Configure your pfSense as follows:

  • Under DNS Resolver: nothing enabled
  • Under DNS Forwarder:
    • Enable: Checked off.
    • DHCP Registration: Checked off.
    • Static DHCP: Checked off.
    • DNS Query Forwarding
    • Query DNS servers sequentially: Checked off.
    • Do not forward private reverse lookups: Checked off. 

An IPv4 work around may be required, involving 2 setting changes:

a) Assign the router a static IP of
b) Set the "IPv4 Upstream gateway" to