I normally use AirVPN with openvpn in my computer, with openresolv to allow openvpn to connect to the server then change the DNS so it is tunnelled through the VPN connection. The openvpn config file I downloaded specifies a country, not a particular server, so DNS resolution is needed initially to make the connection.
However I am interested in putting the VPN inside a router instead, and I have been experimenting.
Looking at the instructions for ddrwt and here:
it seems it will not be possible to continue using my existing per-country configuration, as I need to give a specific IP address, ie choose just one server (and edit the .ovpn file accordingly).
At the moment, I am using an OpenNIC DNS server in parallel with the VPN one instead, but I'd rather not continue to do this. Am I right in thinking each query goes to both DNS servers (rather than using the second one only if the first doesn't return an IP address)?
Is there a way to select a country or region, rather than a specific AirVPN server, in this situation? I want to continue using openvpn manually as I understand and trust this method. I am also more familiar with the command line (ssh into the router) than LEDE/OpenWRT, which is new to me.