xize11
4
On the SlateAx you use the default lan interface nothing advanced?
What also could be if I understood correctly:
You need to make sure your asus router gets the dns from your SlateAx, and you also need to make sure your client then uses the dns from the asus router if that makes sense.
However the tricky part is, I believe the domain name you try to bypass is from google, and google has ways to ignore the default dns settings, I noticed this on my android devices aswell, what I did was making a port forward from port 53 udp to the router ip this basicly forces all 53 dns traffic.
Editted I misreaded it for flint 