Use the below. This is port forwarding. if you need to do port mapping, you can change the dst-ports and to-ports.
/ip firewall nat add protocol=tcp dst-port=8080 action=dst-nat to-addresses=192.168.1.100 to-ports=8080
Use the below. This is port forwarding. if you need to do port mapping, you can change the dst-ports and to-ports.
/ip firewall nat add protocol=tcp dst-port=8080 action=dst-nat to-addresses=192.168.1.100 to-ports=8080