after updating to IPFire 2.29 (x86_64) - Core-Update 203 Development Build: master/9b7ed567 Green DNS is not servicing Blue Network. I had to set Blue Network to a public DNS.
How can I patch blue network to use Green DNS?
Alternatively, I could host a Pi-Hole DNS in the Blue network, but what would I set in IPFire so the DNS server in the Blue network gets its upstream DNS from the Green DNS server?
The question is, are you using a DHCP server on the Blue network? If so, enter the IP address of the Blue IPFire interface in the DHCP settings for the Blue network.