Share DNS servers on LAN net with GUEST net

[tomlawesome]

Hello, I'm really struggling to understand how firewall rules work, and how to create them with the correct destinations/sources.

• 
  I have 2 RaspberryPi running AdGuard Home for my network DNS and they are connected to LAN interface
  
• I have wireless access point for guests on GUEST interface.

I want clients connected to the guest wireless accesspoint to use AdGuard devices for their DNS, and to get this with their DHCP request. I dont want any other port/IP connection between LAN and GUEST if possible?

If any one is able to help me, I'd greatly appreciate it.

[lfirewall1243]

Which DNS Server do you server to the GuestNet DHCP Clients?

[tomlawesome]

Which DNS Server do you server to the GuestNet DHCP Clients?

xx.xx.200.1

I tried changing it to xx.xx.1.2 and xx.xx.1.3 but it still didn't work.