Question VPN and Asus RT-AC68P

Trying to figure out how to install VPNPro into my Asus router.
It asks for Import .ovpn file ?
Where do I find this file?
A VPN has two sides. Client or server.
A VPN server on your Asus would provide secure remote access to your LAN.
A VPN client would allow your LAN devices to route traffic through a remote server.
Which end are you trying to configure?
 
I'm trying to add secure access to all devices that connected to router by wireless and cable
"Secure access to" means, to me remote access to your devices. Is that what you are trying to do?
If so, then you need to configure a VPN SERVER on your router.
A ".ovpn" file would be if you were trying to connect to a remote VPN server as a client. Do you have a subscription to a VPN service ?
 
It all depends on the vpn company. Most people are not running vpn on a router. OVPN files are basically the vpn company configuring your router for you. Some choose to not spend any of their money helping potentional customers like you. Some vpn companies are dishonest, the so call free ones tend to be worse. They require people to run their VPN app on the computer or their phone. Sometimes these app have advertising or even worse built into them which of course will not run on a router.

Pretty much you look though the vpn company site and try to see if they provide OVPN files. If not look to see if they have any information about running vpn on a router or even linux. You should then with some effort be able to manually set the parameters in the router vpn screens. If there is no discussion of how to manually configure a vpn client choose another vpn provider. The best vpn clients to run on a pc are not the ones you download from the vpn company. Use of one of the open source clients is best but then you must manually configure the settings. You at least know there is no other garbage being run. Some very shady vpn companies got caught running bit coin mining years ago when coin mining was more popular.