I installed OpenWRT on an old Fritzbox 7360, wich has no WAN port. The Fritzbox is connected to a main router via LAN1, which provides the internet connection. The OpenWRT router has a static IP address and the main router acts as a gateway. I also have a Pihole as a DNS server on the first router. All DNS requests go through it, regardless of whether a DNS server is entered in OpenWRT or not.
I configured the Mullvad VPN service according to Mullvad's OpenWRT instructions on their website. In LuCi under Network > Interfaces I can see that MULLVAD_VPN has both TX and RX traffic. However, all internet traffic has no connection to Mullvad.
OpenWRT is new territory for me, does anyone have any advice?