I missed something !
How are you trying to view the BI PC remotely ? with UI3 or the Cell phone BI APP ?
Why is the internet blocked on the router ? If the internet is blocked on the router You will never access the VPN ? None of the computers on your home network access the internet. None of the home cell phones use WIFI to access the internet.
Are you using ASUS for your
DDNS service address resolution ?
On the asus router provide screen shots of
1) The main screen , Block out the last part of the WAN ID, Block out the first part of the DDNS.
2) VPN server, with the OPEN VPN server selected
Provide a complete network diagram !