external to internal IP

afternoon

We have a client on our network running on a 192.168.0.0 non routable IP. a connection needs to be made by someone outside our network to this client

now we have a live ip that is not being used, how can i set it up that when you guy outside our network tries to make a connection to this external ip it points him through to the clients ip on our network

add a dstnat rule with his internal IP as the target

Simple example can be found here: http://wiki.mikrotik.com/wiki/Forwarding_a_port_to_an_internal_IP