OpenVPN and local DNS (not Turris Omnia)

I’m using the following setup:

Turris Omnia:        (no DNS, DHCP-Option "6,")
DNS-Server:        (Raspberry Pi, dnsmasq)

OpenVPN network:

If I now connect a device over VPN, the gateway (Turris Omnia, from the VPN network is specified as DNS:

But that doesn’t take my local DNS into account! At the moment, there is no DNS at all.

How can I get my local DNS ( to be used instead of the VPN gateway ( He’s on another network. I’m a little at a loss right now.

I’m grateful for tips.

In /etc/config/openvpn you can set the server manually:
list push 'dhcp-option DNS'


Exactly what I was looking for. Thank you.