NordVPN configuration

[kr1p]

Hi,
I have found this tutorial https://support.nordvpn.com/Connectivity/Router/1292598142/OPNsense-19-1-setup-with-NordVPN.htm
I dont understand why I have to add an opt1 interface named NordVPN.
On my hardware i have 3 interfaces and i cant add a nordvpn interface...
In the tutorial when configuring openvpn client, interface is set to any so i guess all interfaces will use the openvpn client...all the rest of the tutorial is about configuring dns on the specific interface.
Should i just link the unbound DNS to my wan interface so it uses Nordvpn and replace in the tutorial all Nordvpn interface with my wan interface?
Also i dont quite understand unbound dns. I have checked the documentation here https://docs.opnsense.org/manual/unbound.html but the definition is blurry...what does it mean?

[fbeye]

I think the op1 is more of a virtual network it creates. My server has 4 NIC's (proliant server) and I just followed the howto, and in the end it works flawlessly.
Not sure if the Unbound DNS is set for all LAN hosts to have a DNS to use (assuming nords) but I run a PiHole VM and just have that ip (192.168.5.46) be set as my LAN DHCP DNS server. All works fine.

[Irishfluter]

You are using Unbound in "query forwarding mode."  Basically, you are just pointing the router to NordVPN's DNS servers.