It's a bad idea to.point the routers DNS back into the internal LAN network. A better configuration is to set your PiHole's IP Address in your DHCP config. Set up and IP alias on your pihole so it...

@Cozz Yes, it's all simple as that. I have exactly the same set up. Make sure the VPN subnet is in the list of authorised clients in AdGuard Home (if you use that functionality)

MrHC1983 wrote @Tescophil Trivial .......... no it's not as I want to use custom DNS for different devices..... so not one fits all mould...... It is trivial, you just need to RTFM....

@MrHC1983 MrHC1983 wrote I want the ability to add custom DNS for FIXED IP's....... Most DHCP servers are capable of this function, this would be useful to direct certain people out parental filters,...

Much better - CPU utilisation is much lower and flat at around 3% previously lots of spikes up to 30% - Memory utilisation is also flat - No more connectivity issues so far - Devices with multiple...

@MwaItou Yes, I used the default subnet of 192.168.0.1/24 as my management LAN. Do this, and there is no need for any manual config of new devices, use of DHCP option 138 or the discovery utility....