1) We have Windows server DNS and DHCP for our main network, which we only want to use only on that network. I have entered different DNS entries on the LAN details section but they all default to 8.8.8.8 even though 8.8.8.8 is not specified in any of the LANS I created:

https://imgur.com/C5Ndkyq

MAC Address IP Address Subnet Mask DHCP Server DNS
LAN1 00-1D-AA-21-26-68 192.168.1.1 255.255.255.0 Yes 8.8.8.8
LAN8 00-1D-AA-21-26-68 192.168.8.1 255.255.255.0 No 8.8.8.8
LAN14 00-1D-AA-21-26-68 192.168.14.1 255.255.254.0 Yes 8.8.8.8
LAN16 00-1D-AA-21-26-68 192.168.16.1 255.255.248.0 No 8.8.8.8
IP Routed Subnet 00-1D-AA-21-26-68 192.168.0.1255.255.255.0 Yes 8.8.8.8



but if I select
X Force router to use "DNS server IP address" settings specified in LAN8 then it forces all LANS to use the DNS on LAN8


MAC Address IP Address Subnet Mask DHCP Server DNS
LAN1 00-1D-AA-21-26-68 192.168.1.1 255.255.255.0 Yes 192.168.8.3
LAN8 00-1D-AA-21-26-68 192.168.8.1 255.255.255.0 No 192.168.8.3
LAN14 00-1D-AA-21-26-68 192.168.14.1 255.255.254.0 Yes 192.168.8.3
LAN16 00-1D-AA-21-26-68 192.168.16.1 255.255.248.0 No 192.168.8.3
IP Routed Subnet 00-1D-AA-21-26-68 192.168.0.1 255.255.255.0 Yes 192.168.8.3

What Lan is your Windows Server network on, as your picture if for Lan8 and this shows you using 'Enable Relay Agent'

If it is Lan8, change DHCP to disable.

Also check you are running the latest firmware , as this is a newest device

DHCP is on LAN8 so I will set it to disable. I also think the 8.8.8.8 DNS is probably because the firewall isn't live yet, I will post back when I connect it.

It is running the latest firmware, I updated it yesterday