't be able to host the server for someone outta your environment/house/room.
So either use hamachi for a private lounge of players (more likely to control the activity) or get a free dynamicalDNS (if your ISP hardware supports it. Fritz.box 3790 or higher does support it natively).
If you want some help regarding to this issue, hit my up on epvpers via PM or via skype (vegasvolt3ya9a).
Edit, haven't noticed it:
And btw, you are using hamachi as your primary IPv4 connective interface. You won't be able to use your local IP.
So, hit me up on Skype or via PM.