The solution could be to install pihole, disable dhcp on router, setup pihole to be dhcp, and add the ddns hostname on Pihole as an internal address. Make sure that the ISP router which is updating the ddns is not using the Pihole for dns.
The solution could be to install pihole, disable dhcp on router, setup pihole to be dhcp, and add the ddns hostname on Pihole as an internal address. Make sure that the ISP router which is updating the ddns is not using the Pihole for dns.