M.I.T = Multimedia IT dept.

add the following to pf.conf, then pfctl -f /etc/pf.conf:

ext_if = "em0"
ext_ip = "8.8.8.8"
pass in on $ext_if proto tcp from any to $ext_ip port 3389 rdr-to $mms_ip
pass in on $ext_if proto tcp from any to $ext_ip port 554 rdr-to $mms_ip
pass in on $ext_if proto tcp from any to $ext_ip port 1755 rdr-to $mms_ip
pass in on $ext_if proto tcp from any to $ext_ip port 80 rdr-to $mms_ip
pass in on $ext_if proto tcp from any to $ext_ip port 8080 rdr-to $mms_ip

REFERENCE: http://www.openbsd.org/faq/pf/rdr.html