Vpn consequences should be taken care of

The following discuss px4 forum is highly informational and descriptive indeed.I have following two queries in this trail that I have setup my router to create a OpenVPN connection and I have installed the OpenVPN app on my Samsung Android phone. Uptil this it worked out fine.
Now I just want to view my cameras using the iVMS-4500 app on my phone, while I’m on the OpenVPN connection. But I don’t know anything about what information I have to enter into the app.I have thought that I can choose between HiDDNS - IP/Domain - IP Server, but I think I have to use IP/Domain.
But,when I selecting the IP/Domain, I entered the IP of my camera (10.0.0.100) in the adresse field, and the portnumber in the port field, and then username and password. But it does not work.And secondly,I am unable to setup VPN server In my Arlo pro 2.Suggest us what to do regarding these arlo app for pc resolution?