Encaminhamento de porta router 3COM 5012 (13701)

Alguém pode ajudar com o passo a passo para fazer um encaminhamento de porta 3389 apontando para o IP interno 192.168.0.3 no roteador 3COM 5012 (13701)?
Abaixo a configuração do equipamento:

<Router>dis cur
#
#3Com Router Software Extended_V3.00
#
sysname Router
#
configure-user count 2
#
cpu-usage cycle 1min
#
nat address-group 1 201.183.61.61 201.183.61.68
#
radius scheme system
#
domain system
#
local-user admin
password cipher .]@USE=A,23Q=^Q`MEB2<1!!
service-type telnet terminal
level 3
service-type ftp
#
acl number 2001
rule 1 permit source 192.168.0.0 0.0.0.255
acl number 2424
#
interface Aux0
async mode flow
#
interface Ethernet0/0
ip address 192.168.0.252 255.255.255.0
#
interface Serial0/0
clock DTECLK1
link-protocol ppp
ip address 201.185.162.39 255.255.255.252
nat outbound 2001 address-group 1
#
interface NULL0
#
FTP server enable
#
undo dhcp enable
#
ip route-static 0.0.0.0 0.0.0.0 201.181.165.37 preference 60
#
user-interface con 0
user-interface aux 0
user-interface vty 0 4
authentication-mode scheme
#
return


<Router>
<Router>