Here is the basic formula
Build Access List to allow the traffic in (one line for each port)-
access-list outside_access_in permit tcp any host [ExternalIP] eq [Port#]
Apply the ACL to the outside interface -
access-group outside_access_in in interface outside
Map incoming port to an IP and port on the inside (one line for each port)-
static (inside,outside) tcp [ExternalIP] [Port#] [InteralIP] [Port#] netmask 255.255.255.255
Brent
Systems Engineer / Consultant
CCNP, CCSP