Hi,
Here is a good example for you:
http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a00804708b4.shtmlyou need something this:
global (outside) 1 interface
access-list 102 permit tcp any host x.x.x.x eq ssh
access-list 102 permit tcp any host x.x.x.x eq telnet
static (inside,outside) tcp 172.18.124.99 telnet 10.1.1.6
telnet netmask 255.255.255.255 0 0
static (inside,outside) tcp 172.18.124.99 ssh 10.1.1.6
ssh netmask 255.255.255.255 0 0
access-group 102 in interface outside
clear xlate