Question:
What must be entered to set up DNS forwarding in the LANCOM router?

Answer:
DNS forwarding is set up in LANconfig under IPv4 → DNS:
Under Forwarding specify *.company.local:
You can enter an IP address instead of a remote site here.
This entry causes DNS requests with the suffix *.company.local to be forwarded directly to the DNS server
with the IP address 192.168.4.1.