MikroTik does not have a built-in feature to forward individual DNS zones to different external DNS servers. This functionality is often necessary when connecting multiple sites via VPN and utilizing multiple internal DNS servers. However, with the following workaround, you can achieve conditional DNS zone forwarding without the need for scripting:
/ip firewall layer7-protocol
add name="MyDomain DNS port forward" regexp="my.local.domain|[0-9]+.[0-9]+.168.192.in-addr.arpa"
/ip firewall nat add action=masquerade chain=srcnat comment="NAT to MyDomain DNS" disabled=no dst-address=192.168.0.1/32 dst-port=53 protocol=udp
/ip firewall nat add action=dst-nat chain=dstnat disabled=no dst-address-type=local dst-port=53 layer7-protocol="MyDomain DNS port forward" protocol=udp to-addresses=192.168.0.1 to-ports=53A little tip: the name of the protocol in the first command is used again in the last command, so they must be identical
You may need to allow remote DNS queries on the remote DNS server. if it is also a MikroTik you could use the following command:
/ip dns set allow-remote-requests=yes