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I configured my nanopc-t4 (running armbian) (raspberry pi 3 alternative, not going into details) as a wireless VPN router.
This is my setup:
This is working fine, all my wifi devices are connected with my wifi router and all traffic flows nice and smoothly through the vpn tunnel (note, 192.168.0.0 subnet not reachable for 192.168.1.0 subnet)
Expected Behaviour:
To install Pi-Hole on the same device (and to act as a DNS server for my wifi devices), all Pi-Hole traffic should go through the VPN tunnel as well.
Actual Behaviour:
I can't setup Pi-Hole, when asked for the gateway IP (the TUN device), this is (and should never be in my setup) static.
Does somebody have any idea how to solve this issue?